Tomography x ray computed. Medical search

Tomography using x-ray transmission and a computer algorithm to reconstruct the image.

Imaging methods that result in sharp images of objects located on a chosen plane and blurred images located above or below the plane.

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.

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.

Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.

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.

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.

Penetrating, high-energy electromagnetic radiation emitted from atomic nuclei during NUCLEAR DECAY. The range of wavelengths of emitted radiation is between 0.1 - 100 pm which overlaps the shorter, more energetic hard X-RAYS wavelengths. The distinction between gamma rays and X-rays is based on their radiation source.

Examination of any part of the body for diagnostic purposes by means of X-RAYS or GAMMA RAYS, recording the image on a sensitized surface (such as photographic film).

Types of spiral computed tomography technology in which multiple slices of data are acquired simultaneously improving the resolution over single slice acquisition technology.

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.

Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.

A tomographic technique for obtaining 3-dimensional images with transmission electron microscopy.

Tomography using x-ray transmission.

Identification and measurement of ELEMENTS and their location based on the fact that X-RAYS emitted by an element excited by an electron beam have a wavelength characteristic of that element and an intensity related to its concentration. It is performed with an electron microscope fitted with an x-ray spectrometer, in scanning or transmission mode.

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)

A diffuse parenchymal lung disease caused by inhalation of dust and by tissue reaction to their presence. These inorganic, organic, particulate, or vaporized matters usually are inhaled by workers in their occupational environment, leading to the various forms (ASBESTOSIS; BYSSINOSIS; and others). Similar air pollution can also have deleterious effects on the general population.

A subclass of cartilaginous fish comprising the SHARKS; rays; skates (SKATES (FISH);), and sawfish. Elasmobranchs are typically predaceous, relying more on smell (the olfactory capsules are relatively large) than sight (the eyes are relatively small) for obtaining their food.

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.

The common name for all members of the Rajidae family. Skates and rays are members of the same order (Rajiformes). Skates have weak electric organs.

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.

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).

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)

Neutrons, the energy of which exceeds some arbitrary level, usually around one million electron volts.

Hospital department which is responsible for the administration and provision of x-ray diagnostic and therapeutic services.

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.

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.

The joint that is formed by the distal end of the RADIUS, the articular disc of the distal radioulnar joint, and the proximal row of CARPAL BONES; (SCAPHOID BONE; LUNATE BONE; triquetral bone).

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.

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.

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.

The effects of ionizing and nonionizing radiation upon living organisms, organs and tissues, and their constituents, and upon physiologic processes. It includes the effect of irradiation on food, drugs, and chemicals.

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.

That portion of the electromagnetic spectrum immediately below the visible range and extending into the x-ray frequencies. The longer wavelengths (near-UV or biotic or vital rays) are necessary for the endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants.

The electronic transmission of radiological images from one location to another for the purposes of interpretation and/or consultation. Users in different locations may simultaneously view images with greater access to secondary consultations and improved continuing education. (From American College of Radiology, ACR Standard for Teleradiology, 1994, p3)

The spectrometric analysis of fluorescent X-RAYS, i.e. X-rays emitted after bombarding matter with high energy particles such as PROTONS; ELECTRONS; or higher energy X-rays. Identification of ELEMENTS by this technique is based on the specific type of X-rays that are emitted which are characteristic of the specific elements in the material being analyzed. The characteristic X-rays are distinguished and/or quantified by either wavelength dispersive or energy dispersive methods.

The relationship between the dose of administered radiation and the response of the organism or tissue to the radiation.

The articulation between a metacarpal bone and a phalanx.

Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. They are made synthetically by heating aluminum fluoride at 1000-2000 degrees C with silica and water vapor. (From Hawley's Condensed Chemical Dictionary, 11th ed)

Membranous appendage of fish and other aquatic organisms used for locomotion or balance.

The region of the HAND between the WRIST and the FINGERS.

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)

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).

Computer systems or networks designed to provide radiographic interpretive information.

X-RAY COMPUTERIZED TOMOGRAPHY with resolution in the micrometer range.

Elements of limited time intervals, contributing to particular results or situations.

The female sex chromosome, being the differential sex chromosome carried by half the male gametes and all female gametes in human and other male-heterogametic species.

A vacuum tube equipped with an electron emitting CATHODE and a fluorescent screen which emits visible light when excited by the cathode ray. Cathode ray tubes are used as imaging devises for TELEVISIONS; COMPUTER TERMINALS; TEXT TELECOMMUNICATION DEVICES; oscilloscopes; and other DATA DISPLAY devices.

Unstable isotopes of fluorine that decay or disintegrate emitting radiation. F atoms with atomic weights 17, 18, and 20-22 are radioactive fluorine isotopes.

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.

Traumatic injuries involving the cranium and intracranial structures (i.e., BRAIN; CRANIAL NERVES; MENINGES; and other structures). Injuries may be classified by whether or not the skull is penetrated (i.e., penetrating vs. nonpenetrating) or whether there is an associated hemorrhage.

The thin serous membrane enveloping the lungs (LUNG) and lining the THORACIC CAVITY. Pleura consist of two layers, the inner visceral pleura lying next to the pulmonary parenchyma and the outer parietal pleura. Between the two layers is the PLEURAL CAVITY which contains a thin film of liquid.

A form of pneumoconiosis caused by inhalation of asbestos fibers which elicit potent inflammatory responses in the parenchyma of the lung. The disease is characterized by interstitial fibrosis of the lung, varying from scattered sites to extensive scarring of the alveolar interstitium.

Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.

Incorrect diagnoses after clinical examination or technical diagnostic procedures.

Hospital department responsible for the administration and provision of immediate medical or surgical care to the emergency patient.

The measurement of radiation by photography, as in x-ray film and film badge, by Geiger-Mueller tube, and by SCINTILLATION COUNTING.

Unstable isotopes of cadmium that decay or disintegrate emitting radiation. Cd atoms with atomic weights 103-105, 107, 109, 115, and 117-119 are radioactive cadmium isotopes.

Inanimate objects that become enclosed in the body.

Individuals responsible for fabrication of dental appliances.

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.

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.

A subdiscipline of genetics that studies RADIATION EFFECTS on the components and processes of biological inheritance.

High-energy radiation or particles from extraterrestrial space that strike the earth, its atmosphere, or spacecraft and may create secondary radiation as a result of collisions with the atmosphere or spacecraft.

The largest of the TARSAL BONES which is situated at the lower and back part of the FOOT, forming the HEEL.

Diseases caused by factors involved in one's employment.

Quartz (SiO2). A glassy or crystalline form of silicon dioxide. Many colored varieties are semiprecious stones. (From Grant & Hackh's Chemical Dictionary, 5th ed)

Asbestos. Fibrous incombustible mineral composed of magnesium and calcium silicates with or without other elements. It is relatively inert chemically and used in thermal insulation and fireproofing. Inhalation of dust causes asbestosis and later lung and gastrointestinal neoplasms.

Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.

Three-dimensional computed tomographic imaging with the added dimension of time, to follow motion during imaging.

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.

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.

Substances used to allow enhanced visualization of tissues.

A chronic systemic disease, primarily of the joints, marked by inflammatory changes in the synovial membranes and articular structures, widespread fibrinoid degeneration of the collagen fibers in mesenchymal tissues, and by atrophy and rarefaction of bony structures. Etiology is unknown, but autoimmune mechanisms have been implicated.

The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation.

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.

Radiographic visualization of the body between the thorax and the pelvis, i.e., within the peritoneal cavity.

The ability of some cells or tissues to survive lethal doses of IONIZING RADIATION. Tolerance depends on the species, cell type, and physical and chemical variables, including RADIATION-PROTECTIVE AGENTS and RADIATION-SENSITIZING AGENTS.

Pathologic deposition of calcium salts in tissues.

Tumors or cancer of the LUNG.

A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.

Reduction of bone mass without alteration in the composition of bone, leading to fractures. Primary osteoporosis can be of two major types: postmenopausal osteoporosis (OSTEOPOROSIS, POSTMENOPAUSAL) and age-related or senile osteoporosis.

X-ray visualization of the chest and organs of the thoracic cavity. It is not restricted to visualization of the lungs.

Outgrowth of immature bony processes or bone spurs (OSTEOPHYTE) from the VERTEBRAE, reflecting the presence of degenerative disease and calcification. It commonly occurs in cervical and lumbar SPONDYLOSIS.

Breaks in bones.

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 second longest bone of the skeleton. It is located on the medial side of the lower leg, articulating with the FIBULA laterally, the TALUS distally, and the FEMUR proximally.

Radiography of the vascular system of the heart muscle after injection of a contrast medium.

A specialized CONNECTIVE TISSUE that is the main constituent of the SKELETON. The principle cellular component of bone is comprised of OSTEOBLASTS; OSTEOCYTES; and OSTEOCLASTS, while FIBRILLAR COLLAGENS and hydroxyapatite crystals form the BONE MATRIX.

Methods of creating machines and devices.

Unstable isotopes of oxygen that decay or disintegrate emitting radiation. O atoms with atomic weights 13, 14, 15, 19, and 20 are radioactive oxygen isotopes.

