Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.
Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
Photosensitive afferent neurons located primarily within the FOVEA CENTRALIS of the MACULA LUTEA. There are three major types of cone cells (red, blue, and green) whose photopigments have different spectral sensitivity curves. Retinal cone cells operate in daylight vision (at photopic intensities) providing color recognition and central visual acuity.
Radiographic techniques used in dentistry.
Bulbous enlargement of the growing tip of nerve axons and dendrites. They are crucial to neuronal development because of their pathfinding ability and their role in synaptogenesis.
Imaging methods that result in sharp images of objects located on a chosen plane and blurred images located above or below the plane.
X-ray image-detecting devices that make a focused image of body structures lying in a predetermined plane from which more complex images are computed.
Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.
A rapid, low-dose, digital imaging system using a small intraoral sensor instead of radiographic film, an intensifying screen, and a charge-coupled device. It presents the possibility of reduced patient exposure and minimal distortion, although resolution and latitude are inferior to standard dental radiography. A receiver is placed in the mouth, routing signals to a computer which images the signals on a screen or in print. It includes digitizing from x-ray film or any other detector. (From MEDLINE abstracts; personal communication from Dr. Charles Berthold, NIDR)
The largest and strongest bone of the FACE constituting the lower jaw. It supports the lower teeth.
The use of a device composed of thermoluminescent material for measuring exposure to IONIZING RADIATION. The thermoluminescent material emits light when heated. The amount of light emitted is proportional to the amount of ionizing radiation to which the material has been exposed.
Materials used as reference points for imaging studies.
An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as CANCER; CARDIOVASCULAR SYSTEM; and brain. SINGLE-PHOTON EMISSION-COMPUTED TOMOGRAPHY is closely related to positron emission tomography, but uses isotopes with longer half-lives and resolution is lower.
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
An imaging method using LASERS that is used for mapping subsurface structure. When a reflective site in the sample is at the same optical path length (coherence) as the reference mirror, the detector observes interference fringes.
The amount of radiation energy that is deposited in a unit mass of material, such as tissues of plants or animal. In RADIOTHERAPY, radiation dosage is expressed in gray units (Gy). In RADIOLOGIC HEALTH, the dosage is expressed by the product of absorbed dose (Gy) and quality factor (a function of linear energy transfer), and is called radiation dose equivalent in sievert units (Sv).
Photosensitive proteins expressed in the CONE PHOTORECEPTOR CELLS. They are the protein components of cone photopigments. Cone opsins are classified by their peak absorption wavelengths.
Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.
The posterior process on the ramus of the mandible composed of two parts: a superior part, the articular portion, and an inferior part, the condylar neck.
An articulation between the condyle of the mandible and the articular tubercle of the temporal bone.
Computer systems or networks designed to provide radiographic interpretive information.
Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
The total absence of teeth from either the mandible or the maxilla, but not both. Total absence of teeth from both is MOUTH, EDENTULOUS. Partial absence of teeth in either is JAW, EDENTULOUS, PARTIALLY.
Types of spiral computed tomography technology in which multiple slices of data are acquired simultaneously improving the resolution over single slice acquisition technology.
The closeness of a determined value of a physical dimension to the actual value.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
The part of a tooth from the neck to the apex, embedded in the alveolar process and covered with cementum. A root may be single or divided into several branches, usually identified by their relative position, e.g., lingual root or buccal root. Single-rooted teeth include mandibular first and second premolars and the maxillary second premolar teeth. The maxillary first premolar has two roots in most cases. Maxillary molars have three roots. (Jablonski, Dictionary of Dentistry, 1992, p690)
Extraoral body-section radiography depicting an entire maxilla, or both maxilla and mandible, on a single film.
Three-dimensional computed tomographic imaging with the added dimension of time, to follow motion during imaging.
Projection of near-IR light (INFRARED RAYS), in the 700-1000 nm region, across an object in parallel beams to an array of sensitive photodetectors. This is repeated at various angles and a mathematical reconstruction provides three dimensional MEDICAL IMAGING of tissues. Based on the relative transparency of tissues to this spectra, it has been used to monitor local oxygenation, brain and joints.
Diseases of the PERIAPICAL TISSUE surrounding the root of the tooth, which is distinguished from DENTAL PULP DISEASES inside the TOOTH ROOT.
The thickest and spongiest part of the maxilla and mandible hollowed out into deep cavities for the teeth.
Screens which absorb the energy in the x-ray beam that has penetrated the patient and convert this energy into a light pattern which has as nearly as possible the same information as the original x-ray beam. The more light a screen produces for a given input of x-radiation, the less x-ray exposure and thus shorter exposure time are needed to expose the film. In most film-screen systems, the film is sandwiched between two screens in a cassette so that the emulsion on each side is exposed to the light from its contiguous screen.
Descriptive anatomy based on three-dimensional imaging (IMAGING, THREE-DIMENSIONAL) of the body, organs, and structures using a series of computer multiplane sections, displayed by transverse, coronal, and sagittal analyses. It is essential to accurate interpretation by the radiologist of such techniques as ultrasonic diagnosis, MAGNETIC RESONANCE IMAGING, and computed tomography (TOMOGRAPHY, X-RAY COMPUTED). (From Lane & Sharfaei, Modern Sectional Anatomy, 1992, Preface)
Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.
Computer-assisted mathematical calculations of beam angles, intensities of radiation, and duration of irradiation in radiotherapy.
A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.
A tooth that is prevented from erupting by a physical barrier, usually other teeth. Impaction may also result from orientation of the tooth in an other than vertical position in the periodontal structures.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
The third tooth to the left and to the right of the midline of either jaw, situated between the second INCISOR and the premolar teeth (BICUSPID). (Jablonski, Dictionary of Dentistry, 1992, p817)
The measurement of the dimensions of the HEAD.
A tomographic technique for obtaining 3-dimensional images with transmission electron microscopy.
Break or rupture of a tooth or tooth root.
Either of a pair of compound bones forming the lateral (left and right) surfaces and base of the skull which contains the organs of hearing. It is a large bone formed by the fusion of parts: the squamous (the flattened anterior-superior part), the tympanic (the curved anterior-inferior part), the mastoid (the irregular posterior portion), and the petrous (the part at the base of the skull).
A film base coated with an emulsion designed for use with x-rays.
Methods of creating machines and devices.
X-RAY COMPUTERIZED TOMOGRAPHY with resolution in the micrometer range.
A dead body, usually a human body.
The ratio of radiation dosages required to produce identical change based on a formula comparing other types of radiation with that of gamma or roentgen rays.
The air space located in the body of the MAXILLARY BONE near each cheek. Each maxillary sinus communicates with the middle passage (meatus) of the NASAL CAVITY on the same side.
Moving a patient into a specific position or POSTURE to facilitate examination, surgery, or for therapeutic purposes.
Use of optic and geometric techniques to enhance radiographic image quality and interpretation. It includes use of microfocal X-ray tubes and intensifying fluoroscopic screens.
Reference points located by visual inspection, palpation, or computer assistance, that are useful in localizing structures on or within the human body.
One of a pair of irregularly shaped bones that form the upper jaw. A maxillary bone provides tooth sockets for the superior teeth, forms part of the ORBIT, and contains the MAXILLARY SINUS.
Technique involving the passage of X-rays through oral structures to create a film record while a central tab or wing of dental X-ray film is being held between upper and lower teeth.
The inferior region of the skull consisting of an internal (cerebral), and an external (basilar) surface.
A normal developing tooth which has not yet perforated the oral mucosa or one that fails to erupt in the normal sequence or time interval expected for the type of tooth in a given gender, age, or population group.
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).
Tomography using x-ray transmission.
A dental specialty concerned with the prevention and correction of dental and oral anomalies (malocclusion).
The use of a radiation monitoring device composed of material which emits light after being illuminated. The amount of light emitted is proportional to the amount of IONIZING RADIATION to which the material has been previously exposed.
A variety of conditions affecting the anatomic and functional characteristics of the temporomandibular joint. Factors contributing to the complexity of temporomandibular diseases are its relation to dentition and mastication and the symptomatic effects in other areas which account for referred pain to the joint and the difficulties in applying traditional diagnostic procedures to temporomandibular joint pathology where tissue is rarely obtained and x-rays are often inadequate or nonspecific. Common diseases are developmental abnormalities, trauma, subluxation, luxation, arthritis, and neoplasia. (From Thoma's Oral Pathology, 6th ed, pp577-600)
Photosensitive afferent neurons located in the peripheral retina, with their density increases radially away from the FOVEA CENTRALIS. Being much more sensitive to light than the RETINAL CONE CELLS, the rod cells are responsible for twilight vision (at scotopic intensities) as well as peripheral vision, but provide no color discrimination.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
Resorption in which cementum or dentin is lost from the root of a tooth owing to cementoclastic or osteoclastic activity in conditions such as trauma of occlusion or neoplasms. (Dorland, 27th ed)
Radiography of the SALIVARY GLANDS or ducts following injection of contrast medium.
The most posterior teeth on either side of the jaw, totaling eight in the deciduous dentition (2 on each side, upper and lower), and usually 12 in the permanent dentition (three on each side, upper and lower). They are grinding teeth, having large crowns and broad chewing surfaces. (Jablonski, Dictionary of Dentistry, 1992, p821)
The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.
A hollow part of the alveolar process of the MAXILLA or MANDIBLE where each tooth fits and is attached via the periodontal ligament.
A tooth from which the dental pulp has been removed or is necrotic. (Boucher, Clinical Dental Terminology, 4th ed)
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
The total amount of radiation absorbed by tissues as a result of radiotherapy.
The compound is given by intravenous injection to do POSITRON-EMISSION TOMOGRAPHY for the assessment of cerebral and myocardial glucose metabolism in various physiological or pathological states including stroke and myocardial ischemia. It is also employed for the detection of malignant tumors including those of the brain, liver, and thyroid gland. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1162)
The use of pre-treatment imaging modalities to position the patient, delineate the target, and align the beam of radiation to achieve optimal accuracy and reduce radiation damage to surrounding non-target tissues.
Behavior of LIGHT and its interactions with itself and materials.
Either of a pair of bones that form the prominent part of the CHEEK and contribute to the ORBIT on each side of the SKULL.
Devices, usually alloplastic, surgically inserted into or onto the jawbone, which support a single prosthetic tooth and serve either as abutments or as cosmetic replacements for missing teeth.
An abnormal hardening or increased density of bone tissue.
Computer systems or programs used in accurate computations for providing radiation dosage treatment to patients.
Photosensitive proteins expressed in the ROD PHOTORECEPTOR CELLS. They are the protein components of rod photoreceptor pigments such as RHODOPSIN.
The measurement of radiation by photography, as in x-ray film and film badge, by Geiger-Mueller tube, and by SCINTILLATION COUNTING.
CONFORMAL RADIOTHERAPY that combines several intensity-modulated beams to provide improved dose homogeneity and highly conformal dose distributions.
Devices which accelerate electrically charged atomic or subatomic particles, such as electrons, protons or ions, to high velocities so they have high kinetic energy.
The dense rock-like part of temporal bone that contains the INNER EAR. Petrous bone is located at the base of the skull. Sometimes it is combined with the MASTOID PROCESS and called petromastoid part of temporal bone.
Modality of computed tomography in which the patient is irradiated in a spiral path around the body with a cone or pyramid-shaped beam.
The ten-layered nervous tissue membrane of the eye. It is continuous with the OPTIC NERVE and receives images of external objects and transmits visual impulses to the brain. Its outer surface is in contact with the CHOROID and the inner surface with the VITREOUS BODY. The outer-most layer is pigmented, whereas the inner nine layers are transparent.
Bony outgrowth usually found around joints and often seen in conditions such as ARTHRITIS.
Positively-charged atomic nuclei that have been stripped of their electrons. These particles have one or more units of electric charge and a mass exceeding that of the Helium-4 nucleus (alpha particle).
A dental specialty concerned with the maintenance of the dental pulp in a state of health and the treatment of the pulp cavity (pulp chamber and pulp canal).
A specialty concerned with the use of x-ray and other forms of radiant energy in the diagnosis and treatment of disease.
Recording of electric potentials in the retina after stimulation by light.
Specialized cells that detect and transduce light. They are classified into two types based on their light reception structure, the ciliary photoreceptors and the rhabdomeric photoreceptors with MICROVILLI. Ciliary photoreceptor cells use OPSINS that activate a PHOSPHODIESTERASE phosphodiesterase cascade. Rhabdomeric photoreceptor cells use opsins that activate a PHOSPHOLIPASE C cascade.
A branch of the external carotid artery which distributes to the deep structures of the face (internal maxillary) and to the side of the face and nose (external maxillary).
The observation, either continuously or at intervals, of the levels of radiation in a given area, generally for the purpose of assuring that they have not exceeded prescribed amounts or, in case of radiation already present in the area, assuring that the levels have returned to those meeting acceptable safety standards.
Presentation devices used for patient education and technique training in dentistry.
Usually a written medical and nursing care program designed for a particular patient.
The SKELETON of the HEAD including the FACIAL BONES and the bones enclosing the BRAIN.
The aftermost permanent tooth on each side in the maxilla and mandible.
Fractures of the lower jaw.
The use of an external beam of PROTONS as radiotherapy.
The facial skeleton, consisting of bones situated between the cranial base and the mandibular region. While some consider the facial bones to comprise the hyoid (HYOID BONE), palatine (HARD PALATE), and zygomatic (ZYGOMA) bones, MANDIBLE, and MAXILLA, others include also the lacrimal and nasal bones, inferior nasal concha, and vomer but exclude the hyoid bone. (Jablonski, Dictionary of Dentistry, 1992, p113)
The space in a tooth bounded by the dentin and containing the dental pulp. The portion of the cavity within the crown of the tooth is the pulp chamber; the portion within the root is the pulp canal or root canal.
Photosensitive protein complexes of varied light absorption properties which are expressed in the PHOTORECEPTOR CELLS. They are OPSINS conjugated with VITAMIN A-based chromophores. Chromophores capture photons of light, leading to the activation of opsins and a biochemical cascade that ultimately excites the photoreceptor cells.
The diversion of RADIATION (thermal, electromagnetic, or nuclear) from its original path as a result of interactions or collisions with atoms, molecules, or larger particles in the atmosphere or other media. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Fixed or removable devices that join teeth together. They are used to repair teeth that are mobile as a result of PERIODONTITIS.
One of the eight permanent teeth, two on either side in each jaw, between the canines (CUSPID) and the molars (MOLAR), serving for grinding and crushing food. The upper have two cusps (bicuspid) but the lower have one to three. (Jablonski, Dictionary of Dentistry, 1992, p822)
Combination or superimposition of two images for demonstrating differences between them (e.g., radiograph with contrast vs. one without, radionuclide images using different radionuclides, radiograph vs. radionuclide image) and in the preparation of audiovisual materials (e.g., offsetting identical images, coloring of vessels in angiograms).
Adjustment of the eyes under conditions of low light. The sensitivity of the eye to light is increased during dark adaptation.
Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons.
Defects of color vision are mainly hereditary traits but can be secondary to acquired or developmental abnormalities in the CONES (RETINA). Severity of hereditary defects of color vision depends on the degree of mutation of the ROD OPSINS genes (on X CHROMOSOME and CHROMOSOME 3) that code the photopigments for red, green and blue.
Irrigation of the nose with saline or irrigation solutions for diagnostic or therapeutic purposes. It is used to remove irritants, allergens, or microorganisms from the nose.
Malocclusion in which the mandible and maxilla are anteroposteriorly normal as reflected by the relationship of the first permanent molar (i.e., in neutroclusion), but in which individual teeth are abnormally related to each other.
Peculiarities associated with the internal structure, form, topology, or architecture of organisms that distinguishes them from others of the same species or group.
The comparison of the quantity of meaningful data to the irrelevant or incorrect data.
Resorption or wasting of the tooth-supporting bone (ALVEOLAR PROCESS) in the MAXILLA or MANDIBLE.
Biocompatible materials placed into (endosseous) or onto (subperiosteal) the jawbone to support a crown, bridge, or artificial tooth, or to stabilize a diseased tooth.
Diseases affecting or involving the PARANASAL SINUSES and generally manifesting as inflammation, abscesses, cysts, or tumors.
Insertion of an implant into the bone of the mandible or maxilla. The implant has an exposed head which protrudes through the mucosa and is a prosthodontic abutment.
The anatomical frontal portion of the mandible, also known as the mentum, that contains the line of fusion of the two separate halves of the mandible (symphysis menti). This line of fusion divides inferiorly to enclose a triangular area called the mental protuberance. On each side, inferior to the second premolar tooth, is the mental foramen for the passage of blood vessels and a nerve.
The total amount of a chemical, metal or radioactive substance present at any time after absorption in the body of man or animal.
Coagulated exudate isolated from several species of the tropical tree Palaquium (Sapotaceae). It is the trans-isomer of natural rubber and is used as a filling and impression material in dentistry and orthopedics and as an insulator in electronics. It has also been used as a rubber substitute.
Any of the eight frontal teeth (four maxillary and four mandibular) having a sharp incisal edge for cutting food and a single root, which occurs in man both as a deciduous and a permanent tooth. (Jablonski, Dictionary of Dentistry, 1992, p820)
Discrete concentrations of energy, apparently massless elementary particles, that move at the speed of light. They are the unit or quantum of electromagnetic radiation. Photons are emitted when electrons move from one energy state to another. (From Hawley's Condensed Chemical Dictionary, 11th ed)
The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.
Determination, by measurement or comparison with a standard, of the correct value of each scale reading on a meter or other measuring instrument; or determination of the settings of a control device that correspond to particular values of voltage, current, frequency or other output.
Bony cavity that holds the eyeball and its associated tissues and appendages.
Photosensitive proteins in the membranes of PHOTORECEPTOR CELLS such as the rods and the cones. Opsins have varied light absorption properties and are members of the G-PROTEIN-COUPLED RECEPTORS family. Their ligands are VITAMIN A-based chromophores.
The curve formed by the row of TEETH in their normal position in the JAW. The inferior dental arch is formed by the mandibular teeth, and the superior dental arch by the maxillary teeth.
An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
Radiotherapy where there is improved dose homogeneity within the tumor and reduced dosage to uninvolved structures. The precise shaping of dose distribution is achieved via the use of computer-controlled multileaf collimators.
A detailed review and evaluation of selected clinical records by qualified professional personnel for evaluating quality of dental care.