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 science, art, or technology dealing with processes involved in the separation of metals from their ores, the technique of making or compounding the alloys, the techniques of working or heat-treating metals, and the mining of metals. It includes industrial metallurgy as well as metallurgical techniques employed in the preparation and working of metals used in dentistry, with special reference to orthodontic and prosthodontic appliances. (From Jablonski, Dictionary of Dentistry, 1992, p494)

The first seven VERTEBRAE of the SPINAL COLUMN, which correspond to the VERTEBRAE of the NECK.

Methods and procedures for the diagnosis of diseases of the eye or of vision disorders.

A prediction of the probable outcome of a disease based on a individual's condition and the usual course of the disease as seen in similar situations.

The longest and largest bone of the skeleton, it is situated between the hip and the knee.

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.

Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.

The circulation of blood through the BLOOD VESSELS of the BRAIN.

Radiography of the bronchial tree after injection of a contrast medium.

The worsening of a disease over time. This concept is most often used for chronic and incurable diseases where the stage of the disease is an important determinant of therapy and prognosis.

The volume of air that is exhaled by a maximal expiration following a maximal inspiration.

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.

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)

Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.

The portion of the optic nerve seen in the fundus with the ophthalmoscope. It is formed by the meeting of all the retinal ganglion cell axons as they enter the optic nerve.

The scattering of x-rays by matter, especially crystals, with accompanying variation in intensity due to interference effects. Analysis of the crystal structure of materials is performed by passing x-rays through them and registering the diffraction image of the rays (CRYSTALLOGRAPHY, X-RAY). (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

That portion of the electromagnetic spectrum usually sensed as heat. Infrared wavelengths are longer than those of visible light, extending into the microwave frequencies. They are used therapeutically as heat, and also to warm food in restaurants.

Situations or conditions requiring immediate intervention to avoid serious adverse results.

The distal part of the arm beyond the wrist in humans and primates, that includes the palm, fingers, and thumb.

A synovial hinge connection formed between the bones of the FEMUR; TIBIA; and PATELLA.

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.

A plant genus in the family PINACEAE, order Pinales, class Pinopsida, division Coniferophyta. They are coniferous evergreen trees with long, flat, spirally arranged needles that grow directly from the branch.

Unanticipated information discovered in the course of testing or medical care. Used in discussions of information that may have social or psychological consequences, such as when it is learned that a child's biological father is someone other than the putative father, or that a person tested for one disease or disorder has, or is at risk for, something else.

LIGHT, it's processes and properties, and the characteristics of materials interacting with it.

Collective name for a group of external MECHANORECEPTORS and chemoreceptors manifesting as sensory structures in ARTHROPODS. They include cuticular projections (setae, hairs, bristles), pores, and slits.

The relative amounts of various components in the body, such as percentage of body fat.

Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time.

Age as a constituent element or influence contributing to the production of a result. It may be applicable to the cause or the effect of a circumstance. It is used with human or animal concepts but should be differentiated from AGING, a physiological process, and TIME FACTORS which refers only to the passage of time.

Storage-stable glycoprotein blood coagulation factor that can be activated to factor Xa by both the intrinsic and extrinsic pathways. A deficiency of factor X, sometimes called Stuart-Prower factor deficiency, may lead to a systemic coagulation disorder.

A highly vascularized extra-embryonic membrane, formed by the fusion of the CHORION and the ALLANTOIS. It is mostly found in BIRDS and REPTILES. It serves as a model for studying tumor or cell biology, such as angiogenesis and TISSUE TRANSPLANTATION.

An aspect of personal behavior or lifestyle, environmental exposure, or inborn or inherited characteristic, which, on the basis of epidemiologic evidence, is known to be associated with a health-related condition considered important to prevent.

Earth or other matter in fine, dry particles. (Random House Unabridged Dictionary, 2d ed)

Measurement of rate of settling of erythrocytes in anticoagulated blood.

Radiography of blood vessels after injection of a contrast medium.

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 which start with the identification of persons with a disease of interest and a control (comparison, referent) group without the disease. The relationship of an attribute to the disease is examined by comparing diseased and non-diseased persons with regard to the frequency or levels of the attribute in each group.

Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.

Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents.

The joint that is formed by the articulation of the head of FEMUR and the ACETABULUM of the PELVIS.

Electron microscopy involving rapid freezing of the samples. The imaging of frozen-hydrated molecules and organelles permits the best possible resolution closest to the living state, free of chemical fixatives or stains.

Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.

A single lung lesion that is characterized by a small round mass of tissue, usually less than 1 cm in diameter, and can be detected by chest radiography. A solitary pulmonary nodule can be associated with neoplasm, tuberculosis, cyst, or other anomalies in the lung, the CHEST WALL, or the PLEURA.

The technique that deals with the measurement of the size, weight, and proportions of the human or other primate body.

Unstable isotopes of thallium that decay or disintegrate emitting radiation. Tl atoms with atomic weights 198-202, 204, and 206-210 are thallium radioisotopes.

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.

Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.

The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.

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.

Unstable isotopes of cobalt that decay or disintegrate emitting radiation. Co atoms with atomic weights of 54-64, except 59, are radioactive cobalt isotopes.

Visualization of a vascular system after intravenous injection of a fluorescein solution. The images may be photographed or televised. It is used especially in studying the retinal and uveal vasculature.

A British colony in the western North Atlantic Ocean about 640 miles east southeast of Cape Hatteras, North Carolina. It comprises a group of about 300 islands of which only about 20 are inhabited. It is called also the Bermuda Islands or the Bermudas. It was named for the Spanish explorer Juan Bermudez who visited the islands in 1515. (From Webster's New Geographical Dictionary, 1988, p140 & Room, Brewer's Dictionary of Names, 1992, p61)

Measure of the maximum amount of air that can be expelled in a given number of seconds during a FORCED VITAL CAPACITY determination . It is usually given as FEV followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity.

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.

A chronic transmural inflammation that may involve any part of the DIGESTIVE TRACT from MOUTH to ANUS, mostly found in the ILEUM, the CECUM, and the COLON. In Crohn disease, the inflammation, extending through the intestinal wall from the MUCOSA to the serosa, is characteristically asymmetric and segmental. Epithelioid GRANULOMAS may be seen in some patients.

Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.

Any type of variation in the appearance of energy output of the sun. (NASA Thesaurus, 1994)

Conditions which produce injury or dysfunction of the second cranial or optic nerve, which is generally considered a component of the central nervous system. Damage to optic nerve fibers may occur at or near their origin in the retina, at the optic disk, or in the nerve, optic chiasm, optic tract, or lateral geniculate nuclei. Clinical manifestations may include decreased visual acuity and contrast sensitivity, impaired color vision, and an afferent pupillary defect.

Narrowing or constriction of a coronary artery.

The practice of sending a patient to another program or practitioner for services or advice which the referring source is not prepared to provide.

A plant species of the genus PINUS that contains isocupressic acid.

The creation and display of functional images showing where the blood is flowing into the MYOCARDIUM by following over time the distribution of tracers injected into the blood stream.

The veins and arteries of the HEART.

Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

Noninflammatory degenerative disease of the knee joint consisting of three large categories: conditions that block normal synchronous movement, conditions that produce abnormal pathways of motion, and conditions that cause stress concentration resulting in changes to articular cartilage. (Crenshaw, Campbell's Operative Orthopaedics, 8th ed, p2019)

An infant during the first month after birth.

The SKELETON of the HEAD including the FACIAL BONES and the bones enclosing the BRAIN.

Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics.

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.

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).

Fluid accumulation in the outer layer of the MACULA LUTEA that results from intraocular or systemic insults. It may develop in a diffuse pattern where the macula appears thickened or it may acquire the characteristic petaloid appearance referred to as cystoid macular edema. Although macular edema may be associated with various underlying conditions, it is most commonly seen following intraocular surgery, venous occlusive disease, DIABETIC RETINOPATHY, and posterior segment inflammatory disease. (From Survey of Ophthalmology 2004; 49(5) 470-90)

Care given during the period prior to undergoing surgery when psychological and physical preparations are made according to the special needs of the individual patient. This period spans the time between admission to the hospital to the time the surgery begins. (From Dictionary of Health Services Management, 2d ed)

A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.

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.

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).

Methods which attempt to express in replicable terms the extent of the neoplasm in the patient.

Unstable isotopes of nitrogen that decay or disintegrate emitting radiation. N atoms with atomic weights 12, 13, 16, 17, and 18 are radioactive nitrogen isotopes.

Radioactive substances added in minute amounts to the reacting elements or compounds in a chemical process and traced through the process by appropriate detection methods, e.g., Geiger counter. Compounds containing tracers are often said to be tagged or labeled. (Hawley's Condensed Chemical Dictionary, 12th ed)

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.

Unstable isotopes of copper that decay or disintegrate emitting radiation. Cu atoms with atomic weights 58-62, 64, and 66-68 are radioactive copper isotopes.

An autosomal recessive genetic disease of the EXOCRINE GLANDS. It is caused by mutations in the gene encoding the CYSTIC FIBROSIS TRANSMEMBRANE CONDUCTANCE REGULATOR expressed in several organs including the LUNG, the PANCREAS, the BILIARY SYSTEM, and the SWEAT GLANDS. Cystic fibrosis is characterized by epithelial secretory dysfunction associated with ductal obstruction resulting in AIRWAY OBSTRUCTION; chronic RESPIRATORY INFECTIONS; PANCREATIC INSUFFICIENCY; maldigestion; salt depletion; and HEAT PROSTRATION.

The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.

A noninvasive method for assessing BODY COMPOSITION. It is based on the differential absorption of X-RAYS (or GAMMA RAYS) by different tissues such as bone, fat and other soft tissues. The source of (X-ray or gamma-ray) photon beam is generated either from radioisotopes such as GADOLINIUM 153, IODINE 125, or Americanium 241 which emit GAMMA RAYS in the appropriate range; or from an X-ray tube which produces X-RAYS in the desired range. It is primarily used for quantitating BONE MINERAL CONTENT, especially for the diagnosis of OSTEOPOROSIS, and also in measuring BONE MINERALIZATION.

Examination of the interior of the eye with an ophthalmoscope.

Measurement of the index of refraction (the ratio of the velocity of light or other radiation in the first of two media to its velocity in the second as it passes from one into the other).

Unstable isotopes of gallium that decay or disintegrate emitting radiation. Ga atoms with atomic weights 63-68, 70 and 72-76 are radioactive gallium isotopes.

A non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiological procedures.

A substituted benzamide that has antipsychotic properties. It is a dopamine D2 receptor (see RECEPTORS, DOPAMINE D2) antagonist.

A collection of blood outside the BLOOD VESSELS. Hematoma can be localized in an organ, space, or tissue.

The production of an image obtained by cameras that detect the radioactive emissions of an injected radionuclide as it has distributed differentially throughout tissues in the body. The image obtained from a moving detector is called a scan, while the image obtained from a stationary camera device is called a scintiphotograph.

A membrane in the midline of the THORAX of mammals. It separates the lungs between the STERNUM in front and the VERTEBRAL COLUMN behind. It also surrounds the HEART, TRACHEA, ESOPHAGUS, THYMUS, and LYMPH NODES.

An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (Dictionary of Visual Science, 4th ed)

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).

The outer shorter of the two bones of the FOREARM, lying parallel to the ULNA and partially revolving around it.

The hollow, muscular organ that maintains the circulation of the blood.

The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals.

Timing the acquisition of imaging data to specific points in the cardiac cycle to minimize image blurring and other motion artifacts.

Unstable isotopes of iodine that decay or disintegrate emitting radiation. I atoms with atomic weights 117-139, except I 127, are radioactive iodine isotopes.

Behavior of LIGHT and its interactions with itself and materials.

The five long bones of the METATARSUS, articulating with the TARSAL BONES proximally and the PHALANGES OF TOES distally.

Death resulting from the presence of a disease in an individual, as shown by a single case report or a limited number of patients. This should be differentiated from DEATH, the physiological cessation of life and from MORTALITY, an epidemiological or statistical concept.

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 use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.

The concave interior of the eye, consisting of the retina, the choroid, the sclera, the optic disk, and blood vessels, seen by means of the ophthalmoscope. (Cline et al., Dictionary of Visual Science, 4th ed)

Three-dimensional representation to show anatomic structures. Models may be used in place of intact animals or organisms for teaching, practice, and study.

Computerised tomography of acute traumatic intracranial haematoma: reliability of neurosurgeons' interpretations. (1/28924)

Two neurosurgeons concerned with the emergency management of patients with head injury correctly diagnosed the presence or absence of an acute intracranial haematoma in 97 scans that were presented to them without knowledge of the patients' clinical details. There were no false-positives or false-negatives, although identification of the type of haematoma was not always possible. The impact of the EMI scan on patient management demands new approaches to the care of head injuries. (+info)

Evaluating cost-effectiveness of diagnostic equipment: the brain scanner case. (2/28924)

An approach to evaluating the cost-effectiveness of high-technology diagnostic equipment has been devised, using the introduction of computerised axial tomography (CAT) as a model. With the advent of CAT scanning, angiography and air encephalography have a reduced, though important, role in investigating intracranial disease, and the efficient use of conventional equipment requires the centralisation of neuroradiological services, which would result in major cash savings. In contrast, the pattern of demand for CAT scanning, in addition to the acknowledged clinical efficiency of the scanner and its unique role in the head-injured patient, ephasies the need for improved access to scanners. In the interest of the patients the pattern of service must change. (+info)

Comparative efficacy of positron emission tomography with FDG and computed tomographic scanning in preoperative staging of non-small cell lung cancer. (3/28924)

OBJECTIVE: To determine the sensitivity, specificity, and accuracy of positron emission tomography with 2-fluorine-18-fluorodeoxyglucose (PET-FDG) in the preoperative staging (N and M staging) of patients with lung cancer. The authors wanted to compare the efficacy of PET scanning with currently used computed tomography (CT) scanning. MATERIALS AND METHODS: Results of whole-body PET-FDG imaging and CT scans were compared with histologic findings for the presence or absence of lymph node disease or metastatic sites. Sampling of mediastinal lymph nodes was performed using mediastinoscopy or thoracotomy. RESULTS: PET-FDG imaging was significantly more sensitive, specific, and accurate for detecting N disease than CT. PET changed N staging in 35% and M staging in 11% of patients. CT scans helped in accurate anatomic localization of 6/57 PET lymph node abnormalities. CONCLUSION: PET-FDG is a reliable method for preoperative staging of patients with lung cancer and would help to optimize management of these patients. Accurate lymph node staging of lung cancer may be ideally performed by simultaneous review of PET and CT scans. (+info)

Parametric mapping of cerebral blood flow deficits in Alzheimer's disease: a SPECT study using HMPAO and image standardization technique. (4/28924)

This study assessed the accuracy and reliability of Automated Image Registration (AIR) for standardization of brain SPECT images of patients with Alzheimer's disease (AD). Standardized cerebral blood flow (CBF) images of patients with AD and control subjects were then used for group comparison and covariance analyses. METHODS: Thirteen patients with AD at an early stage (age 69.8+/-7.1 y, Clinical Dementia Rating Score 0.5-1.0, Mini-Mental State Examination score 19-23) and 20 age-matched normal subjects (age 69.5+/-8.3 y) participated in this study. 99mTc-hexamethyl propylenamine oxime (HMPAO) brain SPECT and CT scans were acquired for each subject. SPECT images were transformed to a standard size and shape with the help of AIR. Accuracy of AIR for spatial normalization was evaluated by an index calculated on SPECT images. Anatomical variability of standardized target images was evaluated by measurements on corresponding CT scans, spatially normalized using transformations established by the SPECT images. Realigned brain SPECT images of patients and controls were used for group comparison with the help of statistical parameter mapping. Significant differences were displayed on the respective voxel to generate three-dimensional Z maps. CT scans of individual subjects were evaluated by a computer program for brain atrophy. Voxel-based covariance analysis was performed on standardized images with ages and atrophy indices as independent variables. RESULTS: Inaccuracy assessed by functional data was 2.3%. The maximum anatomical variability was 4.9 mm after standardization. Z maps showed significantly decreased regional CBF (rCBF) in the frontal, parietal and temporal regions in the patient group (P < 0.001). Covariance analysis revealed that the effects of aging on rCBF were more pronounced compared with atrophy, especially in intact cortical areas at an early stage of AD. Decrease in rCBF was partly due to senility and atrophy, however these two factors cannot explain all the deficits. CONCLUSION: AIR can transform SPECT images of AD patients with acceptable accuracy without any need for corresponding structural images. The frontal regions of the brain, in addition to parietal and temporal lobes, may show reduced CBF in patients with AD even at an early stage of dementia. The reduced rCBF in the cortical regions cannot be explained entirely by advanced atrophy and fast aging process. (+info)

Detection of liver metastases from pancreatic cancer using FDG PET. (5/28924)

We evaluated the potential of the glucose analog [18F]fluorodeoxyglucose (FDG) as a PET tracer for the hepatic staging in 168 patients designated for resective pancreatic surgery. METHODS: Metastatic liver disease was confirmed or excluded during surgery or with CT follow-up for at least 6 mo. Proven metastases were then retrospectively identified on preoperative CT (gold standard). Hepatic PET scans of all patients were interpreted blindly. Any focal FDG uptake was considered malignant. Both proven hepatic metastases and suspicious hepatic PET lesions were then compared, lesion by lesion, with CT. Standardized uptake values (SUV) and tumor-to-liver ratios (T/L) were determined for the most intense lesion of each patient. RESULTS: Sensitivity of FDG PET was 68% (15 of 22 patients). The lesion detection rate was 97% (28 of 29 metastases) for lesions >1 cm and 43% (16 of 37 metastases) for lesions < or = 1 cm. Specificity was 95% (138 of 146 patients). Six of eight patients with false-positive results had marked intrahepatic cholestasis (versus 3 of 15 patients with true-positive lesions), one had an infrahepatic abscess and one had a right basal pulmonary metastasis. The SUV and T/L were 4.6+/-1.4 and 2.3+/-1.1, respectively, for malignant lesions and 4.1+/-1.5 and 1.9+/-0.3, respectively, for false-positive lesions and therefore are of limited value. CONCLUSION: FDG PET provides reliable hepatic staging for lesions >1 cm. False-positive results are associated with the presence of marked intrahepatic cholestasis. For lesions < or = 1 cm, FDG PET can define malignancy in 43% of suspicious CT lesions in the absence of dilated bile ducts. (+info)