A class of statistical methods applicable to a large set of probability distributions used to test for correlation, location, independence, etc. In most nonparametric statistical tests, the original scores or observations are replaced by another variable containing less information. An important class of nonparametric tests employs the ordinal properties of the data. Another class of tests uses information about whether an observation is above or below some fixed value such as the median, and a third class is based on the frequency of the occurrence of runs in the data. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1284; Corsini, Concise Encyclopedia of Psychology, 1987, p764-5)
Specialized PHOTOTRANSDUCTION neurons in the vertebrates, such as the RETINAL ROD CELLS and the RETINAL CONE CELLS. Non-visual photoreceptor neurons have been reported in the deep brain, the PINEAL GLAND and organs of the circadian system.
The process in which light signals are transformed by the PHOTORECEPTOR CELLS into electrical signals which can then be transmitted to the brain.
A retrogressive pathological change in the retina, focal or generalized, caused by genetic defects, inflammation, trauma, vascular disease, or aging. Degeneration affecting predominantly the macula lutea of the retina is MACULAR DEGENERATION. (Newell, Ophthalmology: Principles and Concepts, 7th ed, p304)
Radiotherapy using high-energy (megavolt or higher) ionizing radiation. Types of radiation include gamma rays, produced by a radioisotope within a teletherapy unit; x-rays, electrons, protons, alpha particles (helium ions) and heavy charged ions, produced by particle acceleration; and neutrons and pi-mesons (pions), produced as secondary particles following bombardment of a target with a primary particle.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
Devices for accelerating protons or electrons in closed orbits where the accelerating voltage and magnetic field strength varies (the accelerating voltage is held constant for electrons) in order to keep the orbit radius constant.
A graphic means for assessing the ability of a screening test to discriminate between healthy and diseased persons; may also be used in other studies, e.g., distinguishing stimuli responses as to a faint stimuli or nonstimuli.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
The use of combination of imaging techniques or platforms (e.g., MRI SCAN and PET SCAN) encompassing aspects of anatomical, functional, or molecular imaging methods.
Unstable isotopes of fluorine that decay or disintegrate emitting radiation. F atoms with atomic weights 17, 18, and 20-22 are radioactive fluorine isotopes.
Any visual display of structural or functional patterns of organs or tissues for diagnostic evaluation. It includes measuring physiologic and metabolic responses to physical and chemical stimuli, as well as ultramicroscopy.
Nerve fibers that are capable of rapidly conducting impulses away from the neuron cell body.
Elements of limited time intervals, contributing to particular results or situations.
Pathologic deposition of calcium salts in tissues.
Mental processing of chromatic signals (COLOR VISION) from the eye by the VISUAL CORTEX where they are converted into symbolic representations. Color perception involves numerous neurons, and is influenced not only by the distribution of wavelengths from the viewed object, but also by its background color and brightness contrast at its boundary.
In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
A collective term for interstitial, intracavity, and surface radiotherapy. It uses small sealed or partly-sealed sources that may be placed on or near the body surface or within a natural body cavity or implanted directly into the tissues.
Sequential operating programs and data which instruct the functioning of a digital computer.
An area approximately 1.5 millimeters in diameter within the macula lutea where the retina thins out greatly because of the oblique shifting of all layers except the pigment epithelium layer. It includes the sloping walls of the fovea (clivus) and contains a few rods in its periphery. In its center (foveola) are the cones most adapted to yield high visual acuity, each cone being connected to only one ganglion cell. (Cline et al., Dictionary of Visual Science, 4th ed)
A specialized field of physics and engineering involved in studying the behavior and properties of light and the technology of analyzing, generating, transmitting, and manipulating ELECTROMAGNETIC RADIATION in the visible, infrared, and ultraviolet range.
The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.
An oval area in the retina, 3 to 5 mm in diameter, usually located temporal to the posterior pole of the eye and slightly below the level of the optic disk. It is characterized by the presence of a yellow pigment diffusely permeating the inner layers, contains the fovea centralis in its center, and provides the best phototropic visual acuity. It is devoid of retinal blood vessels, except in its periphery, and receives nourishment from the choriocapillaris of the choroid. (From Cline et al., Dictionary of Visual Science, 4th ed)
The adjustment of the eye to variations in the intensity of light. Light adaptation is the adjustment of the eye when the light threshold is increased; DARK ADAPTATION when the light is greatly reduced. (From Cline et al., Dictionary of Visual Science, 4th ed)
Computer-based representation of physical systems and phenomena such as chemical processes.
Rate of energy dissipation along the path of charged particles. In radiobiology and health physics, exposure is measured in kiloelectron volts per micrometer of tissue (keV/micrometer T).
The use of a heavy ion particle beam for radiotherapy, such as the HEAVY IONS of CARBON.
The use of computers for designing and/or manufacturing of anything, including drugs, surgical procedures, orthotics, and prosthetics.
Any device or element which converts an input signal into an output signal of a different form. Examples include the microphone, phonographic pickup, loudspeaker, barometer, photoelectric cell, automobile horn, doorbell, and underwater sound transducer. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)
Physical motion, i.e., a change in position of a body or subject as a result of an external force. It is distinguished from MOVEMENT, a process resulting from biological activity.
Hereditary, progressive degeneration of the neuroepithelium of the retina characterized by night blindness and progressive contraction of the visual field.
Neurons of the innermost layer of the retina, the internal plexiform layer. They are of variable sizes and shapes, and their axons project via the OPTIC NERVE to the brain. A small subset of these cells act as photoreceptors with projections to the SUPRACHIASMATIC NUCLEUS, the center for regulating CIRCADIAN RHYTHM.
Substances used to allow enhanced visualization of tissues.
In statistics, a technique for numerically approximating the solution of a mathematical problem by studying the distribution of some random variable, often generated by a computer. The name alludes to the randomness characteristic of the games of chance played at the gambling casinos in Monte Carlo. (From Random House Unabridged Dictionary, 2d ed, 1993)
Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.
Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Examination of the interior of the eye with an ophthalmoscope.
Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
The prototypical and most well-studied member of the semaphorin family. Semaphorin-3A is an axon-repulsive guidance cue for migrating neurons in the developing nervous system. It has so far been found only in vertebrates, and binds to NEUROPILIN-1/plexin complex receptors on growth cones. Like other class 3 semaphorins, it is a secreted protein.
Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.
The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior.
The first seven VERTEBRAE of the SPINAL COLUMN, which correspond to the VERTEBRAE of the NECK.
The relationship between the dose of administered radiation and the response of the organism or tissue to the radiation.
Detection and counting of scintillations produced in a fluorescent material by ionizing radiation.
Analytical technique for studying substances present at enzyme concentrations in single cells, in situ, by measuring light absorption. Light from a tungsten strip lamp or xenon arc dispersed by a grating monochromator illuminates the optical system of a microscope. The absorbance of light is measured (in nanometers) by comparing the difference between the image of the sample and a reference image.
X-ray visualization of the chest and organs of the thoracic cavity. It is not restricted to visualization of the lungs.
The use of IONIZING RADIATION to treat malignant NEOPLASMS and some benign conditions.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
Radiographic visualization of the body between the thorax and the pelvis, i.e., within the peritoneal cavity.
LIGHT, it's processes and properties, and the characteristics of materials interacting with it.
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
Pieces of glass or other transparent materials used for magnification or increased visual acuity.
Function of the human eye that is used in bright illumination or in daylight (at photopic intensities). Photopic vision is performed by the three types of RETINAL CONE PHOTORECEPTORS with varied peak absorption wavelengths in the color spectrum (from violet to red, 400 - 700 nm).
In tissue culture, hairlike projections of neurons stimulated by growth factors and other molecules. These projections may go on to form a branched tree of dendrites or a single axon or they may be reabsorbed at a later stage of development. "Neurite" may refer to any filamentous or pointed outgrowth of an embryonal or tissue-culture neural cell.
The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.
Methods and procedures for the diagnosis of diseases of the eye or of vision disorders.
Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes.
The amount of mineral per square centimeter of BONE. This is the definition used in clinical practice. Actual bone density would be expressed in grams per milliliter. It is most frequently measured by X-RAY ABSORPTIOMETRY or TOMOGRAPHY, X RAY COMPUTED. Bone density is an important predictor for OSTEOPOROSIS.
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
Type of vision test used to determine COLOR VISION DEFECTS.
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.
Organs which might be damaged during exposure to a toxin or to some form of therapy. It most frequently refers to healthy organs located in the radiation field during radiation therapy.
A genus of the Ambystomatidae family. The best known species are the axolotl AMBYSTOMA MEXICANUM and the closely related tiger salamander Ambystoma tigrinum. They may retain gills and remain aquatic without developing all of the adult characteristics. However, under proper changes in the environment they metamorphose.
Measurement of distances or movements by means of the phenomena caused by the interference of two rays of light (optical interferometry) or of sound (acoustic interferometry).

Correction of patient positioning errors based on in-line cone beam CTs: clinical implementation and first experiences. (1/574)

BACKGROUND: The purpose of the study was the clinical implementation of a kV cone beam CT (CBCT) for setup correction in radiotherapy. PATIENTS AND METHODS: For evaluation of the setup correction workflow, six tumor patients (lung cancer, sacral chordoma, head-and-neck and paraspinal tumor, and two prostate cancer patients) were selected. All patients were treated with fractionated stereotactic radiotherapy, five of them with intensity modulated radiotherapy (IMRT). For patient fixation, a scotch cast body frame or a vacuum pillow, each in combination with a scotch cast head mask, were used. The imaging equipment, consisting of an x-ray tube and a flat panel imager (FPI), was attached to a Siemens linear accelerator according to the in-line approach, i.e. with the imaging beam mounted opposite to the treatment beam sharing the same isocenter. For dose delivery, the treatment beam has to traverse the FPI which is mounted in the accessory tray below the multi-leaf collimator. For each patient, a predefined number of imaging projections over a range of at least 200 degrees were acquired. The fast reconstruction of the 3D-CBCT dataset was done with an implementation of the Feldkamp-David-Kress (FDK) algorithm. For the registration of the treatment planning CT with the acquired CBCT, an automatic mutual information matcher and manual matching was used. RESULTS AND DISCUSSION: Bony landmarks were easily detected and the table shifts for correction of setup deviations could be automatically calculated in all cases. The image quality was sufficient for a visual comparison of the desired target point with the isocenter visible on the CBCT. Soft tissue contrast was problematic for the prostate of an obese patient, but good in the lung tumor case. The detected maximum setup deviation was 3 mm for patients fixated with the body frame, and 6 mm for patients positioned in the vacuum pillow. Using an action level of 2 mm translational error, a target point correction was carried out in 4 cases. The additional workload of the described workflow compared to a normal treatment fraction led to an extra time of about 10-12 minutes, which can be further reduced by streamlining the different steps. CONCLUSION: The cone beam CT attached to a LINAC allows the acquisition of a CT scan of the patient in treatment position directly before treatment. Its image quality is sufficient for determining target point correction vectors. With the presented workflow, a target point correction within a clinically reasonable time frame is possible. This increases the treatment precision, and potentially the complex patient fixation techniques will become dispensable.  (+info)

Cone-beam micro-CT system based on LabVIEW software. (2/574)

Construction of a cone-beam computed tomography (CBCT) system for laboratory research usually requires integration of different software and hardware components. As a result, building and operating such a complex system require the expertise of researchers with significantly different backgrounds. Additionally, writing flexible code to control the hardware components of a CBCT system combined with designing a friendly graphical user interface (GUI) can be cumbersome and time consuming. An intuitive and flexible program structure, as well as the program GUI for CBCT acquisition, is presented in this note. The program was developed in National Instrument's Laboratory Virtual Instrumentation Engineering Workbench (LabVIEW) graphical language and is designed to control a custom-built CBCT system but has been also used in a standard angiographic suite. The hardware components are commercially available to researchers and are in general provided with software drivers which are LabVIEW compatible. The program structure was designed as a sequential chain. Each step in the chain takes care of one or two hardware commands at a time; the execution of the sequence can be modified according to the CBCT system design. We have scanned and reconstructed over 200 specimens using this interface and present three examples which cover different areas of interest encountered in laboratory research. The resulting 3D data are rendered using a commercial workstation. The program described in this paper is available for use or improvement by other researchers.  (+info)

On-line target position localization in the presence of respiration: a comparison of two methods. (3/574)

PURPOSE: To compare two "four-dimensional" methods for image-guided target localization in the presence of respiration. METHODS AND MATERIALS: Four-dimensional image guidance was performed with two methods. A respiration-correlated computed tomography (RCCT) was acquired on a CT simulator, and an average CT (AVG-CT) image was generated from the RCCT. A respiration-correlated cone-beam CT (RC-CBCT) and a free-breathing cone-beam CT (FB-CBCT) were acquired. The "RCCT method" consisted of calculating the mean target position on both the RCCT and RC-CBCT, registering the RCCT to the RC-CBCT, and determining the shift in the mean target position from the planned mean position. The "AVG-CT method" consisted of registering the AVG-CT to the FB-CBCT. The ability of each to measure the shift in the mean target position was compared, both in a respiratory phantom and in 8 patients. RESULTS: In phantom, the RCCT and AVG-CT methods were able to measure the true mean target position to within 0.15 cm and 0.10 cm, respectively. In the patient study, the mean error between the methods was 0.13 cm (left-right), 0.14 cm (anterior-posterior), and 0.10 cm (cranio-caudal). The error was not observed to vary with tumor position or magnitude of tumor motion. CONCLUSIONS: Respiration may impact the on-line image guidance process. The RCCT method enables localization of the mean tumor position and measurement of changes in the motion pattern, whereas the AVG-CT method is simple, fast, and easily implemented. We found the methods to be nearly equivalent in detecting shifts in the mean tumor position.  (+info)

Development of three-dimensional FE modeling system from the limited cone beam CT images for orthodontic tipping tooth movement. (4/574)

Previously, numerous three-dimensional finite element (FE) models of the dentoalveolar complex have been developed and stress analyses of orthodontic tooth movements were reported. Most of the models were, however, developed based on average anatomical data, but not on individual data. The aim of this study, therefore, was to investigate dentoalveolar stress distribution by lingual and distal tipping tooth movements using FE models of individual teeth based on the limited cone beam CT (3DX) images. Three extracted teeth (lower canine, upper molar, and lower molar) were used to test the three-dimensional reconstruction procedure in terms of accuracy and reproducibility in linear dimensions and sizes. From the stress analysis of the three different models, the equivalent stress in tipping movement concentrated at the cervical region of the PDL and bone crest in all teeth. It was suggested that the FE modeling technique based on 3DX in this study is recommended for the individual determination of optimal orthodontic force for effective tooth movement.  (+info)

Balancing radiation dose and image quality: clinical applications of neck volume CT. (5/574)

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Monte Carlo investigations of megavoltage cone-beam CT using thick, segmented scintillating detectors for soft tissue visualization. (6/574)

Megavoltage cone-beam computed tomography (MV CBCT) is a highly promising technique for providing volumetric patient position information in the radiation treatment room. Such information has the potential to greatly assist in registering the patient to the planned treatment position, helping to ensure accurate delivery of the high energy therapy beam to the tumor volume while sparing the surrounding normal tissues. Presently, CBCT systems using conventional MV active matrix flat-panel imagers (AMFPIs), which are commonly used in portal imaging, require a relatively large amount of dose to create images that are clinically useful. This is due to the fact that the phosphor screen detector employed in conventional MV AMFPIs utilizes only approximately 2% of the incident radiation (for a 6 MV x-ray spectrum). Fortunately, thick segmented scintillating detectors can overcome this limitation, and the first prototype imager has demonstrated highly promising performance for projection imaging at low doses. It is therefore of definite interest to examine the potential performance of such thick, segmented scintillating detectors for MV CBCT. In this study, Monte Carlo simulations of radiation energy deposition were used to examine reconstructed images of cylindrical CT contrast phantoms, embedded with tissue-equivalent objects. The phantoms were scanned at 6 MV using segmented detectors having various design parameters (i.e., detector thickness as well as scintillator and septal wall materials). Due to constraints imposed by the nature of this study, the size of the phantoms was limited to approximately 6 cm. For such phantoms, the simulation results suggest that a 40 mm thick, segmented CsI detector with low density septal walls can delineate electron density differences of approximately 2.3% and 1.3% at doses of 1.54 and 3.08 cGy, respectively. In addition, it was found that segmented detectors with greater thickness, higher density scintillator material, or lower density septal walls exhibit higher contrast-to-noise performance. Finally, the performance of various segmented detectors obtained at a relatively low dose (1.54 cGy) was compared with that of a phosphor screen similar to that employed in conventional MV AMFPIs. This comparison indicates that for a phosphor screen to achieve the same contrast-to-noise performance as the segmented detectors approximately 18 to 59 times more dose is required, depending on the configuration of the segmented detectors.  (+info)

In vivo comparison of conventional and cone beam CT synthesized cephalograms. (7/574)

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Asymmetric vascular stent: feasibility study of a new low-porosity patch-containing stent. (8/574)

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Purpose: Compressed sensing (CS)-based iterative reconstruction (IR) techniques are able to reconstruct cone-beam CT (CBCT) images from undersampled noisy data, allowing for imaging dose reduction. However, there are a few practical concerns preventing the clinical implementation of these techniques. On the image quality side, data truncation along the superior-inferior direction under the cone-beam geometry produces severe cone artifacts in the reconstructed images. Ring artifacts are also seen in the half-fan scan mode. On the reconstruction efficiency side, the long computation time hinders clinical use in image-guided radiation therapy (IGRT). Methods: Image quality improvement methods are proposed to mitigate the cone and ring image artifacts in IR. The basic idea is to use weighting factors in the IR data fidelity term to improve projection data consistency with the reconstructed volume. In order to improve the computational efficiency, a multiple graphics processing units (GPUs)-based ...
Purpose: Due to the limited number of projections at each phase, the image quality of a four-dimensional cone-beam CT (4D-CBCT) is often degraded, which decreases the accuracy of subsequent motion modeling. One of the promising methods is the simultaneous motion estimation and image reconstruction (SMEIR) approach. The objective of this work is to enhance the computational speed of the SMEIR algorithm using adaptive feature-based tetrahedral meshing and GPU-based parallelization. Methods: The first step is to generate the tetrahedral mesh based on the features of a reference phase 4D-CBCT, so that the deformation can be well captured and accurately diffused from the mesh vertices to voxels of the image volume. After the mesh generation, the updated motion model and other phases of 4D-CBCT can be obtained by matching the 4D-CBCT projection images at each phase with the corresponding forward projections of the deformed reference phase of 4D-CBCT. The entire process of this 4D-CBCT reconstruction ...