Using vascular structure for CT-SPECT registration in the pelvis. (6/28924)

The authors outline a method for three-dimensional registration of pelvic CT and 111In-labeled monoclonal antibody capromab pendetide (111In MoAb 7E11.C5) images using 99mTc-labeled red blood cell SPECT data. METHODS: This method of CT-SPECT registration relies on the identification of major blood vessels in the CT and 99mTc SPECT images. The vessels are segmented from the image datasets by outlining them on transverse planar slices using a mouse-based drawing tool. Stacking the transverse outlines provides a three-dimensional representation of the vascular structures. Registration is performed by matching the surfaces of the segmented volumes. Dual isotope acquisition of 111In and 99mTc activities provides precise SPECT-SPECT registration so that registration in three dimensions of the 111In MoAb and CT images is achieved by applying the same transformation obtained from the 99mTc SPECT-CT registration. RESULTS: This method provided accurate registration of pelvic structures and significantly improved interpretation of 111In MoAb 7E11.C5 exams. Furthermore, sites of involvement by prostate cancer suggested by the 111In MoAb examination could be interpreted with the bony and soft tissue (nodal) anatomy seen on CT. CONCLUSION: This method is a general clinical tool for the registration of pelvic CT and SPECT imaging data. There are immediate applications in conformal radiation therapy treatment planning for certain prostate cancer patients. (+info)

Obturator internus muscle abscess in children: report of seven cases and review. (7/28924)

Obturator internus muscle (OIM) abscess is an uncommon entity often mistaken for septic arthritis of the hip. We describe seven children with OIM abscess and review seven previously reported cases. The most common presenting symptoms were hip or thigh pain (14 patients), fever (13), and limp (13). The hip was flexed, abducted, and externally rotated in 11 patients. Magnetic resonance imaging and computed tomography (CT) were diagnostic for OIM abscess in the 14 patients. Associated abscesses were located in the obturator externus muscle (5 patients), psoas muscle (2), and iliac muscle (1). The etiologic agents were Staphylococcus aureus (8 patients), Streptococcus pyogenes (2), Neisseria gonorrhoeae (2), and Enterococcus faecalis (1). Three patients underwent CT-guided percutaneous drainage, and three had surgical drainage. Three patients had ischial osteomyelitis in addition to OIM abscess. The 11 children with uncomplicated OIM abscess were treated for a median of 28 days. All patients had an uneventful recovery. (+info)

Lymphadenitis due to nontuberculous mycobacteria in children: presentation and response to therapy. (8/28924)

The most common manifestation of infection due to nontuberculous mycobacteria (NTM) in children is cervical lymphadenitis in an otherwise healthy patient. We identified and reviewed 19 cases of proven or presumptive lymphadenitis due to NTM seen at our hospital over the course of 13 months. Nine patients underwent initial surgical excision of involved lymph nodes. Ten children did not have involved lymph nodes excised initially and were treated with macrolide-containing antibiotic regimens. Of these patients, five required subsequent surgical excision and five were cured with combination chemotherapy. Six patients underwent radiographic imaging of the head and neck that revealed asymmetrical adenopathy with ring-enhancing masses but minimal inflammatory stranding of the subcutaneous fat, a finding that may distinguish adenitis caused by NTM from staphylococcal and streptococcal adenitis. Our data suggest that if surgical excision is not considered feasible, antimicrobial therapy for adenitis due to NTM may be beneficial for some patients. (+info)

The computed tomography dose index (CTDI) is a commonly used radiation exposure index in X-ray computed tomography (CT), first ... "A method for describing the doses delivered by transmission x-ray computed tomography". Medical Physics. 8 (4): 488-495. ... Geleijns, J; Salvadó Artells, M; de Bruin, P W; Matter, R; Muramatsu, Y; McNitt-Gray, M F (21 May 2009). "Computed tomography ... "A preliminary study of the novel application of normoxic polymer gel dosimeters for the measurement of CTDI on diagnostic x-ray ...

https://en.wikipedia.org/wiki/Computed_tomography_dose_index

History of computing, History of medical imaging, X-ray computed tomography). ... The history of X-ray computed tomography dates back to at least 1917 with the mathematical theory of the Radon transform In ... Before computed tomography, tomographic images could be made by radiography using focal plane tomography, representing a single ... "Do we really need to thank the Beatles for the financing of the development of the computed tomography scanner?". Journal of ...

https://en.wikipedia.org/wiki/History_of_computed_tomography

... (QCT) is a medical technique that measures bone mineral density (BMD) using a standard X-ray ... peripheral quantitative computed tomography, commonly abbreviated pQCT, is a type of quantitative computed tomography (QCT), ... Dual energy X-ray absorptiometry (DXA) J. E. Adams, "Quantitative computed tomography.," European journal of radiology, vol. 71 ... Reflections on Development of Quantitative Computed Tomography K. Engelke, A. Mastmeyer, V. Bousson, T. Fuerst, J.-D. Laredo, ...

https://en.wikipedia.org/wiki/Quantitative_computed_tomography

... (PCCT) is a form of X-ray computed tomography (CT) in which X-rays are detected using a ... Roessl E, Proksa R (August 2007). "K-edge imaging in x-ray computed tomography using multi-bin photon counting detectors". ... "FDA Clears First Major Imaging Device Advancement for Computed Tomography in Nearly a Decade".{{cite web}}: CS1 maint: url- ... This can either be used to increase the image quality at the same X-ray exposure level, or to lower the patient X-ray dose ...

https://en.wikipedia.org/wiki/Photon-counting_computed_tomography

X-ray computed tomography, Respiratory system imaging). ... Computed tomography of the chest is a group of CT scan ... It included non-contrasted CT scan of the lungs such as High-resolution computed tomography to look for disorders of lung ...

https://en.wikipedia.org/wiki/Computed_tomography_of_the_chest

... flat panel CT or Digital Volume Tomography (DVT)) is a medical imaging technique consisting of X-ray computed tomography where ... Health, Center for Devices and Radiological (28 September 2020). "Medical X-ray Imaging - Dental Cone-beam Computed Tomography ... CS1: long volume value, Wikipedia articles needing clarification from March 2016, Dentistry, X-ray computed tomography). ... "Dosimetry of a cone-beam computed tomography machine compared with a digital x-ray machine in orthodontic imaging". American ...

https://en.wikipedia.org/wiki/Cone_beam_computed_tomography

Creative Commons Attribution 4.0 International License (X-ray computed tomography). ... Yet, focal and diffuse thyroid abnormalities are commonly encountered during the interpretation of computed tomography (CT) ... Cross-sectional imaging including computed tomography (CT) and magnetic resonance imaging (MRI) detect incidental thyroid ... "Thyroid computed tomography imaging: pictorial review of variable pathologies". Insights into Imaging. 7 (4): 601-617. doi: ...

https://en.wikipedia.org/wiki/Computed_tomography_of_the_thyroid

The major difference is that CTLM uses near-infrared light, not X-ray, to produce the images. The patient lies on a padded ... Computed tomography laser mammography (CTLM) is the trademark of Imaging Diagnostic Systems, Inc. (IDSI, United States) for its ... The technology uses laser in the same way computed tomography uses X-Rays, these beams travel through tissue and suffer ... CTLM-section on Imaging Diagnostic Systems website CTLM on Google Scholar Grable R.J. et al., Optical computed tomography for ...

https://en.wikipedia.org/wiki/Computed_tomography_laser_mammography

... (CT) scanning is any computer-aided tomographic process, usually X-ray computed tomography, that ... form using computed tomography CT Image-based finite element method converts the 3D image data from X-ray computed tomography ... Industrial radiography Cone beam computed tomography PCB reverse engineering, an application of industrial CT Flisch, A., et al ... "Reducing Preproduction Inspection Costs with Industrial (CT) Computed Tomography." Micro Manufacturing Magazine for the global ...

https://en.wikipedia.org/wiki/Industrial_computed_tomography

CS1 maint: others, Articles with short description, Short description matches Wikidata, Radiology, X-ray computed tomography). ... Computed tomography enterography (CT enterography, CTE) is a medical imaging technique which uses computed tomography scanner ... Park, Seong Ho; Ye, Byong Duk; Lee, Tae Young; Fletcher, Joel G. (September 2018). "Computed Tomography and Magnetic Resonance ... Detector Computed Tomography (CT) Enterography - A Novel Technique Unfolding an Archaic Disease". Polish Journal of Radiology. ...

https://en.wikipedia.org/wiki/Computed_tomography_enterography

Official website Journal of Cardiovascular Computed Tomography, published by the society (Circulatory system, X-ray computed ... Computed Tomography is a United States-based medical specialty professional society in the field of X-ray computed tomography ... Berman, D. S.; Achenbach, S.; Taylor, A. J.; Weigold, G.; Poon, M.; Society of Cardiovascular Computed Tomography (2007). " ... Founded in 2005, the Society of Cardiovascular Computed Tomography (SCCT) is the international professional society devoted ...

https://en.wikipedia.org/wiki/Society_of_Cardiovascular_Computed_Tomography

Articles with short description, Short description matches Wikidata, Commons category link is on Wikidata, X-ray computed ... Computed tomography of the head uses a series of X-rays in a CT scan of the head taken from many different directions; the ... Computed tomography (CT) has become the diagnostic modality of choice for head trauma due to its accuracy, reliability, safety ... "Head CT (Computed Tomography, CAT scan)". Radiological Society of North America (RSNA) and American College of Radiology. June ...

https://en.wikipedia.org/wiki/Computed_tomography_of_the_head

Quantitative computed tomography (QCT) In the past 20 years, Computer Layer (CT) has been widely used in the field of clinical ... Similar to DPA, the basic principle of DXA is to measure the high and low energy X-ray transmission of stable X-ray sources. ... A comparison of plain radiographs with single- and dual-photon absorptiometry and with quantitative computed tomography". ... Adams, Judith E. (2009). "Quantitative computed tomography". European Journal of Radiology. 71 (3): 415-424. doi:10.1016/j. ...

https://en.wikipedia.org/wiki/Single_photon_absorptiometry

... can be divided into transmission and reflection mode. It acts as an extension of X-ray computed tomography ... T-ray computed tomography. , 27(15), 1312-4 Wang, S, & Zhang, X-C. . Pulsed terahertz tomography. Journal of Physics D Applied ... Terahertz computed tomography records both amplitude and spectral phase information when compared to X-ray imaging. Terahertz ... 362(1815): p. 283-298 Gbur, G., & Wolf, E. (2001). Relation between computed tomography and diffraction tomography. Journal of ...

https://en.wikipedia.org/wiki/Terahertz_tomography

X-ray computed tomography). ... Cone Beam Computed Tomography. Taylor & Francis. pp. 35-. ISBN ... Computed tomography Industrial CT scanning Tomographic reconstruction Chris C. Shaw (14 February 2014). ... An X-ray source is positioned across from the detector, with the object being scanned in between. (This is essentially the same ... In microtomography X-ray scanners, cone beam reconstruction is one of two common scanning methods, the other being Fan beam ...

https://en.wikipedia.org/wiki/Cone_beam_reconstruction

Dose in x-ray computed tomography. Phys Med Biol 2014; 59 R129-R150 [10] Kalender WA, Beister M, Boone JM, Kolditz D, Vollmar ... An integral approach to vertebral bone mineral analysis by X-ray computed tomography. Radiology 1987; 164:419-423 [2] Kalender ... Eur Radiol 2017; 27:1081-1087 [12] The 4th edition of the textbook "Computed Tomography" by WA Kalender, published by Publicis ... Kalender developed volumetric spiral computed tomography; the world's first clinical spiral CT studies were presented at RSNA ...

https://en.wikipedia.org/wiki/Willi_A._Kalender

doi:10.1002/047084289X.rl121.pub2 Lusic, Hrvoje; Grinstaff, Mark W. (2013). "X-ray-Computed Tomography Contrast Agents". ...

https://en.wikipedia.org/wiki/Lithium_iodide

Computed tomography may also be used. Scapular fractures can be detected in the standard chest and shoulder radiographs that ... Lateral view of the left scapula Most fractures of the scapula can be seen on a chest X-ray; however, they may be missed during ... Imaging techniques such as X-ray are used to diagnose scapular fracture, but the injury may not be noticed in part because it ...

https://en.wikipedia.org/wiki/Scapular_fracture

In computed tomography (CT scanning) an X-ray source and its associated detectors rotate around the subject which itself moves ... 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 ... MedPix Medical Image Database Video on X-ray inspection and industrial computed tomography, Karlsruhe University of Applied ...

https://en.wikipedia.org/wiki/Radiography

X-ray microtomography "ACR-STR Practice Parameter for the Performance of High-Resolution Computed Tomography (HRCT) of the ... High-resolution computed tomography (HRCT) is a type of computed tomography (CT) with specific techniques to enhance image ... Thukral CL, Singh A, Singh S, Sood AS, Singh K (September 2015). "Role of High Resolution Computed Tomography in Evaluation of ... Worthy S (March 1995). "High resolution computed tomography of the lungs". BMJ. 310 (6980): 615-6. doi:10.1136/bmj.310.6980.616 ...

https://en.wikipedia.org/wiki/High-resolution_computed_tomography

... , like tomography and X-ray computed tomography, uses X-rays to create cross-sections of a physical object ... These pixel sizes have also resulted in the terms high-resolution X-ray tomography, micro-computed tomography (micro-CT or µCT ... Typically used in human computed tomography systems. The cone-beam system is based on a 2D X-ray detector (camera) and an ... "Airway dimensions measured from micro-computed tomography and high-resolution computed tomography", Eur Respir J, 28 (4): 712- ...

https://en.wikipedia.org/wiki/X-ray_microtomography

The Golden S sign can be seen on plain radiographs as well as on computed tomography (CT) scans of the chest. The sign is seen ... He was (twice) president of the Roentgen Ray Society as well as a trustee of the New York Academy of Medicine, and chairman of ... 13 (21). Reinig JW, Ross P (July 1984). "Computed tomography appearance of Golden's "S" sign". J Comput Tomogr. 8 (3): 219-23. ... Golden R (1925). "The effect of bronchostenosis upon the roentgen ray shadow in carcinoma of the bronchus". Am J Roentgenol. ...

https://en.wikipedia.org/wiki/Golden_S_sign

X-ray computed tomography, Respiratory system imaging). ... is a medical diagnostic test that employs computed tomography ( ... 13 (7). Gossner J (2012-09-25). "Feasibility of computed tomography pulmonary angiography with low flow rates". Journal of ... Schoepf UJ, Goldhaber SZ, Costello P (May 2004). "Spiral computed tomography for acute pulmonary embolism". Circulation. 109 ( ... The best results are obtained using multidetector computed tomography (MDCT) scanners. An intravenous cannula is required for ...

https://en.wikipedia.org/wiki/CT_pulmonary_angiogram

Whiting, Bruce R. (3 May 2002). "Signal statistics in x-ray computed tomography". Medical Imaging 2002: Physics of Medical ... There has been applications to insurance claims and x-ray computed tomography. Compound Poisson process Hermite distribution ... "Efficient and accurate likelihood for iterative image reconstruction in x-ray computed tomography". Medical Imaging 2003: Image ... "Properties of preprocessed sinogram data in x-ray computed tomography". Medical Physics. 33 (9): 3290-3303. Bibcode:2006MedPh.. ...

https://en.wikipedia.org/wiki/Compound_Poisson_distribution

5,000 patient dose measurements from 375 hospitals) Brenner, David J.; Hall, Eric J. (2007). "Computed Tomography - an ... Hart, D.; Wall, B. F. (2002). Radiation Exposure of the UK Population from Medical and Dental X-ray Examinations (PDF). ... Wall, B. F.; Hart, D. (1997). "Revised Radiation Doses for Typical X-Ray Examinations". The British Journal of Radiology. 70 ( ...

https://en.wikipedia.org/wiki/Sievert

"Diagnosis? It's Deductible". (CS1: long volume value, X-ray computed tomography). ... If computed tomography (CAT) scan technology is used, it is known as a full-body CT scan, though many medical imaging ... Clinical Radiology 71 (5): 427 - 431 Brant-Zawadzki MN (November 2005). "The role of computed tomography in screening for ... Full body scanner Medical imaging Backscatter X-ray (for security scanning) Millimeter wave scanner (for security scanning) ...

https://en.wikipedia.org/wiki/Full-body_CT_scan

"Ptychographic X-ray computed tomography at the nanoscale". Nature. 467 (7314): 436-439. Bibcode:2010Natur.467..436D. doi: ... Further Pfeiffer is known for his research in X-ray Ptychography, X-ray tensor tomography, grating-based Neutron ... In 2006 he demonstrated the feasibility of phase sensitive X-ray imaging with conventional, polychromatic X-ray sources and a ... "Six-dimensional real and reciprocal space small-angle X-ray scattering tomography". Nature. 527 (7578): 353-356. Bibcode: ...

https://en.wikipedia.org/wiki/Franz_Pfeiffer_(physicist)

September 2010). "Ptychographic X-ray computed tomography at the nanoscale". Nature. 467 (7314): 436-439. Bibcode:2010Natur.467 ... In the latter case, the (linear) phase signal is also ideal for high-resolution X-ray ptychographic tomography. The strength ... X-ray ptychography at a small-angle scattering beamline of a synchrotron. This x-ray ptychograph of a zone plate shows the ... Ptychographic imaging, along with advances in detectors and computing, has resulted in the development of X-ray microscopes. ...

https://en.wikipedia.org/wiki/Ptychography

Bouyssie, JF; Bouyssie S; Sharrock P; Duran D (1997). "Stereolithographic models derived from x-ray computed tomography. ... 19 (3): 193-9. Winder, RJ; Bibb, R (2009). "A Review of the Issues Surrounding Three-Dimensional Computed Tomography for ...

https://en.wikipedia.org/wiki/Stereolithography

Industrial CT (computed tomography), a process that uses X-ray equipment to produce three-dimensional representations of ... short silent comedy film X-ray absorption spectroscopy X-ray marker X-ray nanoprobe X-ray reflectivity X-ray vision X-ray ... Momose A, Takeda T, Itai Y, Hirano K (April 1996). "Phase-contrast X-ray computed tomography for observing biological soft ... Spellings of X-ray(s) in English include the variants x-ray(s), xray(s), and X ray(s). The most familiar use of X-rays is ...