DOI: 10.11607/jomi.3524 Purpose: To evaluate the influence of the milliamperage settings on cone beam computed tomography (CBCT) images for qualitative and quantitative preoperative implant planning. Materials and Methods: Eight dry mandibles were scanned under different milliamperage values (2, 4, 6.3, 8, 10, 12, and 15 mA) available for selection on the Kodak 9000 CBCT unit. Cross-sectional slices of incisor, canine, premolar, first molar, and second molar regions were analyzed by three oral radiologists. A subjective image quality evaluation of the anatomical structures and an objective evaluation using bone height measurements compared with the real measurements obtained in the mandible were performed. After 30 days, 25% of the sample was reevaluated to obtain the reproducibility of the results. Results: The weighted-kappa coefficient and intraclass correlation coefficient for intra- and interobserver agreement varied between moderate and substantial agreement for the image quality ...
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We investigate lesion detectability and its trends for different noise structures in single-slice and multislice CBCT images with anatomical background noise. Anatomical background noise is modeled using a power law spectrum of breast anatomy. Spherical signal with a 2 mm diameter is used for modeling a lesion. CT projection data are acquired by the forward projection and reconstructed by the Feldkamp-Davis-Kress algorithm. To generate different noise structures, two types of reconstruction filters (Hanning and Ram-Lak weighted ramp filters) are used in the reconstruction, and the transverse and longitudinal planes of reconstructed volume are used for detectability evaluation. To evaluate single-slice images, the central slice, which contains the maximum signal energy, is used. To evaluate multislice images, central nine slices are used. Detectability is evaluated using human and model observer studies. For model observer, channelized Hotelling observer (CHO) with dense difference-of-Gaussian ...
Conebeam CT (CBCT) is an imaging technique that employs a divergent x-ray source and usually a large-area flat-panel detector to form a cone-shaped exposure to the imaged object. Such a configuration guarantees the volume coverage of one large object and achieves the volumetric imaging within one single scan. The first CBCT scanner entered the market in 1996 as the dental scanner by NewTom Corp. Subsequently, CBCT was extended to multiple clinical applications, including implantology, orthopedics, interventional radiology, and radiation oncology.
Differences between IG using 4D-CBCT as gold standard and the two IG techniques using 3D-CBCT were 3.6 mm (IG-3D) and 1.9 mm (IG-ITV) on average. These uncertainties of 3D CBCT IG appear especially large when compared to the average base-line shift of 4.9 mm in our study, the reason for performing soft-tissue IG. Korreman et al. estimated the residual uncertainty of the IG procedure to 20 % of the initial motion [5], which is optimistic based on our results. Differences in the tumor position between 4D-CBCT and 3D-CBCT based IG increased with increasing motion magnitude of the pulmonary targets and increased with worse image quality scores of 3D-CBCT. These results clearly indicate that 3D-CBCT is not fully sufficient for full motion integration into IG.. This finding of improved accuracy using 4D-CBCT compared to 3D-CBCT is in contrast to the study by Hugo et al. [7], which could be explained by two reasons. First, our study is based on a larger number of patients and poor image quality of the ...
C-arm cone-beam computed tomography (CT)-guided transthoracic lung core needle biopsy (CNB) is a safe and accurate procedure for the evaluation of patients with pulmonary nodules. This article will focus on the clinical features related to CNB in terms of diagnostic performance and complication rate. Moreover, the concept of categorizing pathological diagnosis into 4 categories, which could be used for clinical management, follow-up, and quality assurance is also introduced. We retrospectively collected data regarding 375 C-arm cone-beam CT-guided CNBs from January 2010 and June 2014. Clinical and radiological variables were evaluated in terms of success or failure rate. Pathological reports were inserted in 4 homogenous groups (nondiagnostic--L1, benign--L2, malignant not otherwise specified--L3, and malignant with specific histotype--L4), defining for each category a hierarchy of suggested actions. The sensitivity, specificity, and positive and negative predictive value and accuracy for ...
C-arm cone-beam computed tomography (CT)-guided transthoracic lung core needle biopsy (CNB) is a safe and accurate procedure for the evaluation of patients with pulmonary nodules. This article will focus on the clinical features related to CNB in terms of diagnostic performance and complication rate. Moreover, the concept of categorizing pathological diagnosis into 4 categories, which could be used for clinical management, follow-up, and quality assurance is also introduced. We retrospectively collected data regarding 375 C-arm cone-beam CT-guided CNBs from January 2010 and June 2014. Clinical and radiological variables were evaluated in terms of success or failure rate. Pathological reports were inserted in 4 homogenous groups (nondiagnostic--L1, benign--L2, malignant not otherwise specified--L3, and malignant with specific histotype--L4), defining for each category a hierarchy of suggested actions. The sensitivity, specificity, and positive and negative predictive value and accuracy for ...
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The purpose of this study was to assess the structural characteristics of styloid process (SP) by cone-beam computed tomography (CBCT) examination in a patient population suffering from orofacial pain. The second aim was to assess the prevalence of elongated SP and its relation to gender, site and subjective symptoms in the study population. Clinical and radiographic records of 208 patients were evaluated retrospectively. Radiological examinations including measurements of the structure, length, and medial angulations of SP were performed on CBCT images. Out of 208 patients, 96 (46%) had not-elongated SP, 28 (13%) had left side, 16 (8%) had right side, and 68 (33%) had bilateral elongation of SP. The patients with elongated SP had significantly decreased angle values. There were no statistically significant differences in length values of SP between males and females in both groups. Significantly increased prevalence of symptoms except headache was observed in patients with elongated SP. This study
According to a new report published by Allied Market Research, titled, CBCT Systems Market: Global Opportunity Analysis and Industry Forecast, 2017-2023, the global CBCT systems market was valued at $536 million in 2016, and is projected to reach $1,041 million by 2023, growing at a CAGR of 9.9% from 2017 to 2023. Dental application segment held more than four-fifths share of the total market in 2016.. Cone beam computed tomography (CBCT) systems are a special type of x-ray equipment. These systems are used by medical professionals to reconstruct a 3D image of various regions of patients anatomy such as dental, oral and maxillofacial region, and ears, nose and throat.. Request for Summary of Report at https://www.alliedmarketresearch.com/request-free-sample/2274. Rise in geriatric population, wide range of applications of CBCT systems in dental practice and upsurge in number of patients suffering from dental diseases are expected to drive the market growth. Moreover, expanding application of ...
Dr. Mark Taff & Dr. Brad Levine specializes in using the Cone Beam, CT Scan and 3-D Imaging for advanced views below the surface. Schedule your appointment today to see Dr. Mark Taff & Dr. Brad Levine and get a closer look at your oral health.
Obtaining high-resolution CT scans for clinical applications is challenging, However, it could help better understand and treat such bone diseases as osteoporosis. High-resolution peripheral computed tomography (HR-pQCT) is considered the best technique in vivo. However, a breakthrough for clinical practice is lacking due to a relatively long acquisition time, which inhibits scanning of large field of view (FOV) in vivo. A promising alternative is the high-resolution cone-beam computed tomography (CBCT), which is already the gold standard in many dental and maxillofacial applications. The top high-resolution CBCT scanners on the market (eg., Newtom 5G) feature a fast scanning time (18 à 31s), a large FOV (12x12x8cm3) and a low radiation dosage, in addition to a high resolution (voxel size down to 75µm). Yet, CBCT is impaired by the presence of image artefacts that reduce image contrast, leading to it being currently used for qualitative evaluation only ...
For most offline calibration methods, a specific phantom scanning is often required before the following imaging tasks. Its time-consuming and unable to be applied to the unstable systems. Some online approaches dont have such drawbacks but their accuracy cannot fulfil requirements compared with the offline ones. This paper proposes an Epipolar geometry consistency based online geometric calibration for cone beam CT(CBCT). Four parameters: the detector skew, rotation axis, mid-plane and the source to detector distance are employed for geometrical modeling of CBCT in this paper. A cost function is built by exploiting the Epipolar geometry consistency among the projective views. By taking advantage of the simplex-simulated annealing algorithm(SIMPSA) algorithm to minimize the cost function, we can obtain the geometric parameters of our practical CBCT systems for image reconstruction. In simulation, different noise levels are added to projection images respectively and the experimental results ...
CBCT Systems Market was worth $536 million in 2016, and is estimated to reach $1,041 million by 2023, growing at a CAGR of 9.9% during the study period.
REFERENCES. 1. Farman AG, Scarfe WC. Development of imaging selection criteria and procedures should precede cephalometric assessment with cone-beam computed tomography. Am J Orthod Dentofacial Orthop. 2006;130(2):257-65. [ Links ] 2. Schulze D, Heiland M, Thurmann H, Adam G. Radiation exposure during midfacial imaging using 4- and 16-slice computed tomography, cone-beam computed tomography systems and conventional radiography. Dentomaxillofac Radiol. 2004;33(2):83-6. [ Links ] 3. Silva MA, Wolf U, Heinicke F, Bumann A, Visser H, Hirsch E. Cone-beam computed tomography for routine orthodontic treatment planning: a radiation dose evaluation. Am J Orthod Dentofacial Orthop. 2008;133(5):640.e1-5. [ Links ] 4. Tsiklakis K, Donta C, Gavala S, Karayianni K, Kamenopoulou V, Hourdakis CJ. Dose reduction in maxillofacial imaging using low dose Cone-beam CT. Eur J Radiol. 2005;56(3):413-7. [ Links ] 5. Scarfe W, Farman A. What is cone-beam CT and how does it work? Dent Clin North Am. 2008;52(4):707-30. [ ...
Exact Interior Reconstruction with Cone-Beam CT. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
We present a detailed derivation of the phase-retrieval formula based on the phase-attenuation duality that we recently proposed in previous brief communication. We have incorporated the effects of x-ray source coherence and detector resolution into the phase-retrieval formula as well. Since only a single image is needed for performing the phase retrieval by means of this new approach, we point out the great advantages of this new approach for implementation of phase tomography. We combine our phase-retrieval formula with the Feldkamp-Davis-Kresss (FDK) cone-beam reconstruction algorithm to provide a three-dimensional phase tomography formula for soft tissue objects of relatively small sizes, such as small animals or human breast. For large objects we briefly show how to apply Katsevichs cone-beam reconstruction formula to the helical phase tomography as well.. ©2005 Optical Society of America. Full Article , PDF Article ...
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Patient is aware of fee payable on the day to Taverham Dental Health Clinic- £75 OPG/ £250 CBCT scan. Our files will be exported as a DICOM file and bundled with the Sirona viewer, which can be sent electronically, posted on a USB or simply collected by your patient. Taverham Dental Health Clinic does not routinely report on CBCT scans. To comply with the IR(ME)R 2000 regulations all CBCT scans are required to be reviewed and reported in the clinical notes by the referring practitioner or by a radiologist. The operator at Taverham Dental Health Clinic will take a scan with the lowest dose, smallest field of view, and the best resolution according to the area of interest and clinical indications, in line with IR(ME)R and ALARP. The age, anatomy and physical build of the patient are all dependant factors ...
Dental cone beam CT emits less radiation and provides a more complete picture than CT and CAT scans. Hospital CTs work by taking a series of parallel X-ray images of the head, from top to bottom. That leaves gaps between each image, which have to be filled by the computers educated guesses, and that many X-rays come with a lot of radiation.. A cone beam CT circles the head, which overlaps each image or slice, leaving no gaps. The radiation is also much weaker. The most radiation hits the the area of interest, which is where the images overlap to construct the 3D model. This is how CBCT is able to provide a more complete image with less radiation exposure. ...
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diagnostic imaging method in which a computer is used to generate a three-dimensional image of the internal of an object using a series of two-dimensional X-ray image slices taken around a single axis of rotation. Cone Beam refers to the type of X-Ray projection and is important because it allows users to image a small well defined volume such as the lower face and mouth at low radiation dosage. Thats the definition, but what does it mean in the real world of dental diagnostics? One of the most important concepts to understand with Cone Beam CT is that the user is imaging a volume (like a model), not just a single plane (like a photo). However in actual use it is even better. That is because the user can not only view the model from any angle but the user can view inside the model as if the jaws and teeth were sliced with a band saw to expose a cross section. These band saw slices can be made at any angle, at any depth and can be viewed as a series of slices as if the user was slowly passing ...
For the past decade, some dental offices have changed their view of radiography, literally. Cone Beam Computerized Tomography (CBCT) scanners presented the opportunity to obtain a 3-dimensional view of the mouth, that improved diagnosis, facilitated treatment planning and enhanced opportunities for patient education. Before in-office CBCTs became available, many patients who needed 3-D scans were referred out to hospital or imaging centers to obtain medical CTs. This was not only inconvenient and time consuming, but also exposed dental patients to more radiation than was necessary for dental treatment. Recently, articles have appeared cautioning the public about the increased health risks from medical CT scans. While it is worthwhile to take precautions to avoid exposure to unnecessary radiation, it is also important to avoid confusing radiation exposure statistics of medical CTs with those of dental CBCT scans.. ...
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There is a growing interest in minimally invasive implant therapy as a standard prosthodontic treatment, providing complete restoration of occlusal function. A new treatment method (CADDIMA), which combines both computerized tomographic (CT) and optical laser-scan data for planning and design of surgical guides, implant abutments, and prosthetic devices, is described. Imaging using a NewTom 3G cone beam CT scanner and a modified laser triangulation scanner D200c is discussed, as are impression and surgical guide fabrication, which allow for flapless, precise implant placement and an accurate provisional prosthesis. The new approach gives the operator full control over the design of the implant prosthesis for planning of proper occlusal relations and shows promise for further evaluation ...
This study evaluated the potential impact of different visualisation methods of cone-beam computed tomography (CBCT) on the accuracy of linear measurements of calcified structures, and assessed their interchangeability. High resolution (0.125 mm voxel) CBCT scans were obtained from eight cadaveric heads. The distance between the alveolar bone ridge and the incisal edge was determined for all mandibular incisors and canines, both anatomically and with measurements based on the following five CBCT visualisation methods: isosurface, direct volume rendering, multiplanar reformatting (MPR), maximum intensity projection of the volume of interest (VOIMIP), and average intensity projection of the volume of interest (VOIAvIP). All radiological methods were tested for repeatability and compared with anatomical results for accuracy, and limits of agreement were established. Interchangeability was evaluated by reviewing disparities between the methods and disclosing deterministic differences. Fine intra- ...
Scattered photons highly degrade the quality of X-ray images and their effect has become more important due to the increasing interest in cone-beam geometry for the acquisition of CT (CBCT) and micro-CT data. The random nature of scatter events and the great i Scattered photons highly degrade the quality of X-ray images and their effect has become more important due to the increasing interest in cone-beam geometry for the acquisition of CT (CBCT) and micro-CT data. The random nature of scatter events and the great influence of the sample suggest that the most accurate methods for their estimation are Monte Carlo (MC) techniques, but their use is usually hampered by the large computation time required to obtain an acceptable estimation of the scattered radiation. We present an approach for scatter correction in CBCT by MC estimation, speeding up the computation by means of general purpose graphic processing units (GPGPU) and developing a framework for the automatic correction and reconstruction ...
Objective: To determine the accuracy of volumetric analysis of teeth in vivo using cone-beam computed tomography (CBCT). Materials and Methods: The physical volume (Vw) of 24 bicuspids extracted for orthodontic purposes (16 were imaged with the I-CAT and 8 with the CB MercuRay) were determined using the water displacement technique. Corresponding pretreatment CBCT image data were uploaded into Amira 4.0 for segmentation and radiographic volume (Va). All measurements were performed twice by two observers. The statistical difference between Vw and Va was assessed using a paired Hest. The intraobserver and interobserver reliability were determined by calculating Pearson correlation coefficients and intraclass correlation coefficients. Results: The overall mean Vw of teeth specimens was 0.553 +/- 0.082 cm(3), while the overall mean Va was 0.548 +/- 0.079 cm(3) (0.529 +/- 0.078 cm(3) for observer 1 and 0.567 +/- 0.085 cm(3) for observer 2). There were statistically significant differences between Va ...
Dr. Mone uses advanced dental technology including the Cone Beam CT Scan for a more precise placement of dental implants in Braintree, MA. Call to learn more!
PRIMARY OBJECTIVES:. I. Establish the technical feasibility of MRI for performing functional soft-tissue targeting of radiotherapy in the pelvis and thorax. (Group I) II. Acquire clinical MR imaging data to evaluate image quality tradeoffs and operational parameter settings. (Group I) III. Validate the selection of MRI technique factors by comparing visibility of soft tissue structures in MRIs, cone beam (CB)CTs and fan beam (FB)CTs of the same patient. (Group II) IV. Assess the feasibility of using deformable image registration to map contours from FBCT to MRI, CBCT to MRI, MRI to MRI and vice versa. (Group II) V. Compare morphologic and functional changes in target and normal structures, visualized on MRI, CBCT and FBCT images, in response to radiation therapy and identify opportunities for treatment adaptation. (Group II). OUTLINE:. Patients undergo MRI and FBCT at baseline, within the first 3 weeks of radiotherapy and between week 4 and 6 of radiotherapy. Patients with lung cancer may ...
Planmed, based in Helsinki, Finland, is releasing an upgraded new version of its popular Planmed Verity CBCT (Cone Beam Computed Tomography) extremity
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This clinical trial studies magnetic resonance imaging (MRI), cone beam computed tomography (CT), and fan beam CT in detecting soft tissue in patients w
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ll Planmeca 3D units offer premium CBCT image quality - also at a low dose. See for yourself from the examples of our clinical 3D dental images!
Intraoperative cone-beam computed tomography and multi-slice computed tomography in temporal bone imaging for surgical treatment.: CBCT provides comparable imag
Cone-beam (CB) computed tomography (CT) is widely used in the field of medical imaging for guidance. Inspired by Betrams directional interpolation (BDI) methods, directional sinogram interpolation (DSI) was implemented to generate more CB projection
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Tyler, TX (PRWEB) March 29, 2014 -- Patients of Dr. Loyd Dowd can now benefit from the detailed three-dimensional images produced by the Cone Beam CT scan
The report EMEA 3D CBCT/Cone Beam CT Systems Market by Application (Dental (Oral and Maxillofacial Surgery, Implantology, Orthodontic, Endodontic) and Non-Dental (Radiology, ENT)), End User (Hospitals and [read full press release…]. ...