https://en.wikipedia.org/wiki/X-ray

Other services include CSSD Services, Pharmacy, Occupational Services, X-ray Services with Computed Tomography (CT), Magnetic ...

https://en.wikipedia.org/wiki/Frere_Hospital

This has concentrated recently on computed X-ray tomography and strain mapping by digital image correlation and digital volume ... Professor James specialises in physical metallurgy, micromechanics, and X-ray crystallography of engineering materials, mainly ... correlation, together with X-ray and neutron diffraction. He applies these techniques to studies of the degradation of ...

https://en.wikipedia.org/wiki/James_Marrow

Computed tomography provides an overall better surgical strategy planning, and possibly less unnecessary laparotomies. ... An abdominal x-ray is an x-ray of the abdomen. It is sometimes abbreviated to AXR, or KUB (for kidneys, ureters, and urinary ... X-ray Acute abdomen Abdominal pain Medical imaging Chest x-ray Radiographer "Radiology - Acute indications". Royal Children's ... Abdominal x-ray is therefore not recommended for adults with acute abdominal pain presenting in the emergency department. The ...

https://en.wikipedia.org/wiki/Abdominal_x-ray

... of the projections of the datacube in a manner analogous to the X-ray projections measured by medical X-ray computed tomography ... The computed tomography imaging spectrometer (CTIS) is a snapshot imaging spectrometer which can produce in fine the three- ... A fast reconstruction algorithm for computed tomography imaging spectrometer (CTIS) is documented in the paper: Larz White, W. ... Ford, Bridget K.; Descour, Michael R.; Lynch, Ronald M. (2001-10-22). "Large-image-format computed tomography imaging ...

https://en.wikipedia.org/wiki/Computed_tomography_imaging_spectrometer

Computed tomography angiography (CTA), an imaging methodology using a ring-shaped machine with an X-ray source spinning around ... A coronary CT calcium scan is a computed tomography (CT) scan of the heart for the assessment of severity of coronary artery ... Single photon emission computed tomography (SPECT), a nuclear medicine imaging methodology using gamma rays emitted by a ... computed tomography (CT), or nuclear medicine (NM) imaging with PET or SPECT. These cardiac techniques are otherwise referred ...

https://en.wikipedia.org/wiki/Cardiac_imaging

Magnetic resonance imaging (MRI) and single-photon emission computed tomography (SPECT) are two of the tests that can identify ... Ryan KJ, Ray CG, eds. (2004). Sherris Medical Microbiology (4th ed.). McGraw Hill. pp. 434-37. ISBN 978-0-8385-8529-0. Smith- ...

https://en.wikipedia.org/wiki/Lyme_disease

Pr based solid state X-ray detectors have been successfully reintroduced to X-ray sampling in medical computed tomography ( ... The other disadvantage is the high X-ray damage to the sample. Terbium-activated gadolinium oxysulfide is frequently used as a ... These characteristics lead to a high interaction probability for X-ray radiation. Several synthesis routes have been developed ... scintillator for x-ray imaging. It emits wavelengths between 382-622 nm, though the primary emission peak is at 545 nm. It is ...

https://en.wikipedia.org/wiki/Gadolinium_oxysulfide

Photon-counting computed tomography is another interest area, which is rapidly evolving and is approaching clinical feasibility ... One way of reducing exposures is to make X-ray detectors as efficient as possible, so that lower doses can be used for a given ... "First 3D colour X-ray of a human using CERN technology". CERN. Retrieved 2020-11-23. "New 3D colour X-rays made possible with ... Shikhaliev, M (2015). "Medical X-ray and CT Imaging with Photon-Counting Detectors". In Iwanczyk, Jan S. (ed.). Radiation ...

https://en.wikipedia.org/wiki/Photon_counting

Echocardiography Spiral Computed Tomography, Color Doppler and Ultrasonography Renal Transplantation and Renal Hemodialysis ... Niraula, Kiran (2018). "Per Operative X Ray of Pakistan's First patient who under went Spinal Cord Stimulation". Facebook. ...

https://en.wikipedia.org/wiki/Mayo_Hospital

Computed tomography and MRI scanning are the most common imaging modalities employed for this Digital Autopsy. Furthermore, CT ... The main constraint is the data that is provided by medical imaging modalities are based on X-Ray and Magnetic fields (CT and ... Radiologists may call it Post-mortem Computed Tomography (PMCT) that does not provide colourful 3D views. In Switzerland, it is ... "Correlation between computed tomography and autopsy in premature and full-term neonates that have suffered perinatal asphyxia ...

https://en.wikipedia.org/wiki/Digital_autopsy

... and the medical centre is fitted with x-ray computed tomography (CT), magnetic resonance imaging (MRI) and ultrasound scanners ...

https://en.wikipedia.org/wiki/Trafford_Training_Centre

"Complete Preoperative Evaluation of Pulmonary Atresia with Ventricular Septal Defect with Multi-Detector Computed Tomography". ... Ultrasound Pulse oximetry Chest X-ray Echocardiogram Electrocardiogram Cardiac catheterization Cardiac CT scan Genetic testing ... well-developed major aortopulmonary collateral arteries demonstrated by multidetector computed tomography". Circulation. 124 ( ...

https://en.wikipedia.org/wiki/Pulmonary_atresia_with_ventricular_septal_defect

Evaluation of patient history and possible exposure to a known causative agent High-Resolution Computed Tomography (HRCT) ... A chest X-ray or CT is necessary to differentiate between pneumonitis and pneumonia of an infectious etiology. Some degree of ... Since pneumonitis manifests in all areas of the lungs, imaging such as chest x-rays and Computerized tomography (CT) scans are ...

https://en.wikipedia.org/wiki/Pneumonitis

Computational geophysics Computational magnetohydrodynamics Computational physics Computed radiography Computed tomography ... Cosmic microwave background radiation Cosmic neutrino background Cosmic noise Cosmic ray Cosmic ray spallation Cosmic ray ... Conductivity of transparency Conductor gallop Cone beam computed tomography Configuration interaction Configuration space ... quantum computing) Concurrence principle Condensation Condensation (aerosol dynamics) Condensed Matter Condensed matter physics ...

https://en.wikipedia.org/wiki/Index_of_physics_articles_(C)

October 1 - Godfrey Hounsfield's invention, X-ray computed tomography, is first used on a patient with a cerebral cyst at ... Ray Tomlinson sends the first ARPAnet e-mail between host computers, at BBN, Cambridge, Massachusetts, with the first use of ... Retrieved 2011-10-05.. Tomlinson, Ray. "The First Network Email". Archived from the original on 2006-05-06. Retrieved 2011-10- ... Proceedings of the Third Annual ACM Symposium on Theory of Computing. pp. 151-158. doi:10.1145/800157.805047. ISBN ...

https://en.wikipedia.org/wiki/1971_in_science

May 2013). "Cancer risk in 680,000 people exposed to computed tomography scans in childhood or adolescence: data linkage study ... Oliver, C. P. (10 January 1930). "The Effect of Varying the Duration of X-Ray Treatment Upon the Frequency of Mutation". ...

https://en.wikipedia.org/wiki/Linear_no-threshold_model

A computed tomography (CT) scan is also a good diagnostic tool, as it detects calcification in the tumor. Two distinct types ... so contain deposits of calcium that are evident on an X-ray. A physician can conduct a few scans and tests to diagnose a person ...

https://en.wikipedia.org/wiki/Craniopharyngioma

An X-ray Magnetic resonance imaging (MRI), which usually provides the most information Computed tomography (CT) scan If there ...

https://en.wikipedia.org/wiki/Basilar_invagination

... tomography Positron emission tomography Crowther criterion X-ray computed tomography tomviz tomography software imod tomography ... Electron tomography (ET) is a tomography technique for obtaining detailed 3D structures of sub-cellular, macro-molecular, or ... Recently, atomic resolution in 3D electron tomography reconstructions has been demonstrated. ADF-STEM tomography has recently ... Another method of obtaining a tilt-series is the so-called conical tomography method, in which the sample is tilted, and then ...

https://en.wikipedia.org/wiki/Electron_tomography

X-ray computed tomography). ... Computed tomography angiography (also called CT angiography or ... is a computed tomography technique used for angiography-the visualization of arteries and veins-throughout the human body. ... "Estimating risk of cancer associated with radiation exposure from 64-slice computed tomography coronary angiography". JAMA. 298 ...

https://en.wikipedia.org/wiki/Computed_tomography_angiography

... or industrial computed tomography can help with detection and analysis of certain defects. The heat-affected zone (HAZ) is a ... and x-ray welding. Like the first welding process, forge welding, some modern welding methods do not involve the melting of the ...

https://en.wikipedia.org/wiki/Welding

... an X-ray computed tomography was taken of Canute, which showed that he was right-handed and of a slender build. It also ...

https://en.wikipedia.org/wiki/Canute_IV_of_Denmark

Brenner DJ, Hall EJ (November 2007). "Computed tomography-an increasing source of radiation exposure". The New England Journal ... These factors include: Possible harms from the screening test: for example, X-ray images involve exposure to potentially ... "Advances in kilovoltage x-ray beam dosimetry". Physics in Medicine and Biology. 59 (6): R183-231. Bibcode:2014PMB....59R.183H. ...

https://en.wikipedia.org/wiki/Cancer

... of using MRI as the imaging modality is the patient isn't exposed to radiation as they would be from computed tomography (CT ... scan) and x-ray imaging. MRI also has better image quality than other imaging modalities and is better able to distinguish ...

https://en.wikipedia.org/wiki/MRI_Robot

A chest x-ray is useful to confirm or rule out a pneumothorax, pulmonary edema, or pneumonia. Spiral computed tomography with ... A chest x-ray can be useful to differentiate pneumonia from congestive heart failure. As the cause is usually a bacterial ...

https://en.wikipedia.org/wiki/Shortness_of_breath

Neuroimaging techniques such as Computed Tomography (CT) scan or Magnetic Resonance imaging (MRI) are typically used to detect ... Feigenbaum A, Moore R, Clarke J, Hewson S, Chitayat D, Ray PN, Stockley TL (January 2004). "Canavan disease: carrier-frequency ...

https://en.wikipedia.org/wiki/Spongy_degeneration_of_the_central_nervous_system

... for single photon emission computed tomography, and for X-ray computed tomography. The OSEM method is related to the ... method is an iterative method that is used in computed tomography. In applications in medical imaging, the OSEM method is used ...

https://en.wikipedia.org/wiki/Ordered_subset_expectation_maximization

A newly emerging X-ray computed tomography technique that uses ptychographic X-ray imaging - which can extract detailed phase ... Here we describe an X-ray computed tomography technique that generates quantitative high-contrast three-dimensional electron ... X-ray tomography is an invaluable tool in biomedical imaging. It can deliver the three-dimensional internal structure of entire ... High-resolution quantitative tomography of this type may find applications in biomedicine and in microanalysis of fossils as ...

https://www.nature.com/articles/nature09419?error=cookies_not_supported&code=612885b3-1a24-4454-9af6-f4930f510ac6

X-Ray Computed Tomography (CT) Performance Evaluation. B89.4.23 - 2020. Publisher:. ASME ... L0942Q - X-Ray Computed Tomography (CT) Performance Evaluation has been added to your cart. ... This standard provides definitions and a test procedure for the performance evaluation of X-ray CT systems used for 3D ...

https://www.asme.org/codes-standards/find-codes-standards/b89-4-23-x-ray-computed-tomography-performance-evaluation

US-6493415-B1 chemical patent summary.

https://pubchem.ncbi.nlm.nih.gov/patent/US-6493415-B1

... Languages. * DEdisabled ... 4] Bircher B A, Meli F, Küng A and Thalmann R 2020 METAS-CT: Metrological X-ray computed tomography at sub-micrometre precision ... X-ray computed tomography (XCT) is increasingly used to dimensionally characterise workpieces. Here, we present micro- ... Küng A and Thalmann R 2020 X-ray flat-panel detector geometry correction to improve dimensional computed tomography ...

https://www.sem.admin.ch/metas/en/home/fabe/laenge/computed-tomography.html

Data Integrity Issues for Micro-Computed X-Ray Tomography (µ-CT) in Forensic Applications. Presenting section:. Engineering & ...

https://www.aafs.org/research/data-integrity-issues-micro-computed-x-ray-tomography-m-ct-forensic-applications

Spine X-Ray and Computed Tomography market growth drivers are rapid innovations in computed tomography resulted in the ... Spine X Ray and Computed Tomography Market Size Worth USD 1,589.9 Million in 2030 Published Date : 2022-09-08 Request Free ... Spine X-ray and computed tomography operate through the principle of emitting X-rays from a source into an object or patient. ... Spine X-ray and computed tomography operate on the principle of emitting X-radiations that pass through a patients body and ...

https://www.emergenresearch.com/amp/press-release/global-spine-x-ray-and-computed-tomography-market

X-ray computed tomography (MicroCT) is a powerful tool for non-destructively imaging the interior 3-dimensional microstructure ... An X-ray Micro-Computed Tomography Facility with in-situ/in operando testing.. ... Micro-scale computed tomography at the proposed advanced level will give researchers a massively improved insight into ... The Zeiss Xradia 620 Versa is a state-of-the-art X-ray Microscope with innovative optics, optimised for 3D non-destructive ...

https://gow.epsrc.ukri.org/NGBOViewGrant.aspx?GrantRef=EP/T006390/1

A comparison of three-dimensional-printed porous rocks with nano x-ray computed tomography: Silica sand, gypsum powder, and ... A comparison of three-dimensional-printed porous rocks with nano x-ray computed tomography: Silica sand, gypsum powder, and ... First, a digital rock model based on Berea Sandstone was created with computed microtomography imaging; then the image was ... The replicas were examined by computed nanotomography imaging to compare the resemblance of internal pore structures to the ...

https://pubs.geoscienceworld.org/aapgbull/article-abstract/105/11/2245/608260/A-comparison-of-three-dimensional-printed-porous?redirectedFrom=PDF

... for 73 years were systematically analysed by three-dimensional imaging at high resolution using X-ray micro-computed tomography ... Raman spectroscopy and X-ray diffraction. In addition, mineralized microbial structures were also observed as significant ... X-ray micro-computed tomography analysis of accumulated corrosion products in deep-water shipwrecks ... for 73 years were systematically analysed by three-dimensional imaging at high resolution using X-ray micro-computed tomography ...

https://ro.ecu.edu.au/ecuworkspost2013/7185/

"Three dimensional quantitative textural analysis of nickel sulphide ore using X-ray computed tomography and grey level co- ... Jardine, M. (2016). Three dimensional quantitative textural analysis of nickel sulphide ore using X-ray computed tomography and ... In this study, the use of 3D X-ray computed tomography (XCT) is proposed as an innovative solution to non-destructively image ... Three dimensional quantitative textural analysis of nickel sulphide ore using X-ray computed tomography and grey level co- ...

https://open.uct.ac.za/handle/11427/20489

X-ray micro computed tomography (X-ray micro CT) was used as a non-destructive technique to monitor the effect of fungal damage ... Monitoring fungal infection in maize with high resolution X-ray micro computed tomography. Orina, Irene Nyangoge (2018-03) ... X-ray images of control and infected kernels were acquired post inoculation using high resolution X-ray micro CT over time. ... This study demonstrated that, although X-ray micro CT cannot be used as a rapid technique for detection of fungal infection ...

https://scholar.sun.ac.za/handle/10019.1/103377

Home,Accuracy of surface topography measurements performed by X-ray computed tomography on additively manufactured metal parts ... Accuracy of surface topography measurements performed by X-ray computed tomography on additively manufactured metal parts. ...

https://www.euspen.eu/resource/accuracy-of-surface-topography-measurements-performed-by-x-ray-computed-tomography-on-additively-manufactured-metal-parts/

X-Ray Computed Tomography (CT) Scanning & Battery Cells ... Home , X-Ray Computed Tomography (CT) Scanning & Battery Cells ... X-Ray Computed Tomography (CT) Scanning & Battery Cells. October 20, 2016 Next-generation energy storage technologies, such as ... Technologies such as x-ray computed tomography are providing engineers and researchers with the information needed to more ... X-ray CT scanning has proven to be an excellent method to obtain internal, three-dimensional data in a non-destructive manner. ...

https://nts.com/ntsblog/x-ray-computed-tomography-ct-scanning-battery-cells/

X-Ray Computed Tomography For Non-Destructive Evaluation In The EV Market. Oct 19, 2022, 9:15 am EDT ... Workflows For Assessing Lithium-Ion Battery Cells With Computed Tomography And High-Resolution 3D X-Ray Microscopes. Presented ... This presentation introduces workflows that combine high-resolution X-ray microscopy and computed tomography to generate ... Herminso Villarraga-Gómez, PhD, Product Manager , X-ray Quality Solutions, ZEISS Industrial Quality Solutions ...

https://chargedevs.com/apr-2022-session/workflows-for-assessing-lithium-ion-battery-cells-with-computed-tomography-and-high-resolution-3d-x-ray-microscopes/

Recently, a high-resolution gamma ray computed tomography measurement system was presented, to analyse processes at ... 5th World Congress on Industrial Process Tomography. Gamma Ray Computed Tomography for Fast Rotating Objects. ...

https://isipt.org/world-congress/5/616.html

Positron Emission Tomography (PET) Scanners Market Published : January 2022 Healthcare. Robotic X-ray Scanner Market Published ... Veterinary Computed Tomography Scanner Market. Veterinary Computed Tomography Scanner Market by Scanners, Animal Group, ... Which are the positive and negative factors impacting the Veterinary Computed Tomography Scanner Market ...

https://www.futuremarketinsights.com/toc/rep-gb-6725

Results of search for su:{Tomography, X-ray computed.} Refine your search. *. Availability. * Limit to currently available ... Cerebral computed tomography : a text-atlas / Leon Weisberg, Charles Nice, Myron Katz. by Weisberg, Leon , Nice, Charles , Katz ...