CBCT in dentistry recommended uses and comparisons of the different CBCT units available. CBCT research comparing different machines.
An improved method and apparatus for preprocessing cone beam attenuation data to reconstruct a three dimensional image of a particular region of interest of an object by a process of inverse Radon transformation is described. The number of required operations is substantially reduced by selectively retaining for further processing only that cone beam attenuation data acquired within a select closed region of the surface of the array detector wherein this region provides data corresponding to beams actually attenuated in passing through the region of interest of the object. In this manner, unnecessary beam attenuation data is discarded at the earliest possible opportunity to expedite image processing.
Cone Beam Computed Tomography: We have added a new dimension in dentistry by installing a game changing imaging technology -a first of its kind in dental centre in Kerala Cone Beam Computed Tomography (CBCT). One that promises to transform the diagnosis and treatment of many dental and oral abnormalities. This new technology reduces the radiation doses to the patient when composed to the conventional CT examinations. CBCT is widely used in Oral Implant Planning and Placement.. In endodontics it increases the success rate of root canal treatments and also used for the diagnosis and treatment planning of (TMJ) Tempero Mandibular Joint Abnormalities.. ...
We are now using the latest in dental imaging technology, the i-CAT FLX, a Cone Beam 3-D dental imaging system that is capable of full 3D imaging at lower doses than traditional 2D panoramic imaging. Cone Beam technology is quickly advancing the dental industrys leading approach to treatment planning and diagnosis. With a quick scan around the patients head, CV Dental Care can now view 3-D patient anatomy to accomplish, more precise evaluation for predictable treatment results in shorter appointment times for the patient.. ...
What is Dental Cone Beam CT?. Dental cone beam computed tomography (CT) is a special type of x-ray machine used in situations where regular dental or facial x-rays are not sufficient. It is not used routinely because the radiation exposure from this scanner is significantly more than regular dental x-rays. This type of CT scanner uses a special type of technology to generate three dimensional (3-D) images of dental structures, soft tissues, nerve paths and bone in the craniofacial region in a single scan. Images obtained with cone beam CT allow for more precise treatment planning.. Metal objects, including jewelry, eyeglasses, dentures and hairpins, may affect the CT images and should be left at home or removed prior to your exam. You may also be asked to remove hearing aids and removable dental work. You may be asked to remove any piercings, if possible. Cone beam CT is not the same as conventional CT. However, dental cone beam CT can be used to produce images that are similar to those produced ...
X-ray computed tomography (CT) is instrumental in medicine, industry and homeland security, which depicts internal structures of an object from its shadows projected in a fan-beam or cone-beam from an x-ray source along a appropriate trajectory. We published the first paper on spiral conebeam CT in 1991 to solve the long object problem. Now, spiral conebeam scanning has been widely used in modern CT scanners, in which conebeam rotation and table translation are simultaneously performed, and spiral cone-beam CT remains a major area in CT research and development ...
This report (HPA-RPD-065) provides guidance on 2 important areas of radiation protection related to dental cone beam CT equipment.
Recently, several computed tomography (CT) machines with multirow detectors have been introduced on the market. Although the projections are obtained from a cone beam rather than a fan beam, multislice reconstruction algorithms in contemporary machines are firmly rooted in two-dimensional (2D) reconstruction of planar objects. Short-scan algorithms are dominating and these are preferably classified according to how redundant data are handled, using parallel rebinning, complementary rebinning, or Parker weighting. In the long run, truly 3D cone-beam algorithms are likely to take over, however. It has proved to be quite a challenge to design an algorithm that is both practical and exact under the constraints set by helical source path geometry. All attempts in this direction are readily seen to be derivatives of Grangeats algorithm. Alternative research efforts have been building on the nonexact algorithm by Feldkamp et al. (J Opt Soc Am 1: 612-619, 1984). These algorithms strive for simplicity ...
In recent years the development of cone-beam reconstruction algorithms has been an active research area in x-ray computed tomography (CT), and significant progress has been made in the advancement of algorithms. Theoretically exact and computationally efficient analytical algorithms can be found in the literature. However, in single photon emission computed tomography (SPECT), published cone-beam reconstruction algorithms are either approximate or involve iterative methods. The SPECT reconstruction problem is more complicated due to degradations in the imaging detection process, one of which is the effect of attenuation of gamma ray photons. Attenuation should be compensated for to obtain quantitative results. In this paper, an analytical reconstruction algorithm for uniformly attenuated cone-beam projection data is presented for SPECT imaging. The algorithm adopts the DBH method, a procedure consisting of differentiation and backprojection followed by a finite inverse cosh-weighted Hilbert transform.
Methods: Different kV-CBCT acquisition modes with different tube voltage (kV) and exposure (mAs) were studied: pelvis and pelvis obese with a Varian Truebeam™ (unit 1), pelvis and low dose thorax with a Varian Clinac 2100CD (unit 2). Using the TomoTherapy® Cheese phantom (Gammex RMI, Middleton, WI) for HU to electron density (de) calibration curve, and the NEMA body water phantom for HU uniformity, noise and mean water number analysis, were investigated. From the FBCT and kV-CBCT HU differential histograms, frequency peaks representing water, air, lung, soft tissue and bone were compared. Results: For unit 2, streaking and ring artifacts are much greater than for unit 1 as well as HU uniformity is deteriorated. Noise values are comparable between units but standard deviation is twice at unit 2. Peaks observed in the differential histograms are broader in kV-CBCT than those of FBCT especially for high tissue density. kV-CBCT uniformity is more degraded than in FBCT because CBCT is more ...
This report (HPA-CRCE-010) outlines measures for protection from radiation doses from dental cone beam computed tomography (CBCT) examinations.
Materials and methods Cone beam CT (CBCT) was performed using a flat panel detector angiography system. Datasets were reconstructed from 620 projection images acquired over a 200° arc (rotation time 20.7 s) at 80 kVp and a total of 260 mAs. To maximize spatial resolution, projection images were obtained using a small detector format (22 cm) and reconstructions were performed without pixel binning.. A contrast injection protocol was optimized in a porcine model for balance between stent visualization host vessel opacification. Three different intracranial stents were deployed in the internal maxillary arteries of two Yorkshire swine. Selective CBCT angiography was performed at contrast concentrations between 10 and 30% (Iopamidol 51%, by volume in normal saline) and flow rates between 0.5 and 3.5 ml/s. The CBCT datasets were reviewed and the optimal combination of parameters was used for clinical testing.. The clinical study was approved by our institutional review board. 57 CBCT examinations of ...
The BEC model was developed by the AAP to address emerging clinical topics in periodontology for which there is insufficient evidence to arrive at definitive conclusions. Using current high-quality published literature and the expert opinion of periodontal thought leaders, the BEC model aims to provide clinicians with reasonable applications of newer technologies, such as CBCT.. As new technologies emerge, it often takes many years for sufficient high-quality evidence to allow clinicians to appropriately incorporate the technology into patient care, said Kenneth Kornman, DDS, PhD, editor of the Journal of Periodontology. The BEC reports are designed to bridge the gaps and provide evidence summaries and expert interpretations that guide clinical use now. We anticipate that the BEC reports will help us apply new technologies in a focused manner to help improve the health of our patients.. Introduced just over 20 years ago, CBCT technology provides a beneficial tool for periodontists to use in ...
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A new method to reduce artifacts (MAR), produced by high-density objects, especially metal implants (MI), in X-ray CBCT is presented. MIs located in the field of view (FOV) result in artifacts influencing clinical diagnostics and treatments. The novel method reduces metal artifacts by virtually replacing MIs by tissue objects of the same shape. This corrected data can be reconstructed with significantly reduced artifacts. After reconstruction, the segmented 3D MIs were re-inserted into the corrected 3D volume. The method was developed for mobile C-arm CBCTs, where misalignments between original 2D data and forward projections must be adjusted before correction ...
Cone Beam CT of the Head and Neck An Anatomical Atlas PDF Download | Chung How Kau, Kenneth Abramovitch, Sherif Galal Kamel, Marko Bozic Cone Beam CT of the Head and Neck presents normal anatomy of the head using photographs of cadavers
WaterMed provides quality and cheap dental x-ray machine. All CBCT machine enjoys excellent technical support. The portable dental x-ray machine is hot-selling for its features, while The dental x-ray unit is well-known for its cost performance.
Materials and methods: Two registration methods based on optical flow estimation have been programmed to run on a graphics programming unit (GPU). One of these methods by Horn & Schunck is tested on a 4DCT thorax data set with 10 phases and 41 landmarks identified per phase. The other method by Cornelius & Kanade is tested on a series of six 3D cone beam CT (CBCT) data sets and a conventional planning CT data set from a head and neck cancer patient. In each of these data sets 6 landmark points have been identified on the cervical vertebrae and the base of skull. Both CBCT to CBCT and CBCT to CT registration is performed. Results: For the 4DCT registration average landmark error was reduced by deformable registration from 3.5 ± 2.0 mm to 1.1 ± 0.6 mm. For CBCT to CBCT registration the average bone landmark error was 1.8 ± 1.0 mm after rigid registration and 1.6 ± 0.8 mm after deformable registration. For CBCT to CT registration errors were 2.2 ± 0.6 mm and 1.8 ± 0.6 mm for rigid and deformable
Due to low radiation dose, cone-beam computed tomography is growing in importance. In image reconstruction, a stack of cross-sectional images can be recons
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Planmeca MAKES STRATEGIC INVESTMENT IN E4D TECHNOLOGIES. Helsinki, Finland, December 23, 2013 - Planmeca, the worlds largest privately owned dental imaging company and equipment manufacturer, announced today that it has made a non-controlling, strategic investment in E4D Technologies, LLC, developer of the E4D CAD/CAM Restorative System. This strategic investment reinforces Planmecas on-going commitment to help dental providers improve patient care by offering a comprehensive portfolio of integrated digital dental solutions for dentists and dental laboratories.. Planmeca will co-develop CAD/CAM products with E4D Technologies and offer these products in North America under the brand names Planmeca PlanScan-E4D Technologies and PlanMill-E4D Technologies. Henry Schein, Inc. will continue to be the exclusive distributor in the U.S., Canada, Australia, and New Zealand. In addition, Planmeca will expand distribution of the E4D system to more than 120 additional international markets under the ...
In point-based rigid-body registration, target registration error (TRE) is an important measure of the accuracy of the performed registration. The registrations accuracy depends on the fiducial localization error (FLE) which, in turn, is due to the
Compressive Sensing (CS) theory has great potential for reconstructing Computed Tomography (CT) images from sparse-views projection data and Total Variation- (TV-) based CT reconstruction method is very popular. However, it does not directly incorporate prior images into the reconstruction. To improve the quality of reconstructed images, this paper proposed an improved TV minimization method using prior images and Split-Bregman method in CT reconstruction, which uses prior images to obtain valuable previous information and promote the subsequent imaging process. The images obtained asynchronously were registered via Locally Linear Embedding (LLE). To validate the method, two studies were performed. Numerical simulation using an abdomen phantom has been used to demonstrate that the proposed method enables accurate reconstruction of image objects under sparse projection data. A real dataset was used to further validate the method.
The gentle spirit of Michiko Mary Morita, beloved wife, mother, and grandmother, passed from this earth on July 16, 1998. She was born on March 4, 1914 in Kumamoto, Japan, to Saburo Ogata and Tsumo Kazoye. She attended school in Los Angeles, California. On October 10, 1936 she married her high school sweetheart, Mino Minori Morita. They moved to Salt Lake City, Utah in 1941 and have resided here ever since. She was a professional seamstress for 60 years.
INTRODUCTION: The purpose of this study was to propose a protocol for safe bicortical placement of mini-implants by measuring the interradicular spaces of the maxillary teeth and the bone quality.. METHODS: Cone-beam computed tomography data were obtained from 50 adults. Three-dimensional reconstructions and measurements were made with SimplantPro software (Materialise, Leuven, Belgium). For each interradicular site, the bone thicknesses and interradicular distances at the planes 1.5, 3, 6, and 9 mm above the cementoenamel junction were measured. Standard bone units were defined to evaluate the influences of bone density and the different placement patterns on the stability of the mini-implants.. RESULTS: The safe interradicular sites in the maxilla for bicortical placement of 1.5-mm-diameter mini-implants were in all planes between the first and second premolars, and between the second premolar and the first molar. The safe palatal sites were between the first and second molars, and the safe ...
PLX3000A Panoramic Imaging Digital CBCT Dental system Usage of PLX3000A dental CBCT system with 3D imaging system PLX3000A is widely used for dental CT diagnostic with 12cm*15cm flat panel detector, mainly for oral and maxillofacial surgeries,...
To provide a comprehensive assessment of patient setup accuracy in 6 degrees of freedom (DOFs) using 2-dimensional/3-dimensional (2D/3D) image registration with on-board 2-dimensional kilovoltage (OB-2DkV) radiographic images we evaluated cranial head and neck KN-93 (HN) and thoracic and abdominal sites KN-93 under clinical conditions. axis. The windows/level adjustments for optimal visualization of the bone in OB-2DkV and DRRs were performed prior to registration. Ideal patient alignment at the isocenter was calculated and used as an initial registration position. In 3D/3D registration cone-beam CT (CBCT) was aligned to simCT on bony structures using a bone density filter in 6DOF. Included in this retrospective study were 37 patients treated in 55 fractions with frameless stereotactic radiosurgery or stereotactic body radiotherapy for cranial and paraspinal cancer. A cranial phantom was used to serve as a control. In all cases CBCT images were acquired for patient setup with subsequent OB-2DkV ...
Quantitative three-dimensional assessment of buccal alveolar bone thickness with dental cone-beam computed tomography, Salmeh Kalbassi, Foong Weng Chiong, Hwang Yee Cheau, Wong Hun
was created late 2016 to investigate the potential of the technology, to test and validate research hypotheses and to promote the use of validated measurement methods. The CBCT scanner is mounted on a C-arm in the IR suite, which offers real time imaging with a stationary patient. This eliminates the time needed to transfer a patient from the angiography suite to a conventional computed tomography scanner and facilitates a broad spectrum of applications of CBCT during IR procedures. The clinical applications of CBCT in IR include treatment planning, device or implant positioning and assessment, intra-procedural localization, and assessment of procedure endpoints. CBCT is useful as a primary and supplemental form of imaging. It is an excellent adjunct to DSA and fluoroscopy for soft tissue and vascular visibility during complex procedures. The use of CBCT before fluoroscopy potentially reduces patient radiation exposure. Chemoembolization for Hepatocellular Carcinoma: CBCT with contrast confirms ...
PubMed journal article A Cone-Beam Computed Tomographic Study on Mandibular First Molars in a Chinese Subpopulatio were found in PRIME PubMed. Download Prime PubMed App to iPhone or iPad.
In this work several algorithms for diaphragm detection in 2D views of cone-beam computed tomography (CBCT) raw data are developed. These algorithms are tested on 21 Siemens megavoltage CBCT scans of lungs and the result is compared against the diaphragm apex identified by human experts. Among these algorithms dynamic Hough transform is sufficiently quick and accurate for motion determination prior to radiation therapy. The diaphragm was successfully detected in all 21 data sets, even for views with poor image quality and confounding objects. Each CBCT scan analysis (200 frames) took about 38 seconds on a 2.66 GHz Intel quad-core 2 CPU. The average cranio-caudal position error was 1.707 ± 1.117 mm. Other directions were not assessed due to uncertainties in expert identification.
Villa Verde hospital invests in technology and expertise in order to enhance their services to citizens and professionals.. Finally, also in Reggio Emilia it is possible to perform a 1.5 Tesla MRI using the latest fully digitized equipment. This equipment features innovative technology, tunnels wider and shorter than the previous generation of instruments and is considerably less noisy.. This type of non-invasive instrument can display with extreme precision the nervous system, skeleton, joints and internal organs without the use of radiation. A few days ago the Villa Verde polyclinic hospital - a healthcare provider of the national health system - started using their 1.5 Tesla machine, one of the most modern and technical advanced on the market today to perform comprehensive examinations with significantly better image quality, opening new horizons for clinical applications for organ systems that were difficult to evaluate before.. The Radiology staff of Villa Verde polyclinic hospital has also ...
Implant placing procedure. During the first meeting, the correct diagnosis is established based on CBCT scans or digital orthopan images, and a thorough specialist examination is performed. The patient is presented with the various dental care solutions of the situation at hand, taking into account his or her wishes.. The next stage after the clinical inspection is the planning of oral rehabilitation or the implanting intervention itself and familiarising the patient with the procedures.. The intervention is quick and painless - it takes approximately 20 minutes under local anaesthesia. The surgeon places a titanium screw into the jawbone, sutures the wound and lets the implant to bond (osseointegrates) with the bone.. The time to heal depends on the state of the patients bones and complexity of the intervention, but it usually takes from 3 to 6 months. During this period, a temporary crown or teeth can be made upon the patients request. When the bone heals, we proceed and manufacture the ...
Methods: CBCT images are commonly degraded by scattered radiations originating in the patient's body, and so the CT numbers of the CBCT images depend on data acquisition conditions and the patient size. However, the anatomical shape of each organ is not likely affected by scattered radiations, and so we used only the shape of major organs such as lungs and bones in the CBCT images, and replaced these CT numbers with those of the multi-slice CT (MSCT) images that were used for dose calculation in a treatment planning. As regards this alternative CT number we adopted the median of MSCT numbers in a segmented region of a major organ each corresponding to that in the CBCT images. We evaluated the validity of our segmented region (SR) method with images of eight patients with lung diseases. The number of irradiation beams was four. In this evaluation we used the distance-to-agreement (DTA) and γ analysis, and the dose-volume-histogram (DVH) analysis ...
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20. Introduction to Cone Beam Computed Tomography. Ernest W. N. Lam. This technology, first described in 1998 for applications in dentistry (Mozzo et al., 1998), employs a cone-shaped X-ray beam emanating from a point source coupled with a planar digital sensor. During image acquisition, both the radiation source and sensor rotate around the patient, who is stationary. There are two classes of cone beam systems currently, ones that employ small fields of view with dimensions of less than 8 cm, and large fields of view with dimensions of greater than 8 cm upward to 30 cm.. Unlike intraoral digital imaging, the anatomy of the area imaged is recreated in three dimensions rather than two. The three-dimensional (3D) elements that recreate the anatomy are referred to as cube-shaped volume elements or voxels. Small field of view systems (Figure 20.1) employ pixel dimensions as low as 0.076 mm while the larger field machines employ pixel dimensions of between 0.20 mm and 0.40 mm.. ...
There is strong evidence to support the hypothesis that increasing radiation dose to the prostate will increase the probability of cure. A major difficulty in pursuing dose escalation is the toxicity induced in the surrounding normal tissues. These normal tissues are irradiated as a consequence of planning margins used to guarantee the delivery of the prescribed dose to the entire clinical target volume prostate and seminal vesicles. The margins are constructed from clinical knowledge of uncertainties in daily patient positioning and organ motion. In these investigations, a new imaging technology, cone-beam computed tomography CT was developed to localize the prostate and surrounding tissues on a daily basis, allowing the radiation field to be applied with great precision. By increasing precision, more conformal treatment fields can be applied, reducing the dose to surrounding normal tissues and allowing the safe pursuit of dose escalation. This new imaging modality, flat-panel based cone-beam CT, has
Introduction Since the first introduced use of cone beam computed tomography (CBCT) in the maxillo¬facial region it has been increasingly popular. In contrast to 2D imaging modalities such as periapical and panoramic radiographic techniques, CBCT provides some valuable information from...
Press release - Transparency Market Research - Cone Beam Computed Tomography (CBCT) Market - Positive long-term growth outlook 2023 - published on openPR.com
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An X-ray projection exposure apparatus includes a mask stage configured to hold a mask having a predetermined pattern thereon, a substrate stage configured to hold a substrate, and an X-ray source that emits exposing X-rays and detection light having a wavelength different from the exposing X-rays for use in detecting a position of at least one of the mask and the substrate. The apparatus further includes an X-ray illumination optical system configured to direct the exposing X-rays and the detection light towards the mask, an X-ray projection and focusing optical system for receiving the exposing X-rays that have interacted with the mask, and projecting and focusing an image of the predetermined pattern on the mask onto the substrate, and a detector for detecting the detection light that has interacted with the mask to derive the position of the at least one of the mask and the substrate.
Cleveland, OH (PRWEB) February 12, 2015 -- Plexar Associates, Inc. announces the completion and peer review submittal of a detailed compilation report:
Despite Dr. Christensens blunt evaluation of the state of the U.S. implant business, the atmosphere throughout the discussion that followed was that of a lively and cordial scholarly debate, peppered with humorous asides. When the efficacy of mini-implants was being discussed, M. Nader Sharifi, DDS, expressed his approval for the devices accordingly: Theres a risk of dropping the tiny screw into the patients mouth, but the greatest risk is dropping it on the floor, asking the staff to bring it into sterilization, and then requesting the other one.. Through it all, Dr. Christensen, who practices in a predominantly lower-income region, kept the dialogue rooted in actionable solutions. Were back to boutique dentistry. Lets talk about real people, he chided one panelist.. Balancing those realms drove the discussion about the usage of cone-beam CT (CBCT) for even a single implant. While the panel agreed that CBCT allows for a more informed procedure, only about five of the roughly three ...
H. Salehi, M. Mahdian, H. Alnajjar, and A. Tadinada, Utilizing Optical Coherence Tomography and Cone Beam Computed Tomography for Oral Tissues Characterization: ex vivo Study, in Biomedical Optics 2016, OSA Technical Digest (online) (Optical Society of America, 2016), paper JTu3A.52 ...
Authors: Jorge NR Martins, Moataz-Bellah AM Alkhawas, Zaher Altaki, Gianmarco Bellardini, Luiza Berti, Carlos Boveda, Antonis Chaniotis, Daniel Flynn, Jose Antonio Gonzalez, Jojo Kottoor, Miguel Seruca Marques, Adam Monroe, Hani F Ounsi, Peter Parashos, Gianluca Plotino, Magnus E Ragnarsson, Ruben Rosas Aguilar, Fabio Santiago, Hussein C Seedat, Walter Vargas, Murilo von Zuben, Yuerong Zhang, Yongchun Gu, Antonio Ginjeira
Cone beam computed tomography imaging represents a paradigm shift for enhancing diagnosis and treatment planning. Questions regarding cone beam computed tomographys associated legal responsibility are addressed, including cone beam tomography necessity, recognition of pathosis in the scans entire volume, adequate training, informed consent and/or refusal and current court status of cone bean computed tomography. Judicious selection and prudent use of cone beam computed tomography technology to protect and promote patient safety and efficacious treatment complies with the standard of care.. ...
CBVT, or Cone Beam Volumetric Tomography, is a compact, fast and safe way of acquiring 3D dental imaging. No appointment needed, just bring your referral.
October 9, 2008 -- X-ray imaging in dentistry is rapidly moving toward 3D, and it is time for general dentists to take note. The first FDA-approved cone-beam CT (CBCT) system was in the year 2000, but since that time many competitors have entered the marketplace. Discuss ...
Fingerprint Dive into the research topics of Diagnostic accuracy studies needed for cone beam computed tomography. Together they form a unique fingerprint. ...
Cone Beam Computed Tomography. Semin Orthod 2009;15:1-84. Lemke HU, Vannier MW, Inamura K, Farman AG, Doi K (editors). Computer ... Farman is founder and chair of the International Congress on Computed Maxillofacial Imaging (CMI) that has its 17th Annual ...
Flat panel cone beam computed tomography of the sinuses. Otolaryngol Head Neck Surg. 2009 Jun;140(6):841-4. Zoumalan RA, Carron ... "Flat panel cone beam computed tomography of the sinuses". Otolaryngology-Head and Neck Surgery. 140 (6): 841-844. doi:10.1016/j ...
Cone beam computed tomography (CBCT) is useful in diagnosing DI. It provides clinicians a detailed 3D image and could aid ... "Diagnosis and endodontic treatment of type II dens invaginatus by using cone-beam computed tomography and splint guides for ...
"Comparison of gray values of cone-beam computed tomography with hounsfield units of multislice computed tomography: An in vitro ... Cone beam computed tomography: Bone density and the Hounsfield scale. Feeman, Timothy G. (2010). The Mathematics of Medical ... HU applies to medical-grade dual-energy CT scans but not to cone beam computed tomography (CBCT) scans. Values reported here ... De Vos, W.; Casselman, J.; Swennen, G.R.J. (June 2009). "Cone-beam computerized tomography (CBCT) imaging of the oral and ...
Radiation Oncology: Medical imaging, 4D Cone beam computed tomography, 4D MRI. Radiology: Computer-Aided Diagnosis, Distributed ... and Ubiquitous computing. Robotics Machine Learning Data Science Medical Imaging "Yuichi Motai - Personal". People.vcu.edu. ... Fundamentals of robotic vision and data-intensive computing. Adaptive Prediction: Kalman filter bank, Optimized prediction, ...
Patel, S.; Brown, J.; Pimentel, T.; Kelly, R. D.; Abella, F.; Durack, C. (2019). "Cone beam computed tomography in Endodontics ...
Mah, P.; Reeves, T. E.; McDavid, W. D. (2010). "Deriving Hounsfield units using grey levels in cone beam computed tomography". ... Cybermed has become the first in the world to introduce cone beam CT image processing software as well as first in Korea to ... "Anthropometric analysis of maxillary anterior buccal bone of Korean adults using cone-beam CT". The Journal of Advanced ...
... cone-beam computed tomography (CBCT) and computed tomography (CT) data sets. The purpose of the tool is to make it easy for ... "Image analysis and superimposition of 3-dimensional cone beam computed tomography models". American Journal of Orthodontics and ...
"Cone-beam computed tomography with a flat-panel imager: Initial performance characterization". Medical Physics. American ...
Cone beam computed tomography[edit]. Cone beam computed tomography (CBCT), also known as digital volume tomography (DVT), is a ... Drage N (March 2018). "Cone Beam Computed Tomography (CBCT) in General Dental Practice". Primary Dental Journal. 7 (1): 26-30. ... Estrela C, Bueno MR, Leles CR, Azevedo B, Azevedo JR (March 2008). "Accuracy of cone beam computed tomography and panoramic and ... Pelekos G, Acharya A, Tonetti MS, Bornstein MM (May 2018). "Diagnostic performance of cone beam computed tomography in ...
Curveball, a music festival hosted by the band Phish Cone Beam (especially CBCT; Cone beam computed tomography) This ...
Using cone beam computed tomography, the patient and the existing prosthesis are being scanned. Furthermore, the prosthesis ... Image-guided surgery and CAS in ENT commonly consists of navigating preoperative image data such as CT or cone beam CT to ... Intraoperative navigation in the maxillofacial area based on 3D imaging obtained by a cone-beam device. Int J Oral Maxillofac ... Where necessary, the transition of the gold cone caps to the mucosa can be isolated with rubber dam rings. The new prosthesis ...
Shukla, S; Chug, A; Afrashtehfar, K. I (2017). "Role of Cone Beam Computed Tomography in Diagnosis and Treatment Planning in ... Newer technologies are available (e.g. cone-beam CT scanning) that allow more efficient, scientific measurements to be taken of ... The standard endodontic technique involves inserting a gutta-percha cone (a "point") into the cleaned-out root canal along with ...
The most ideal way to evaluate the bone is by a cone beam computed tomography (CBCT) scan. The All-on-4 protocol is for at ...
Now, with the introduction of cone beam computed tomography (CBCT), it is possible to view root fractures three-dimensionally. ...
A Cone-beam Computed Tomography Study". Journal of Endodontics. 42 (4): 538-41. doi:10.1016/j.joen.2015.12.026. PMID 26873567. ... Recent studies have shown that use of cone-down CT scans can detect accessory canals that would have been missed in 23% of ...
An example of IGRT would include localization of a cone beam computed tomography (CBCT) dataset with the planning computed ... Cone-beam computed tomography (CBCT) based image guided systems have been integrated with medical linear accelerators to great ... Megavoltage computed tomography (MVCT) is a medical imaging technique that uses the Megavoltage range of X-rays to create an ... Cone beam CT acquires many projections over the entire volume of interest in each projection. Using reconstruction strategies ...
2017). Isolated tympanic plate fracture detected by cone-beam computed tomography: report of four cases with review of ... "The identification of mandible fractures by helical computed tomography and panorex tomography". The Journal of Craniofacial ... Research has shown that panoramic radiography is similar to computed tomography in its diagnostic accuracy for mandible ... Computed tomography is the most sensitive and specific of the imaging techniques. The facial bones can be visualized as slices ...
... of root anatomy of permanent mandibular premolars and molars in a Korean population with cone-beam computed tomography." ...
Industrial CT Scanning Radiology Computed Tomography Medical Imaging Cone beam reconstruction Flat-panel volume CT: fundamental ... The x-ray beam used in volume CT is cone shaped, in contrast to the fan shaped beam of the regular CT scanner. This cone shape ... Flat-panel Volume CT is a technique under development to make computed tomography images with improved performance (in ... allows the beam to cover the two-dimensional detector panel. ...
A cone-beam computed tomography study in a northern Taiwanese population". Journal of Dental Sciences. 13 (2): 138-144. doi: ...
Intraoperative acquisition of a cone beam computed tomography image can also be used to reconstruct three dimensional CT-like ... Among the former is beam hardening. Among the latter are frame rate settings, pulsed fluoroscopy and collimation. Beam ... X-ray computed tomography (CT) scanners or magnetic resonance imaging (MRI) scanners. These imaging devices enable minimally- ... It is not possible to perform surgery in a regular magnetic resonance tomography room. Thus for step 2, there are two ways to ...
The feasibility of using cone beam computed tomography to diagnose ankylosed teeth is also explored and discussed in a recent ... cone beam computed tomography, and histological data: a retrospective observational case series study". European Journal of ... Diagnostic methods of tooth ankylosis include the use of clinical examinations, x-ray and cone beam computerized tomography ( ... cone beam computerized tomography (CBCT) is adopted to provide a 3-dimensional image for better clinical inspection of ...
Cone Beam Computed Tomography in Dental Education: A Survey of U.S., U.K., and Australian Dental Schools, Parashar et al., ... Allan G. Farman - Oral and Maxillofacial Radiologist and Professor Computed radiography Dental radiography Digital radiography ...
The introduction of cone beam computed tomography (CBCT) imaging allowed a lower radiation dose to patients, in comparison to ... Hintze H, Wiese M, Wenzel A (May 2007). "Cone beam CT and conventional tomography for the detection of morphological ... for detecting osseous abnormalities of the temporomandibular joint and its correlation with cone beam computed tomography". ... Studies have shown that tomography of the TMJ provided supplementary information that supersedes what is obtainable from ...
Three-dimensional localization of maxillary canines with cone-beam computed tomography. Am J of Orthod Dentofacial Orthop. 2005 ... Radiation Protection No172 - Cone Beam CT for dental and maxillofacial radiology (Evidence-based guidelines). Luxembourg: ... Ericson, S. Bjerklin, K. Falahat, B. Does the canine dental follicle cause resorption of permanent incisor roots? A computed ... Ericson S, Kurol J. Incisor root resorptions due to ectopic maxillary canines imaged by computerized tomography: a comparative ...
Data from Cone Beam Computed Tomography (CBCT) helps to create an accurate surgical template, thereby enhancing the success of ...
... uses digital images of a patient's mouth and teeth using either a white light scanner or cone beam computed tomography (CBCT). ...
Cone beam computed tomography (CBCT) systems for image-guided radiation therapy (IGRT). Cone beam computed tomography (CBCT) ... Cone beam computed tomography (CBCT) systems on mobile C-arms for image-guided surgery. Cone beam computed tomography (CBCT) ... cone beam computed tomography (CBCT), and computed tomography (CT) systems; image-guided surgery; multi-modality medical image ... John Wong on the topic of cone beam computed tomography (CBCT) for image-guided radiation therapy (IGRT). The Beaumont team ...
3D rendering of a computed tomography scan of a leaf. Leaves are the most important organs of most vascular plants.[8] Green ... On the other hand, I-beam leaves such as Banksia marginata involve specialized structures to stiffen them. These I-beams are ... Leaves are the fundamental structural units from which cones are constructed in gymnosperms (each cone scale is a modified ... Read and Stokes (2006) consider two basic models, the "hydrostatic" and "I-beam leaf" form (see Fig 1).[40] Hydrostatic leaves ...
In computed tomography (CT scanning) an X-ray source and its associated detectors rotate around the subject which itself moves ... This is determined by the area of the electron beam hitting the anode. A large photon source results in more blurring in the ... Computed tomography or CT scan (previously known as CAT scan, the "A" standing for "axial") uses ionizing radiation (x-ray ... In medicine and dentistry, projectional radiography and computed tomography images generally use X-rays created by X-ray ...
Medical imaging of radioisotopes and external beam radiotherapy[edit]. Cherenkov light emission imaged from the chest wall of a ... This light cone is detected on a position sensitive planar photon detector, which allows reconstructing a ring or disc, the ... If the momentum of the particle is measured independently, one could compute the mass of the particle by its momentum and ... "Cerenkov Luminescence Tomography for In Vivo Radiopharmaceutical Imaging". International Journal of Biomedical Imaging. 2011 ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ...
Computed tomography of the head. *Quantitative computed tomography. *Spiral computed tomography. *High resolution CT ... Starting 1985: Laser point scanners with beam scanning[edit]. In the mid-1980s, William Bradshaw Amos and John Graham White and ... In this technique the cone of illuminating light and detected light are at an angle to each other (best results when they are ... The beam is scanned across the sample in the horizontal plane by using one or more (servo controlled) oscillating mirrors. This ...
Retsky, Michael (31 July 2008). "Electron beam computed tomography: Challenges and opportunities". Physics Procedia. 1 (1): 149 ... Bhowmik, Ujjal Kumar; Zafar Iqbal, M.; Adhami, Reza R. (28 May 2012). "Mitigating motion artifacts in FDK based 3D Cone-beam ... For non-medical computed tomography, see industrial computed tomography scanning. For non-X-ray tomography, see Tomography. ... X-ray computed tomography (X-ray CT), computerized axial tomography scan (CAT scan),[2] computer aided tomography, computed ...
CBCT - počítačová tomografia na princípe kužeľovitého zväzku lúčov (Cone Beam Computed Tomography) ... Cone Beam Computed Tomography) je relatívne novým typom CT s nízkou radiačnou záťažou porovnateľnou s konvenčnými RTG snímkami ... electron-beam computed tomography) je osobitným typom počítačovej tomografie. Rozdiel je v tom, že zdrojom röntgenového ... Computed (axial) Tomography, skr. CT) je rádiologická vyšetrovacia metóda, ktorá pomocou röntgenového žiarenia umožňuje ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ... Single Photon Emission Computed Tomography). Another medical scintillography technique, the Positron-emission tomography (PET ... In contrast, SPECT and positron emission tomography (PET) form 3-dimensional images, and are therefore classified as separate ... based on scintillography in Positron-Emission Tomography ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ... Analytical techniques, much like the reconstruction of computed tomography (CT) and single-photon emission computed tomography ... In modern PET computed tomography scanners, three-dimensional imaging is often accomplished with the aid of a computed ... 2010). "Clinical value of 18F-fluorodihydroxyphenylalanine positron emission tomography/computed tomography (18F-DOPA PET/CT) ...
Operation of computed tomography#Tomographic reconstruction. *Cone beam reconstruction. *Industrial CT scanning ... Fan-Beam Reconstruction[edit]. Use of a noncollimated fan beam is common since a collimated beam of radiation is difficult to ... Parallel beam geometry utilized in tomography and tomographic reconstruction. Each projection, resulting from tomography under ... A notable example of applications is the reconstruction of computed tomography (CT) where cross-sectional images of patients ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ... A radiation source is positioned behind the patient at a standard distance (most often 6 feet, 1,8m), and the x-ray beam is ... In a posteroanterior (PA) view, the x-ray source is positioned so that the x-ray beam enters through the posterior (back) ... In anteroposterior (AP) views, the positions of the x-ray source and detector are reversed: the x-ray beam enters through the ...
The introduction of cone beam computed tomography (CBCT) imaging allowed a lower radiation dose to patients, in comparison to ... for detecting osseous abnormalities of the temporomandibular joint and its correlation with cone beam computed tomography". ... Hintze H, Wiese M, Wenzel A (May 2007). "Cone beam CT and conventional tomography for the detection of morphological ... Computerised tomography (CT)Edit. Studies have shown that tomography of the TMJ provided supplementary information that ...
Talk:Cone beam computed tomography. *Talk:Cone beam computerized tomography. *Talk:Congenital epulis ...
Cone beam computed tomography. *Configuration factor. *Coupland's elevators. D. *Dahl appliance. *Dahl effect ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ... For non-medical computed tomography, see industrial computed tomography scanning. For non-X-ray tomography, see Tomography. ... X-ray computed tomography (X-ray CT), computerized axial tomography scan (CAT scan),[1] computer aided tomography, computed ... "computed tomography" could be used to describe positron emission tomography or single photon emission computed tomography ( ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ... as it has been made obsolete with improvements in computed tomography and bronchoscopy. ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ...
Other imaging technologies such as quantitative computed tomography (QCT) are capable of measuring the bone's volume, and are, ... Two X-ray beams, with different energy levels, are aimed at the patient's bones. When soft tissue absorption is subtracted out ... A single X-ray beam passing through the body will be attenuated by both soft tissue and bone, and it is not possible to ... the bone mineral density (BMD) can be determined from the absorption of each beam by bone. Dual-energy X-ray absorptiometry is ...
Computed Corpuscle Sectioning. *Crowther criterion. *Dose-fractionation theorem. *Cone beam reconstruction. *CONN (functional ... Neutron stimulated emission computed tomography. *Non-contact thermography. O. *Ordered subset expectation maximization ...
... Tomography (APT)[edit]. Modern day atom probe tomography (APT) uses a position-sensitive detector to deduce the ... Whilst the uncertainty in the atomic mass computed by time-of-flight methods in atom probe is sufficiently small to allow for ... A counter electrode that can be a simple disk shape (like the EIKOS™, or earlier generation atom probes), or a cone shaped ... Site specific preparation methods, e.g. using Focussed ion beam preparation, although more time-consuming, may be used to ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ... Fluoroscopy is similar to radiography and X-ray computed tomography (X-ray CT) in that it generates images using X-rays. The ...
Conductivity of transparency Conductor gallop Cone beam computed tomography Configuration interaction Configuration space ... Computational geophysics Computational magnetohydrodynamics Computational physics Computed radiography Computed tomography ... Chemical affinity Chemical beam epitaxy Chemical force microscopy Chemical ionization Chemical laser Chemical oxygen iodine ... quantum computing) Concurrence principle Condensation Condensation (aerosol dynamics) Condensed Matter Condensed matter physics ...
Cone beam computed tomography (or CBCT, also referred to as C-arm CT, cone beam volume CT, flat panel CT or Digital Volume ... "Cone Beam-Computed Tomography in Endodontics" (PDF). www.aae.org. Summer 2011. Retrieved October 21, 2019. New AAOMR Guidelines ... Computed tomography Cone beam reconstruction Technical Description of CBCT from University of Manchester. Citing: Scarfe WC, ... Grünheid T, Kolbeck Schieck JR, Pliska BT, Ahmad M, Larson BE (April 2012). "Dosimetry of a cone-beam computed tomography ...
Cone-beam computed tomography systems (CBCT) are a variation of traditional computed tomography (CT) systems. The CBCT systems ... The use of cone-beam computed tomography in dentistry: *The joint FDA and American Dental Association Guidelines for the ... information about the use of cone-beam computed tomography in dentistry particularly in the pediatric population, ... parents and health care providers to help reduce unnecessary radiation exposure from dental cone-beam computed tomography, and ...
Cone-beam computed tomography or conventional radiography for localising of maxillary impacted canines? *Niloufar Amintavakoli ... Cone beam computed tomography in pre-surgical assessment of mandibular third molars *Patrick A Fee ... Book review: Cone beam computed tomography in orthodontics: indications, insights and innovations *J. Murphy ... Automatic analysis algorithm for acquiring standard dental and mandibular shape data using cone-beam computed tomography *Jae ...
... an X-ray beam in the form of a cone (hence the name) is applied, and during the scan, a certain volume is imaged, which is used ... In cone beam computed tomography (CBCT), an X-ray beam in the form of a cone (hence the name) is applied, and during the scan, ... Evaluation of the effective dose of cone beam computed tomography and multi-slice computed tomography for temporomandibular ... Liu L, Li J, Ji H, Zhang N, Wang Y, Zheng G, Wang H, Luo E. Cone-beam computed tomography evaluation of the maxillofacial ...
Dental cone-beam computed tomography (CBCT) received regulatory approval in Japan in 2000 and has been widely used since being ... Comparative study of jaws with multislice computed tomography and cone-beam computed tomography. Radiol Med. 2010;115:600-11. ... Comparative dosimetry of dental cone beam computed tomography, panoramic radiography, and multislice computed tomography. Oral ... Dosimetry and image quality of four dental cone beam computed tomography scanners compared with multislice computed tomography ...
Cone-Beam Computed Tomography (Cone-Beam CT) was developed in the 1990s and it is an addition to the imaging armamentarium for ... Concrescence: Cone-Beam Computed Tomography Imaging Perspective. Ali Zakir Syed,1 LeelaSubhashini Choudary Alluri,1 Dhiraj ... Cone-Beam CT eliminates these limitations. The aim of this article was to describe a case of dental abnormality using Cone-Beam ... "Incidental occurrence of an unusually large mastoid foramen on cone-beam computed tomography and review of the literature," ...
... Veeratrishul Allareddy,1 Steven D. Vincent,1 John W. Hellstein,1 ... Cone beam computed tomography (CBCT) has gained widespread acceptance in dentistry for a variety of applications. Most dentists ... To overcome some of the above limitations cone beam computed tomography (CBCT) for the jaws was developed in the 1990s and is ... W. C. Scarfe, A. G. Farman, and P. Sukovic, "Clinical applications of cone-beam computed tomography in dental practice," ...
INTERNATIONAL ATOMIC ENERGY AGENCY, Status of Computed Tomography Dosimetry for Wide Cone Beam Scanners, Human Health Reports ... This publication supports an interim solution to the dosimetric problems caused by modern computed tomography (CT) equipment, ... particular with respect to the wide X ray beam angles increasing seen in clinical practice. It reviews the development of ... methodologies and presents practical measurement guidance in the implementation of new dosimetric methods needed with wide beam ...
Cone beam computed tomography in endodontic}. author = {Durack, Conor, and Patel, Shanon}. abstractNote = {Cone beam computed ... Cone beam computed tomography (CBCT) is a contemporary, radiological imaging system designed specifically for use on the ... Cone beam computed tomography in endodontic. Brazil: N. p., 2012. Web. doi:10.1590/S0103-64402012000300001. ... "Cone beam computed tomography in endodontic." Brazil. doi:10.1590/S0103-64402012000300001. https://www.osti.gov/servlets/purl/ ...
... long-term growth outlook 2023 - published on openPR.com ... Cone Beam Computed Tomography (CBCT) is variation on conventional Computed Tomography (CT). "Cone beam" refers to the cone ... Cone beam computed tomography (CBCT) system is a special type of x-ray equipment that provides 3-D views for more thorough ... Cone Beam Computed Tomography (CBCT) Market - Positive long-term growth outlook 2023. 07-10-2017 02:00 PM CET , Health & ...
... is an innovative medical imaging technique that provides ... The Impact of Cone Beam Computed Tomography in Endodontics: A New Era in Diagnosis and Treatment Planning (Spring 2018 ... Cone Beam Computed Tomography in Endodontics (Summer 2011 ENDODONTICS: Colleagues for Excellence) ... AAE/AAOMR Revised Joint Position Statement on Cone Beam Computed Tomography in Endodontics ...
Whats driving the Cone Beam Computed Tomography (CBCT) market Growth? By Manufacturers: NEWTOM, Planmeca, Prexion, Carestream ... Cone Beam Computed Tomography Market Size, Share, Analysis & Forecast The trend in the global cone beam computed tomography ( ... 3.3.2 Cone Beam Computed Tomography (CBCT) Product Category, Application and Specification. 3.3.3 NEWTOM Cone Beam Computed ... 3.4.2 Cone Beam Computed Tomography (CBCT) Product Category, Application and Specification. 3.4.3 Planmeca Cone Beam Computed ...
... "computed tomography", and "cone beam computed tomography". Studies on diagnosis of ankylosis using CT are limited (Kitai et al ... study for image quality and radiation dose of a cone beam computed tomography scanner and a multislice computed tomography ... With equal accuracy, cone beam computed tomography (CBCT) can also be used for the diagnosis of ankylosed teeth (Balaji, 2013; ... Whereas cone beam computed tomography (CBCT) allows a three-dimensional assessment of axial, coronal, and sagittal planes of ...
... tomography (CBCT) for breast imaging already underway in the diagno ... The primary aim of this study is to continue the investigation of cone beam computed ... Cone Beam Computed Tomography for Breast Imaging. Trial Phase:. Phase 2. Minimum Age:. 35 Years. Maximum Age:. N/A ... Cone Beam Computed Tomography for Breast Imaging. Inclusion Criteria:. Group I:. - Females at least 35 years of age of any ...
David MacDonald about cone beam computed tomography (CBCT). What radiation dose does CBCT impart? What is likely to happen once ... Audio Series: Cone beam computed tomography (CBCT) This series of posts is based on Dr. John OKeefes conversation with Dr. ...
Visit our Oasis Discussions website to submit the most critical questions relating to your everyday practice. Or, call our toll-free line at 1-855-71-OASIS and leave us a message with your questions. We welcome a broad range of questions about diagnosis and treatment, techniques, materials, instruments, and devices or therapeutic agents. We encourage you to send us your questions as they arise. Our goal is to have JCDA Expert panellists answer your questions as quickly as possible and share them through our various channels of knowledge translation. You can help: Please send us the most common restorative emergency scenarios to which you need answers at [email protected] ...
Nearly two decades since Cone Beam-Computed Tomography (CBCT) was introduced in dentistry, this technology has been proven to ... "Clinical Endodontic Applications of Cone Beam-Computed Tomography in Modern Dental Practice" written by Johnah C. Galicia, ...
In computed tomography (CT), motion and deformation during the acquisition lead to streak artefacts and blurring in the ...
... is organized to progress sequentially through specific topics so as to build the ... Cone Beam Computed Tomography in Orthodontics provides timely, impartial, and state-of-the-art information on the indications ... Since its introduction to dentistry, cone beam computed tomography (CBCT) has undergone a rapid evolution and considerable ... and future evolutions in computed tomography. Part II presents the Principles and Protocols for CBCT Imaging in Orthodontics, ...
Agreement between cone beam computed tomography images and panoramic radiographs for initial orthodontic evaluation.. ... The aim of this study was to compare the agreement between cone beam computed tomography (CBCT) and panoramic radiographs for ...
In cone-beam industrial computed tomography (ICT), it iscommon that the diameter of the object is larger than thewidth of the ... In cone-beam industrial computed tomography (ICT), it is common that the diameter of the object is larger than the width of the ... Improved Scanning and Reconstruction of Large Objects by Cone-Beam Industrial Computed Tomography L. Zeng, X. Zou, J. Wang, P. ... In simulation experiments, compared with the 2nd generation cone-beam CT, the number of samples of this new imaging mode is ...
This free continuing education course will review Cone-Beam Computed Tomography (CBCT) and its applications in clinical ... This course will review Cone-Beam Computed Tomography (CBCT) and its applications in clinical dentistry. The technology and how ...
Cone-Beam Computed Tomography. May 1, 2014. It is interesting to observe the adoption of new technology in dentistry and ... Of particular interest is the use of cone-beam computed tomography (CBCT) as the imaging protocol of choice for comprehensive ...
... cone-beam computed tomography is growing in importance. In image reconstruction, a stack of cross-sectional images can be ...
The Association of Dental Implantology is a charity whose mission is to advance education in the field of dental implantology for the benefit of the public.
Varians Iterative Cone-Beam Computed Tomography (iCBCT): Clear Soft Tissue Visualization for Precision Radiotherapy , Varian. ... Varians Iterative Cone-Beam Computed Tomography (iCBCT): Clear Soft Tissue Visualization for Precision Radiotherapy. ... Varians technology for iterative cone-beam CT (iCBCT) at the treatment machine meets this need by improving on traditional ...
The careful development of easily accessible, fast optical readout tools such as cone beam optical computed tomography (CT) in ... In this thesis, the performance capabilities and limitations of the two main classes of cone beam optical CT-based absorbing ...
Purchase Cone Beam Computed Tomography: From Capture to Reporting, An Issue of Dental Clinics of North America, Volume 58-3 - ... Cone Beam Computed Tomography: From Capture to Reporting, An Issue of Dental Clinics of North America, Volume 58-3 1st Edition ... Cone Beam Computed Tomography: From Capture to Reporting, An Issue of Dental Clinics of North America ...
Weight Bearing Cone Beam Computed Tomography (WBCT) in the Foot and Ankle. A Scientific, Technical and Clinical Guide. Authors ... Weight Bearing Cone Beam Computed Tomography (WBCT) in the Foot and Ankle. Book Subtitle. A Scientific, Technical and Clinical ... A scientific, technical and clinical guide to all aspects of weight bearing cone beam computed tomography (WBCT) in the foot ... This scientific, technical and clinical guide to Weight Bearing Cone Beam Computed Tomography (WBCT), written by the board of ...
... wearers and non-wearers using cone-beam computed tomography (CBCT).. Materials and Methods: In total, 124 sites in the CBCT ... morphological changes in the mandible for dentate and totally edentate elderly population using cone-beam computed tomography, ... between height of residual ridge and bone density of residual ridge crest at edentulous mandible using computed tomography, ...
  • Cone beam computed tomography (or CBCT, also referred to as C-arm CT, cone beam volume CT, flat panel CT or Digital Volume Tomography (DVT)) is a medical imaging technique consisting of X-ray computed tomography where the X-rays are divergent, forming a cone. (wikipedia.org)
  • CBCT shares many similarities with traditional (fan beam) CT however there are important differences, particularly for reconstruction. (wikipedia.org)
  • This eliminates the time needed to transfer a patient from the angiography suite to a conventional computed tomography scanner and facilitates a broad spectrum of applications of CBCT during IR procedures. (wikipedia.org)
  • Cone-beam computed tomography systems (CBCT) are a variation of traditional computed tomography (CT) systems. (fda.gov)
  • The CBCT systems used by dental professionals rotate around the patient, capturing data using a cone-shaped X-ray beam. (fda.gov)
  • In cone beam computed tomography (CBCT), an X-ray beam in the form of a cone (hence the name) is applied, and during the scan, a certain volume is imaged, which is used to retrieve sectional images in different planes. (springer.com)
  • Honda K, Bjornland T. Image-guided puncture technique for the superior temporomandibular joint space: value of cone beam computed tomography (CBCT). (springer.com)
  • Dental cone-beam computed tomography (CBCT) received regulatory approval in Japan in 2000 and has been widely used since being approved for coverage by the National Health Insurance system in 2012. (springer.com)
  • Cone beam computed tomography (CBCT) has gained widespread acceptance in dentistry for a variety of applications. (hindawi.com)
  • To overcome some of the above limitations cone beam computed tomography (CBCT) for the jaws was developed in the 1990s and is gaining widespread acceptance in dentistry, especially in the last 5 years. (hindawi.com)
  • CBCT was initially developed for angiography and is also popularly used for radiotherapy guidance and mammography [ 1 ] as an alternative to conventional fan beam helical computed tomography (CT) machines to provide more rapid acquisition of a dataset of the entire field of view. (hindawi.com)
  • Cone beam computed tomography (CBCT) is a contemporary, radiological imaging system designed specifically for use on the maxillofacial skeleton. (osti.gov)
  • In addition, CBCT operates with a significantly lower effective radiation dose when compared with conventional computed tomography (CT). (osti.gov)
  • misc{etde_22026301, title = {Cone beam computed tomography in endodontic} author = {Durack, Conor, and Patel, Shanon} abstractNote = {Cone beam computed tomography (CBCT) is a contemporary, radiological imaging system designed specifically for use on the maxillofacial skeleton. (osti.gov)
  • The trend in the global cone beam computed tomography (CBCT) indicates that players must invest in developing countries to cater to consumers' unmet medical demands and attain bigger revenue shares, says Transparency Market Research in a new report. (openpr.com)
  • This 78 page report gives readers a comprehensive overview of the Cone Beam Computed Tomography (CBCT) Market. (openpr.com)
  • Get accurate market forecast and analysis on the Cone Beam Computed Tomography (CBCT) Market. (openpr.com)
  • During a CBCT scan, the machine rotates around the patient, capturing images using a cone-shaped X-ray beam. (aae.org)
  • The global Cone Beam Computed Tomography (CBCT) market was xx million US$ in 2018 and is expected to xx million US$ by the end of 2025, growing at a CAGR of xx% between 2019 and 2025. (openpr.com)
  • o To study and analyze the global Cone Beam Computed Tomography (CBCT) market size (value & volume) by company, key regions/countries, products and application, history data from 2014 to 2018, and forecast to 2025. (openpr.com)
  • o To understand the structure of Cone Beam Computed Tomography (CBCT) market by identifying its various subsegments. (openpr.com)
  • o Focuses on the key global Cone Beam Computed Tomography (CBCT) manufacturers, to define, describe and analyze the sales volume, value, market share, market competition landscape, SWOT analysis and development plans in next few years. (openpr.com)
  • o To analyze the Cone Beam Computed Tomography (CBCT) with respect to individual growth trends, future prospects, and their contribution to the total market. (openpr.com)
  • o To project the value and volume of Cone Beam Computed Tomography (CBCT) submarkets, with respect to key regions (along with their respective key countries). (openpr.com)
  • o What is the estimated growth rate and market share and size of the Cone Beam Computed Tomography (CBCT) market for the forecast period 2020 - 2025? (openpr.com)
  • Whereas cone beam computed tomography (CBCT) allows a three-dimensional assessment of axial, coronal, and sagittal planes of all dental extension, eliminating thus overlapping images and helping to confirm the correct diagnosis. (scielo.cl)
  • En el presente estudio se presenta un reporte de caso de un paciente con anquilosis en el diente 16 diagnosticado por CBCT, con el objetivo de proporcionar información para los dentistas sobre esta anomalía, sus características y situaciones en las que debe indicarse la CBCT. (scielo.cl)
  • This series of posts is based on Dr. John O'Keefe's conversation with Dr. David MacDonald about cone beam computed tomography (CBCT). (cda-adc.ca)
  • Since its introduction to dentistry, cone beam computed tomography (CBCT) has undergone a rapid evolution and considerable integration into orthodontics. (cmu.ac.th)
  • Cone Beam Computed Tomography in Orthodontics provides timely, impartial, and state-of-the-art information on the indications and protocols for CBCT imaging in orthodontics, clinical insights gained from these images, and innovations driven by these insights. (cmu.ac.th)
  • Part I provides the foundational information on CBCT technology, including radiation exposure and risks, and future evolutions in computed tomography. (cmu.ac.th)
  • The aim of this study was to compare the agreement between cone beam computed tomography (CBCT) and panoramic radiographs for initial orthodontic evaluation. (nih.gov)
  • This course will review Cone-Beam Computed Tomography (CBCT) and its applications in clinical dentistry. (dentalcare.com)
  • Of particular interest is the use of cone-beam computed tomography (CBCT) as the imaging protocol of choice for comprehensive orthodontic treatment. (mndental.org)
  • The aim of this study was to compare vertical and horizontal mandibular alveolar bone resorption by measuring bone morphological variation in Kennedy Class II removable partial denture (RPD) wearers and non-wearers using cone-beam computed tomography (CBCT). (wiley.com)
  • Objectives: To evaluate the effectiveness of a web-based instruction in the interpretation of anatomy in images acquired with maxillofacial cone beam CT (CBCT). (uva.nl)
  • This report (HPA-CRCE-010) outlines measures for protection from radiation doses from dental cone beam computed tomography (CBCT) examinations. (www.gov.uk)
  • The report aims to provide definitive guidance on the safe usage of dental cone beam computed tomography ( CBCT ) equipment to protect patients, dental practice staff and other people. (www.gov.uk)
  • 17 September 2015 Removed old guidance: The radiation protection implications of the use of cone beam computed tomography (CBCT) in dentistry - what you need to know. (www.gov.uk)
  • CHICAGO - September 28, 2017 - The American Academy of Periodontology (AAP), the leading professional organization dedicated to the dental specialty of periodontics, today published its first-ever "best evidence consensus" (BEC) proceedings on the topic of cone-beam computed tomography (CBCT). (perio.org)
  • Cone beam computed tomography (CBCT) is also widely used for diagnosis but is expensive and relatively cumbersome. (mit.edu)
  • The use of cone beam computed tomography (CBCT) is growing in the clinical arena, due to its ability to provide 3-D information during interventions, its high diagnostic quality (sub-millimeter resolution), and its short scanning times (10 seconds). (spie.org)
  • PurposeThis study was designed to analyze retrospectively the performance of cone-beam computed tomography (CBCT) hepatic arteriography in depicting tumors and their feeders and to investigate the related determining factors in chemoembolization for hepatocellular carcinoma (HCC).MethodsEighty-six patients with 142 tumors satisfying the imaging diagnosis criteria of HCC were included in this study. (osti.gov)
  • Accurate quantitative reconstruction in kV cone-beam computed tomography (CBCT) is challenged by the presence of secondary radiations (scattering, fluorescence, and bremsstrahlung photons) coming from the object and from the detector itself. (spie.org)
  • In this study, a novel technique for measuring breast density based on the segmentation of 3D cone beam CT (CBCT) images was developed and the results were compared to those obtained from 2D digital mammograms. (spie.org)
  • Cone-beam CT (CBCT) is an oral and maxillofacial imaging modality that produces high-resolution images. (frontiersin.org)
  • To assess the prevalence of temporomandibular joint (TMJ) bony changes in cone beam computed tomography (CBCT) images of adult subjects without ongoing orofacial pain or complaints from the TMJ. (nih.gov)
  • A promising alternative is the high-resolution cone-beam computed tomography (CBCT), which is already the gold standard in many dental and maxillofacial applications. (aofoundation.org)
  • Dental cone beam computed tomography (CBCT) has been a transformative technology for the dental profession, providing 3D imaging for individual teeth, the entire jaw or even the entire craniofacial complex. (cern.ch)
  • They are based specially on Computed tomography (CT-Scan), with the Dentascan application and cone beam computed tomography (CBCT). (scirp.org)
  • Aim: This study aimed at studying the knowledge and practices of dentist and oral and maxillofacial surgeons on sectional imaging such as Dentascan and Cone Beam Computed Tomography (CBCT). (scirp.org)
  • 1999 [5] first described the application of cone beam computed tomography (CBCT). (scirp.org)
  • Cone-beam computed tomography (CBCT) can provide valuable data for root canal systems of human teeth. (unboundmedicine.com)
  • ABSTRACT: Nearly two decades since Cone Beam-Computed Tomography (CBCT) was introduced in dentistry, this technology has been proven to be a useful asset in modern dental practice. (scirp.org)
  • Purpose: The purpose of this retrospective study was to compare the performance of cone-beam computed tomography (CBCT) and panoramic radiography in detecting the presence and location of maxillary sinus septa. (thefreelibrary.com)
  • Written for the clinician, Cone Beam Computed Tomography helps the reader understand how CBCT machines operate, perform advanced diagnosis using CT data, have a working knowledge of CBCT-related treatment planning for specific clinical tasks, and integrate these new technologies in daily practice. (ellibs.com)
  • Dr. Scarfe has published extensively on cone beam computed tomography (CBCT) including recent consensus statements on general and specific use guidelines and discipline specific applications of CBCT. (fishpond.co.nz)
  • To investigate cone beam computed tomography (CBCT) accuracy in measuring facial bone height and detecting dehiscence and fenestration defects around teeth. (bioportfolio.com)
  • The aim of this study was to determine the possibility and extent of artifact reduction by an optimized use of cone beam computed tomography (CBCT) parameter configuration (geometric resolution, impla. (bioportfolio.com)
  • To assess the diagnostic accuracy of Cone Beam Computed Tomography (CBCT) to diagnose apical periodontitis (AP) using histopathology of ex vivo human jaws as the reference standard. (bioportfolio.com)
  • Cone beam computed tomography (CBCT), is a recent medical imaging technique where the X-rays are divergent, forming a cone. (bioportfolio.com)
  • The overarching objective of our proposal is to develop a One-Stop-Shop imaging using the available C-arm Cone-Beam Computed Tomography (CBCT) data acquisition systems currently widely ava. (bioportfolio.com)
  • The primary aim of this study is to investigate the use of cone beam computed tomography (CBCT) for breast imaging in the diagnostic setting by providing a compelling body of evidence inco. (bioportfolio.com)
  • Objective: To evaluate the diagnostic concordance between multislice computed tomography (MSCT) and cone beam computed tomography (CBCT) in the early postoperative assessment of patients a. (bioportfolio.com)
  • Purpose: To evaluate the influence of the milliamperage settings on cone beam computed tomography (CBCT) images for qualitative and quantitative preoperative implant planning. (quintpub.com)
  • The study aim is to assess the accuracy of cone-beam computed tomographic (CBCT) imaging in detecting a second mesiobuccal root canal in endodontically treated maxillary molars. (uva.nl)
  • The sample comprised 26 cone-beam computed tomography (CBCT) scans of 13 patients. (scielo.br)
  • Cone beam computed tomography (or CBCT, also referred to as C-arm CT, cone beam volume CT, or flat panel CT) is a medical imaging technique consisting of X-ray computed tomography where the X-rays are divergent, forming a cone. (ebme.co.uk)
  • To compare the diagnostic accuracy of intraoral digital periapical radiography with that of cone beam computed tomography (CBCT) for the detection of artificial periapical bone defects in dry human jaws. (ovid.com)
  • The aim of this study is to explore the anatomy of the Vidian nerve to elucidate the appropriate surgical approach based on preoperative cone-beam computed tomography (CBCT) images. (springer.com)
  • The purpose of this study is to assess the stages of skeletal maturity in cone beam computed tomography (CBCT), hand-wrist radiography (HWR) and cephalometric radiography (CR) techniques of orthodontic patients, and associate skeletal maturity stages with chronological age, in a Turkish subpopulation. (springer.com)
  • This study evaluated the potential impact of different visualisation methods of cone-beam computed tomography (CBCT) on the accuracy of linear measurements of calcified structures, and assessed their interchangeability. (uzh.ch)
  • The country research report on Saudi Arabia cone beam computed tomography (CBCT) market is a customer intelligence and competitive study of the Saudi Arabia market. (marketresearch.com)
  • Purpose: To evaluate the relationship between mandibular bone structure parameters measured on preimplant cone beam computed tomography (CBCT) images and primary implant stability. (quintpub.com)
  • PURPOSE The purpose of the present study was to determine the frequency of relevant nondental related incidental findings in cone-beam computed tomography (CBCT) of the head and neck. (uzh.ch)
  • The market for cone beam computed tomography (CBCT) scanners has been present in Europe since the early 2000s. (rnrmarketresearch.com)
  • Currently Dentistry is witnessing a change in diagnostic techniques with the introduction of cone beam computed tomography (CBCT) technology, since it offers three-dimensional imaging. (researchandmarkets.com)
  • Although cone beam computed tomography technology was introduced a decade ago, demand has increased recently as computers with advanced technology have enabled production of CBCT units at reasonable prices for applications in dentistry. (researchandmarkets.com)
  • The global cone beam computed tomography (CBCT) market is dominated by players such as Danaher, Sirona, Planmeca, and Vatech, who collectively accounted for more than 85% of the market in 2015. (transparencymarketresearch.com)
  • The review of the global CBCT market is based on the findings of TMR research report, titled " Cone Beam Computed Tomography (CBCT) Market: Global Industry Analysis, Size, Share, Growth, Trends, and Forecast, 2015 - 2023 . (transparencymarketresearch.com)
  • Cone beam computed tomography (CBCT) has become a popular diagnostic method in endodontics. (springeropen.com)
  • Cone beam computed tomography (CBCT) is widely used in dentistry and maxillofacial surgery due to its benefits over traditional techniques. (researchmoz.us)
  • Cone beam CT (CBCT) systems have many advantages over conventional CT for dental treatment and planning, such as lower radiation dose to patients in most cases, smaller acquisition times for the resolution needed in dentistry, a reasonable alternative to CT in terms of cost, and improved resolution with more details. (researchmoz.us)
  • Based on application, the global cone beam computed tomography (CBCT) market has been segmented into dental implants, orthodontics, oral surgery, endodontics, and general dental surgery. (researchmoz.us)
  • Carestream Dental is committed to educating oral health professionals on Cone Beam Computed Tomography (CBCT), including its proper use, benefits and possible risks. (carestreamdental.com)
  • One of the most important innovations in dental diagnostics has been the advent of cone beam computed tomography (CBCT), which has proven effective for many applications in oral healthcare. (carestreamdental.com)
  • Objectives: The aim of the present in vitro study was to review a new approach to localizing second mesiobuccal (MB2) canals in maxillary first molars using cone beam computed tomography (CBCT). (sid.ir)
  • Purpose: To test the superiority of a soft tissue-based setup using cone-beam computed tomography (CBCT) to a bony structure-based setup using the ExacTrac system in intensity-modulated radiotherapy (IMRT) for prostate cancer. (nii.ac.jp)
  • Thesis problem: Cone beam computed tomography (CBCT) can provide images with identical information and considerable dose reduction compared with reasonably low costs compared to multislice computed tomography (MSCT) especially where multiple follow up imaging studies are needed. (uiowa.edu)
  • Material and methods: Cone beam computed tomography (CBCT) images of 63 subjects made with the same machine, with unknown clinical histories and no evidence of pathosis on CBCT images, were evaluated by two oral and maxillofacial radiologists retrospectively. (uiowa.edu)
  • conducted a study to quantify the buccal bone thickness and peri-radicular space in the tooth-bearing area to provide practical guidelines for mini-implant placement using Cone-Beam Computed Tomography (CBCT) [ 8 ]. (alliedacademies.org)
  • While Computed Tomography (CT) is a well-established diagnostic tool in many areas of medicine it is only since the development of Cone Beam Computed Tomography (CBCT) that is use in dentistry is beginning to be explored. (nationalelfservice.net)
  • The aim of this new review was to determine the diagnostic accuracy of cone-beam computed tomography (CBCT) for tooth fractures in vivo. (nationalelfservice.net)
  • Cone Beam Computed Tomography (CBCT) is a developing technique that is being increasingly used in dento-maxillo-facial imaging due to its relatively low dose and high spatial resolution features. (alliedacademies.org)
  • This unusual morphology was diagnosed using a dental operating microscope (DOM) and confirmed with the help of cone-beam computed tomography (CBCT) images. (semanticscholar.org)
  • To compare the dimensions of maxillary sinuses in dentate and edentulous patients using cone beam computed tomography (CBCT) scans and a customised software program. (springermedizin.de)
  • Cone-beam computed tomography (CBCT) scans from 387 patients were analyzed retrospectively. (3dmd.com)
  • Radiotherapy image-guided verification is commonly performed by comparing lesion position and motion estimated in the treatment room with cone beam CT (CBCT), CT on rails, megavoltage CT (MVCT) or other methods to the primary planning CT study acquired at the time of treatment simulation. (scirp.org)
  • These differences include smaller x-ray beam volumetric coverage in CT versus much larger coverage in CBCT for a single rotation, scan time on the order of seconds in 4DCT versus minutes in 4DCBCT, arc detector versus flat panel detector geometry employed with different anti-scatter setups, and external surrogates in 4DCT versus internal tracking in 4DCBCT of respiratory motion. (scirp.org)
  • This report reviews relevant literature on foreign bodies identified with cone-beam computed tomography (CBCT) and documents a rare case of a foreign body that was serendipitously identified during routine implant treatment planning. (escholarship.org)
  • Cone beam computed tomography (CBCT) är en form av datortomografi vanlig inom odontologi och börjar utnyttjas mer inom ortopedisk diagnostik. (diva-portal.org)
  • CBCT påvisade god bildkvalitet och diagnostisk förmåga till en relativt låg stråldos, samt högre sensitivitet och specificitet än konventionell röntgen. (diva-portal.org)
  • Cone beam computed tomography (CBCT) is a method commonly used in odontology and is becoming more used in orthopedic diagnostics. (diva-portal.org)
  • The aim of this study was to evaluate the validity of the bone density value of potential implant sites in HU obtained by a specific cone-beam computed tomography (CBCT) device. (avmi.net)
  • The advent of Cone Beam Computed Tomography (CBCT) has brought a massive change in the field of dentistry which has become an important tool for diagnosis. (jcdr.net)
  • Purpose: To evaluate the dependence of an automatic match process on the size of the user-defined region of interest (ROI), the structure volume of interest (VOI), and changes in tumor volume when using cone-beam computed tomography (CBCT) for tumor localization and to compare these results with a gold standard defined by a physician's manual match. (elsevier.com)
  • The objective of this study was to evaluate the diagnostic yield of dental radiography (DR) and 3 cone-beam computed tomography (CBCT) software modules for the identification of 32 pre-defined dentoalveolar lesions in cats. (escholarship.org)
  • Differences in bone density before and after regenerative endodontic treatment were examined in teeth with periapical lesions in Hounsfield Units (HUs) by using Cone Beam Computed Tomography (CBCT). (biomedres.info)
  • As dental implants become more popular, a greater number of specialists and general practitioners (GPs) will use Cone Beam Computed Tomography (CBCT) scanners to take images of a patient's jaw in order to evaluate the placement of dental implants. (idataresearch.com)
  • Cone-beam computed tomography or conventional radiography for localising of maxillary impacted canines? (nature.com)
  • Panoramic radiography and computed tomography were the pillars of maxillofacial diagnosis. (dovepress.com)
  • Diagnostic approaches for dental disease include gross oral examination, endoscopic oral examination, skull radiography, and computed tomography (CT). (frontiersin.org)
  • 2016) Diagnostic Accuracy of Cone-Beam Computed Tomography and Conventional Radiography on Apical Periodontitis A Systematic Review and Meta-Analysis. (scirp.org)
  • Comparing the diagnostic efficacy of intraoral radiography and cone beam computed tomography volume registration in the detection of mandibular alveolar bone defects. (bioportfolio.com)
  • Patel S, Dawood A,Mannocci F, Wilson R, Pitt Ford T. Detection of periapical bone defects in human jaws using cone beam computed tomography and intraoral radiography. (ovid.com)
  • Accuracy of digital panoramic radiography in the diagnosis of temporal bone pneumatization: a study in vivo using cone-beam-computed tomography. (semanticscholar.org)
  • The Diagnostic Yield of Dental Radiography and Cone-Beam Computed Tomography for the Identification of Dentoalveolar Lesions in Cats. (escholarship.org)
  • What do we (don't) know about the use of Cone Beam Computed Tomography in endodontics? (springeropen.com)
  • Evidence-Based Endodontics welcomes submissions to the thematic series on Cone Beam Computed Tomography in Endodontics. (springeropen.com)
  • In addition, indicate within your cover letter that you wish your manuscript to be considered as part of the thematic series on Cone Beam Computed Tomography in Endodontics. (springeropen.com)
  • Cone beam computed tomography in endodontics: the missing link? (springeropen.com)
  • Use of Cone Beam Computed Tomography in Endodontics. (carestreamdental.com)
  • This review article highlights the potential applications of cone-beam computed tomography in the fields of dental implantology and forensic dentistry, and its limitations in maxillofacial diagnosis. (dovepress.com)
  • The global Cone Beam Computed Tomography market is valued at xx million US$ in 2017 and will reach xx million US$ by the end of 2025, growing at a CAGR of xx% during 2018-2025. (emailwire.com)
  • This research report categorizes the global Cone Beam Computed Tomography market by top players/brands, region, type and end user. (emailwire.com)
  • Sirona's Galileos brand is another key entity in the global cone beam computed tomography market. (transparencymarketresearch.com)
  • According to Transparency Market Research (TMR), the global cone beam computed tomography market is expected to rise to a valuation of US$960.8 mn by the end of 2023. (transparencymarketresearch.com)
  • Due to the direct impact of technological sophistication on the number of lives saved, the global cone beam computed tomography market has enjoyed steady investment in the last few years and is likely to exhibit steady growth in the coming years as a result. (transparencymarketresearch.com)
  • The rising geriatric population in developed economies is another main driver for the global cone beam computed tomography market. (transparencymarketresearch.com)
  • The increased need of the geriatric demographic for medical testing is likely to remain a key driver for the global cone beam computed tomography market, particularly in developed economies. (transparencymarketresearch.com)
  • Accordingly, oral surgery is the leading application segment of the global cone beam computed tomography market and is likely to retain steady dominance in the market in the coming years. (transparencymarketresearch.com)
  • Geographically, the global cone beam computed tomography market is segmented into North America, Asia Pacific, Europe, Latin America, and Rest of the World. (transparencymarketresearch.com)
  • The region is expected to account for more than a third of the global cone beam computed tomography market in the coming years. (transparencymarketresearch.com)
  • However, emerging regions such as Asia Pacific and Latin America are likely to play a key role in the development of the global cone beam computed tomography market in the near future. (transparencymarketresearch.com)
  • Lewes, DE -- ( SBWIRE ) -- 09/06/2016 -- 2016 Global Cone Beam Computed Tomography Industry Report is a professional and in-depth research report on the world's major regional market conditions of the Cone Beam Computed Tomography industry, focusing on the main regions (North America, Europe and Asia) and the main countries (United States, Germany, Japan and China). (sbwire.com)
  • Spanning over 151 pages "Global Cone Beam Computed Tomography Report-Market Size and Forecast 2016" report covers Cone Beam Computed Tomography Industry Overview, Asia Cone Beam Computed Tomography Industry, North American Cone Beam Computed Tomography Industry, Europe Cone Beam Computed Tomography Industry Analysis, Cone Beam Computed Tomography Marketing Channels and Investment Feasibility, Global Cone Beam Computed Tomography Industry Conclusions. (sbwire.com)
  • H. Salehi, M. Mahdian, H. Alnajjar, and A. Tadinada, "Utilizing Optical Coherence Tomography and Cone Beam Computed Tomography for Oral Tissues Characterization: ex vivo Study," in Biomedical Optics 2016 , OSA Technical Digest (online) (Optical Society of America, 2016), paper JTu3A.52. (osapublishing.org)
  • The United States Cone Beam Computed Tomography Industry 2016 Market Research Report is a professional and in-depth study on the current state of the Cone Beam Computed Tomography industry. (qyresearchreports.com)
  • In this report, the United states cone beam computed tomography industry 2016 market research report market has been carefully studied with numerous features put into inspection for the market to be brought into clear picture before the readers. (qyresearchreports.com)
  • The study further puts stress on the progress graph of the United states cone beam computed tomography industry 2016 market research report market along with suitable data pertaining to certain aspects of the market. (qyresearchreports.com)
  • Analysts have accurately and microscopically analyzed the different aspects of the market and this will further aid in broadcasting and executing accurate figures and statistics on numerous facets relating the United states cone beam computed tomography industry 2016 market research report market for the coming years. (qyresearchreports.com)
  • The market research publication also offers readers with an inclusive insight on the regions and the scenario of the United states cone beam computed tomography industry 2016 market research report market in those regions. (qyresearchreports.com)
  • The study will also offer an instructive overview of the vendor landscape of the United states cone beam computed tomography industry 2016 market research report market with as assimilation of facts such as research activities, developments, product portfolio, company revenue, mergers, procurements, and promotion and growth strategies of the superior players operating in the market. (qyresearchreports.com)
  • Of these, North America has conventionally been the leading regional market for cone beam computed tomography thanks to the presence of several leading companies in the healthcare sector. (transparencymarketresearch.com)
  • A new volumetric CT machine for dental imaging based on the cone-beam technique: preliminary results. (springer.com)
  • For each breast specimen, volumes of the dense tissue structures and the entire breast were computed and used to calculate the volumetric breast density. (spie.org)
  • Using an amorphous silicon detector and x-ray tube, volumetric computed tomography images are reconstructed from kilovoltage radiographs by filtered backprojection. (elsevier.com)
  • To our knowledge, this is the second case in the dental literature reported demonstrating the use of Cone-Beam CT in the diagnosis of concrescence. (hindawi.com)
  • Cone-Beam Computed Tomography (Cone-Beam CT) was developed in the 1990s and it is an addition to the imaging armamentarium for use in diagnosis. (hindawi.com)
  • Cone beam CT technology has been used in various ways from differential diagnosis of abrasions in order to understand the location of teeth or roots to critical anatomical characteristics, and to evaluate endodontic pathology, and this has helped improved patient care. (researchandmarkets.com)
  • Lennon S, Patel S, Foschi F, Wilson R, Davies J, Mannocci F. Diagnostic accuracy of limited-volume cone-beam computed tomography in the detection of periapical bone loss: 360° scans versus 180° scans. (springer.com)
  • From the wide scope of findings noted on these scans, it can be concluded that it is essential that a person trained in advanced interpretation techniques in radiology interprets cone beam computed tomography scans. (hindawi.com)
  • The purpose of this study is to use cone-beam CT scans to more accurately position the tumor during radiation and to see whether this method is more effective than the standard method of using 2D images (portal images), which is a type of X-ray. (clinicaltrials.gov)
  • With cone-beam CT scans taken before and during your treatment, we will be able to determine the location of the tumor with 3D images, measure how much the tumor moves as you breathe, and then position you so that the tumor will get the best delivery of radiation. (clinicaltrials.gov)
  • You will have the following CT scans along with the standard weekly portal images:Before treatment you will have a CT scan (a respiratory-correlated CT scan) at the time of the radiation planning, or simulation planning.During the first week of treatment - you will have 5 cone-beam CT scans at days 1 through 5 of your radiation treatment schedule. (clinicaltrials.gov)
  • The total number of cone-beam CT scans can be between 8 and 10. (clinicaltrials.gov)
  • Cone beam CT scans provide more information that conventional dental x-ray, allowing for more precise treatment planning. (ebme.co.uk)
  • Cone-beam computed tomography scans of 38 patients with suspected upper airway obstruction were analyzed. (ovid.com)
  • Diagnostic accuracy of cone beam computed tomography used for assessment of apical periodontitis: an ex vivo histopathological study on human cadavers. (bioportfolio.com)
  • Sophisticated imaging tools such as cone beam computed tomography are used for diagnostic tests and routine checkups. (transparencymarketresearch.com)
  • Bahşi I, Orhan M, Kervancıoğlu P, Yalçın ED, Aktan AM (2018) Anatomical evaluation of nasopalatine canal on cone-beam computed tomography images. (springer.com)
  • Cone Beam Computed Tomography in Orthodontics is organized to progress sequentially through specific topics so as to build the knowledgebase logically in this important and rapidly evolving field. (cmu.ac.th)
  • Kapila SD (2014) Cone beam computed tomography in orthodontics: indications, insights, and innovations. (springer.com)
  • Agreement between cone beam computed tomography images and panoramic radiographs for initial orthodontic evaluation. (nih.gov)
  • Two-dimensional radiographs and cone beam computed tomography are commonly used for evaluating sub-surface hard structures of teeth. (mit.edu)
  • Hounsfield G. Computerized transverse axial scanning (tomography) Part 1. (springer.com)
  • Is the Subject Area "Computed axial tomography" applicable to this article? (plos.org)
  • Computed tomography (CT-Scan) represents layers in the axial, coronal or sagittal plane and can provide information about the topographical location of various structures to one another. (scirp.org)
  • Cone-beam computed tomography study of root and canal morphology of maxillary first and second molars in an Indian population. (semanticscholar.org)
  • Cone-beam imaging, also referred to as digital volume tomography, is one of the most important developments in dental and maxillofacial radiology and, due to its versatility, will almost certainly Become an increasingly popular form of imaging available in dental practice. (researchandmarkets.com)
  • Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. (bioportfolio.com)
  • Toyofuku F, Konishi K, Kanda S. Fluoroscopic computed tomography: an attempt at 3-D imaging of teeth and jaw bones. (springer.com)
  • The aim of this article was to describe a case of dental abnormality using Cone-Beam CT imaging modality. (hindawi.com)
  • Cone beam computed tomography is an innovative medical imaging technique that provides endodontists with three-dimensional views of the patient. (aae.org)
  • In simulation experiments, compared with the 2nd generation cone-beam CT, the number of samples of this new imaging mode is reduced by a factor of 34, redundant projections are reduced at least a hundredfold, and the projections do not need reordering. (actapress.com)
  • The first book publication of its kind on this exciting and developing imaging modality, Weight Bearing Cone Beam Computed Tomography (WBCT) in the Foot and Ankle will be an excellent resource for orthopedic and foot and ankle surgeons, radiologists, and allied medical professionals working in this clinical area. (springer.com)
  • The purpose of this presentation is to show how a commercially available spiral CT can be modified for use as the electro-mechanical scanner hardware for a prototype flat panel detector-based cone beam volume computed tomography (FPD-CBVCT) imaging system. (spie.org)
  • The teeth were then further examined using micro-computed tomographic imaging as the gold standard. (uva.nl)
  • However, dental cone beam CT can be used to produce images that are similar to those produced by conventional CT imaging. (ebme.co.uk)
  • Cone-beam (CB) computed tomography (CT) is widely used in the field of medical imaging for guidance. (iospress.com)
  • As it rotates, the scanner uses a cone shaped X-ray beam that is projected through the patient and onto the imaging sensor. (rnrmarketresearch.com)
  • Under these study conditions, volume and minimal cross-sectional airway used to assess localized adenoid hypertrophy with cone-beam computed tomography imaging based on automated measurements may not yield high-quality clinically relevant information about upper airway constriction related to adenoid hypertrophy. (ovid.com)
  • Corrections were validated independently using megavoltage electronic portal imaging to record the target position with respect to symmetric treatment beam apertures. (elsevier.com)
  • The suite covers market reports on Intraoral X-ray Imaging, Extraoral X-ray Imaging, and Cone Beam Computed Tomography Scanners. (idataresearch.com)
  • Silva MA, Wolf U, Heinicke F, Bumann A, Visser H, Hirsch E. Cone-beam computed tomography for routine orthodontic treatment planning: a radiation dose evaluation. (springer.com)
  • Dental cone beam CT is commonly used for treatment planning of orthodontic issues. (ebme.co.uk)
  • Three-dimensional airway evaluation in 387 subjects from one university orthodontic clinic using cone beam computed tomography. (3dmd.com)
  • The American Academy of Oral and Maxillofacial Radiology (AAOMR) suggests cone-beam CT as the preferred method for presurgical assessment of dental implant sites. (wikipedia.org)
  • In order to characterize oral tissues, human specimens were imaged ex-vivo by optical coherence tomography and compared with images obtained by cone beam computed tomography. (osapublishing.org)
  • Home / Specialty / Oral and Maxillofacial / Automated 3-Dimensional Airway Analysis from Cone-Beam Computed Tomography Data. (3dmd.com)
  • Maxillary first molar with seven root canals diagnosed with cone-beam computed tomography scanning: a case report. (semanticscholar.org)
  • Maxillary second molar with 5 roots and 5 canals evaluated using cone beam computerized tomography: a case report. (semanticscholar.org)
  • In contrast to computer tomography the Arai group introduced an Ortho-CT using a conical beam of radiation. (scirp.org)
  • The careful development of easily accessible, fast optical readout tools such as cone beam optical computed tomography (CT) in combination with stable and reliable low-toxicity gel dosimeters is one key step in this process. (queensu.ca)
  • It reviews the development of current CT dose formalisms up to the current International Electrotechnical Commission (IEC) methodologies and presents practical measurement guidance in the implementation of new dosimetric methods needed with wide beam CT. (iaea.org)
  • Varian's technology for iterative cone-beam CT (iCBCT) at the treatment machine meets this need by improving on traditional image reconstruction methods. (varian.com)
  • In microtomography X-ray scanners, cone beam reconstruction is one of two common scanning methods, the other being Fan beam reconstruction. (wikipedia.org)
  • Instead of utilizing a single row of detectors, as fan beam methods do, a cone beam systems uses a standard charge-coupled device camera, focused on a scintillator material. (wikipedia.org)
  • Automated 3-Dimensional Airway Analysis from Cone-Beam Computed Tomography Data. (3dmd.com)
  • The phantom airway volume was computed by measurement to be 50.01 cm3 (radius 1.262 cm, length 10.06 cm). (3dmd.com)
  • Kurt H, Orhan K, Aksoy S, Kursun S, Akbulut N, Bilecenoglu B. Evaluation of the superior semicircular canal morphology using cone beam computed tomography: a possible correlation for temporomandibular joint symptoms. (springer.com)
  • Evaluation of the effective dose of cone beam computed tomography and multi-slice computed tomography for temporomandibular joint examinations at optimized exposure levels. (springer.com)
  • Liu L, Li J, Ji H, Zhang N, Wang Y, Zheng G, Wang H, Luo E. Cone-beam computed tomography evaluation of the maxillofacial features of patients with unilateral temporomandibular joint ankyloses undergoing condylar reconstruction with an autogenous coronoid process graft. (springer.com)
  • Evaluation of pneumatization in the articular eminence and roof of the glenoid fossa with cone-beam computed tomography. (semanticscholar.org)
  • Image quality vs radiation dose of four cone beam computed tomography scanners. (springer.com)
  • The Relationship between Maxillary Sinus Lateral Wall Thickness, Alveolar Bone Loss, and Demographic Variables: A Cross-sectional Cone Beam Computerized Tomography Study. (bioportfolio.com)
  • Modality of computed tomography in which the patient is irradiated in a spiral path around the body with a cone or pyramid-shaped beam. (bioportfolio.com)
  • Incidental Findings From Cone-Beam Computed Tomography During Implant Therapy. (escholarship.org)
  • Correlation between cone-beam computed tomography and high-resolution peripheral computed tomography for assessment of wrist bone microstructure, J Bone Miner Res. (aofoundation.org)
  • An In Vivo and Cone Beam Computed Tomography Investigation of the Accuracy in Measuring Alveolar Bone Height and Detecting Dehiscence and Fenestration Defects. (bioportfolio.com)
  • Computed tomography Industrial CT scanning Tomographic reconstruction Chris C. Shaw (14 February 2014). (wikipedia.org)
  • A dental cone beam scan offers useful information when it comes to the assessment and planning of surgical implants. (wikipedia.org)
  • This "2nd + 3rd " generation scan mode shares similarities with the conventional 2nd generation cone-beam CT, but the source and the detector are only translated a few times horizontally, and the rotary graduation equals that of the 3rd generation cone-beam CT. (actapress.com)
  • During the remaining weeks of treatment - you will have a cone-beam CT scan every week. (clinicaltrials.gov)
  • A computed tomography scan employs computer processed arrangements of several X-ray images which have been taken from many different angles in order to produce tomographic or cross sectional virtual slices or images of precise areas of a particular scanned object. (qyresearchreports.com)
  • Computed tomography is used in the medical field for the purpose of scanning head, lungs, pulmonary angiogram, cardiac, abdominal and pelvic region, and at times to scan fractures occurring in joints and other ligaments and even dislocation of bones. (qyresearchreports.com)
  • Image-guided radiation therapy is a form of external beam radiotherapy where the patient is positioned with the organs to be treated accurately matched in position to the treatment field, to reduce the dose to nearby organs which are not being treated. (wikipedia.org)
  • To determine the reduction in the proportion of patients with large target positioning errors using the cone-beam CT guided procedure. (clinicaltrials.gov)
  • The rising disposable income of patients in these regions is a key driver for the cone beam computed tomography market. (transparencymarketresearch.com)
  • Cone Beam Computed Tomography Assessment of the Buccal Bone Thickness in Anterior Maxillary Teeth: Relevance to Immediate Implant Placement. (bioportfolio.com)
  • Cone beam computed tomography scanners have been commercially available since 2001 in the United States [ 3 ]. (hindawi.com)
  • INTERNATIONAL ATOMIC ENERGY AGENCY, Status of Computed Tomography Dosimetry for Wide Cone Beam Scanners, Human Health Reports No. 5, IAEA, Vienna (2011). (iaea.org)
  • Four-dimensional cone beam computed tomography (4DCBCT) facilitates verification of lung tumor motion before each treatment fraction and enables accurate patient setup in lung stereotactic ablative body radiation therapy. (edu.au)
  • The ability of respiratory-correlated fan beam CT (4DCT) and respiratory-correlated cone beam CT (4DCBCT) to accurately estimate tumor volume is critical to accurate dosimetry and treatment verification for lung stereotactic body radiation therapy (SBRT) and other motion-managed therapies. (scirp.org)
  • Computed tomography modalities which use a cone or pyramid-shaped beam of radiation. (bioportfolio.com)
  • Cone beam reconstruction uses a 2-dimensional approach for obtaining projection data. (wikipedia.org)
  • The method is referred to as cone-beam reconstruction because the X-rays are emitted from the source as a cone-shaped beam. (wikipedia.org)
  • Endodontic management of a maxillary first molar with eight root canal systems evaluated using cone-beam computed tomography scanning: a case report. (semanticscholar.org)
  • In this thesis, the performance capabilities and limitations of the two main classes of cone beam optical CT-based absorbing and scattering gel dosimetry are characterized, and their measurement improved through careful matching of dosimeter and scanner performance. (queensu.ca)
  • This publication supports an interim solution to the dosimetric problems caused by modern computed tomography (CT) equipment, particular with respect to the wide X ray beam angles increasing seen in clinical practice. (iaea.org)
  • This scientific, technical and clinical guide to Weight Bearing Cone Beam Computed Tomography (WBCT), written by the board of the International WBCT Society, presents all of the relevant content to date on the development, implementation, interpretation and clinical application of WBCT for the foot and ankle. (springer.com)
  • You can earn a 5% commission by selling Maxillofacial Cone Beam Computed Tomography: Principles, Techniques and Clinical Applications on your website. (fishpond.co.nz)
  • Pneumatization of the articular eminence on cone beam computed tomography: prevalence, characteristics and a review of the literature. (semanticscholar.org)
  • The same cone beam beam source and detector can alternatively be used to take simple X-ray positioning images if the organ shows particularly well on X-ray or if Fiducial markers have been inserted into the organ. (wikipedia.org)
  • Cone-beam CT is a type of CT scanner attached to the treatment accelerator that produces 3D images of the patient. (clinicaltrials.gov)
  • Images obtained with cone beam CT allow for more precise treatment planning. (ebme.co.uk)
  • During a cone beam CT examination, the C-arm or gantry rotates around the head in a complete 360-degree rotation while capturing multiple images from different angles that are reconstructed to create a single 3-D image. (ebme.co.uk)
  • Cone-Beam CT eliminates these limitations. (hindawi.com)