https://kohahq.searo.who.int/cgi-bin/koha/opac-search.pl?q=su:%7BTomography%2C%20X-ray%20computed.%7D

title = "Gold nanoparticle cluster-plasmon-enhanced fluorescent silica core-shell nanoparticles for X-ray computed tomography- ... T1 - Gold nanoparticle cluster-plasmon-enhanced fluorescent silica core-shell nanoparticles for X-ray computed tomography- ... Gold nanoparticle cluster-plasmon-enhanced fluorescent silica core-shell nanoparticles for X-ray computed tomography- ... Gold nanoparticle cluster-plasmon-enhanced fluorescent silica core-shell nanoparticles for X-ray computed tomography- ...

https://kyushu-u.pure.elsevier.com/en/publications/gold-nanoparticle-cluster-plasmon-enhanced-fluorescent-silica-cor

... J Appl Physiol (1985) ... obtained from computed tomography scans of the heart and the coronary arteries. However, these models have high computational ... The model is trained on a large database of synthetically generated coronary anatomies, where the target values are computed ... Tomography, X-Ray Computed / methods ...

https://pubmed.ncbi.nlm.nih.gov/27079692/?dopt=Abstract

... ... Cracking predictions of lithium-ion battery electrodes by X-ray computed tomography and modelling , Journal of Power Sources ...

https://aura.abdn.ac.uk/handle/2164/19281

X-Ray Computed" by people in this website by year, and whether "Tomography, X-Ray Computed" was a major or minor topic of these ... "Tomography, X-Ray Computed" is a descriptor in the National Library of Medicines controlled vocabulary thesaurus, MeSH ( ... Tomography, X-Ray Computed*Tomography, X-Ray Computed. *X-Ray Computed Tomography ... Below are the most recent publications written about "Tomography, X-Ray Computed" by people in Profiles. ...

https://profiles.jefferson.edu/display/19238

Computed X-ray Tomography Study of Carbonate Precipitation in Large Portland Cement Pores. Chavez Panduro, Elvia Anabela; ... Here, we report a detailed X-ray microcomputed tomography (μ-CT) study on the carbonation of gas pores (macropores) of diameter ...

https://sintef.brage.unit.no/sintef-xmlui/handle/11250/2653592

2.5 X-ray micro computed tomography (microCT) X-ray micro computed tomography (microCT) can provide nondestructive three ... scanning and mapping micro X-ray fluorescence (XRF), synchrotron XRF, and high resolution X-ray microcomputed tomography ( ... 2.2 X-ray fluorescence (XRF) Two X-ray fluorescence (XRF) instruments were used to identify and map the distribution of ... Our objective to produce micro computed tomography reconstructions (models) of fiber-pore microstructure in cellulosic ...

https://www.nps.gov/articles/000/3d-analysis-and-visualization-of-tideline-changes-to-cellulosic-structures.htm

... the X-ray detector market will be restructured around computed tomography.. OUTLINE. * The X-ray detector market is expected to ... Computed tomography is progressively replacing classical radiography in medicine worldwide thanks to improvements in ... In its new Digital X-Ray Imaging 2022 report, the company, part of Yole Group, provides an understanding of the main trends in ... It provides data on the market shares of the different types of X-ray detectors. This study offers an understanding of the ...

https://www.edge-ai-vision.com/2022/11/x-ray-imaging-computed-tomography-is-the-name-of-the-game/

The X-Ray computed tomography (CT) scanner delivers high-quality, in-situ saturation profiles of single and multiphase core ... The X-Ray computed tomography (CT) scanner delivers high-quality, in-situ saturation profiles of single and multiphase core ... Single and dual energy x-ray scanning modes * X-ray CT scanner can be coupled with any of our flow recirculation systems ... The system comprises an X-Ray transparent core holder and a multi-slice, helical X-Ray CT scanner that rapidly acquires a ...

https://www.vinci-technologies.com/rocks-and-fluids/special-core-analysis/in-situ-saturation/x-ray-computed-tomography-ct-scanner/113451/

Application of X-ray micro-computed tomography on high-speed cavitating diesel fuel flows ... 2016). Application of X-ray micro-computed tomography on high-speed cavitating diesel fuel flows. Experiments in Fluids, 57(11 ... The flow inside a purpose built enlarged single-orifice nozzle replica is quantified using time-averaged X-ray micro-computed ... tomography (micro-CT) and high-speed shadowgraphy. Results have been obtained at Reynolds and cavitation numbers similar to ...

https://openaccess.city.ac.uk/id/eprint/16015/

With their high-power 225 kV and 320 kV x-ray sources, they can achieve transmission of sample up to approximately 30 mm steel ...

https://nxct.ac.uk/facilities/manchester/320-225-kv-bay/

Computed tomography; CXR: Chest x-ray; ESR: Erythrocyte sedimentation rate. ... CT chest (when chest x-ray is negative). 86.0. 71.9. 57.8. 92.0. ... Chest x-ray. 72.0-82.8. 92.0-96.4. 59.0-96. 84.1-95.3. ...

https://www.medscape.com/viewarticle/748741_2

Posts about X-ray computed tomography written by Janice Flahiff ... Positron emission tomography, X-ray computed tomography , Leave ... Positron emission tomography, University at Buffalo, X-ray computed tomography , Leave a comment ... Computed tomography usage, for example, more than tripled between 1996 and 2010. Over the same period, MRI (magnetic resonance ... Computed tomography examinations tripled (52/1000 enrollees in 1996 to 149/1000 in 2010, 7.8 percent annual growth) ...

https://jflahiff.wordpress.com/tag/x-ray-computed-tomography/

In high-risk patients, magnetic resonance imaging (MRI) and positron emission tomography-computed tomography (PET/CT) may further guide treatment decisions. (medscape.com)
Positron emission tomography scanning in the assessment of patients with lymphoma. (austin.org.au)

Introduction: Computed tomography (CT) scan is an accurate tool for the detection of injuries in a trauma setting and is able to find the injuries that were occult in chest X-ray (CXR). (who.int)
NSI has developed a range of 8 industrial digital X-ray and 3D CT systems that can scan devices using their efx-CT software. (irish-manufacturing.com)
A routine computed tomography (CT) scan through the midfoot is suggested to visualize any bony injury to the plantar bony structures. (medscape.com)
Screening with low-dose spiral computed tomography (CT) scan has been proven to reduce lung cancer deaths in people at high risk for lung cancer. (cancer.net)
This paper presents a new workflow of automated image processing to utilize poor-quality X-ray CT scan images. (cdc.gov)
Those with a positive skin test or abnormal chest X-ray were further evaluated by chest spiral computed tomography (CT) scan and triple gastric washing. (who.int)
You will receive a mouth X-ray and possibly a Computed Tomography (CT) scan. (oofs.net)
The radiation dose of a CT scanner is much higher than a traditional X-ray, but the information obtained from a CT scan is often much greater. (cafecolonial.com)

An X-ray Micro-Computed Tomography Facility with in-situ/in operando testing. (ukri.org)
X-ray micro-computed tomography analysis of accumulated corrosion prod" by Mohammed Albahri, Ahmed Barifcani et al. (edu.au)
Accumulated corrosion products from two different shipwrecks which had lain on the seabed (2.5 km depth) for 73 years were systematically analysed by three-dimensional imaging at high resolution using X-ray micro-computed tomography. (edu.au)
X-ray micro computed tomography (X-ray micro CT) was used as a non-destructive technique to monitor the effect of fungal damage on the internal structure of maize kernels infected with F. verticillioides. (sun.ac.za)
The flow inside a purpose built enlarged single-orifice nozzle replica is quantified using time-averaged X-ray micro-computed tomography (micro-CT) and high-speed shadowgraphy. (city.ac.uk)

Computed tomography is progressively replacing classical radiography in medicine worldwide thanks to improvements in performance linked to computational power during recent years. (edge-ai-vision.com)
The Company built its first Digital Radiography equipment in 1991 and first Computed Tomography system in 2002. (irish-manufacturing.com)
Printed circuit boards can be examined quickly and accurately using a computed radiography systems. (qualitymag.com)
Computed Radiography permits for great viewing latitude allowing you to capture in one exposure what may take multiple exposures and speeds using a film method. (qualitymag.com)
Advances in C-arms, such as mini-c-arms based on digital radiography and flat panel detectors, have aided in increasing global demand for x-ray equipment. (skyquestt.com)

In a multivariate analysis, after controlling for age and cigarette smoking, we found that the mean and median gray scale densities were independently associated with the presence of moderate-to-severe dyspnea, a higher International Labour Office chest X-ray category, a lower forced vital capacity, and a higher concentration of macrophages and eosinophils in the bronchoalveolar lavage fluid. (cdc.gov)
In fact, the National Lung Screening Trial found a 20% reduction in deaths from lung cancer among current or former heavy smokers who were screened with low-dose spiral CT, compared to those screened with a chest X-ray. (cancer.net)
In all, 52 classmates and close friends and 15 school staff were screened by tuberculin skin test and chest X-ray. (who.int)
Of the 52 girls, 17 (32%) had latent infection (either positive skin test or abnormal chest X-ray) and 3 (5.7%) had active TB (abnormal CT or positive culture additional to positive skin test or abnormal X-ray). (who.int)
Other procedures used for colon cancer stages include lymph node biopsy, chest x-ray, surgery, and carcinoembryonic antigen assay (CEA). (colorectal-cancer.net)
Of the 11, a third year student was found to have pulmonary TB disease by chest X-ray. (who.int)
Discussion: The authors thus recommend that teachers should undergo health examinations, including regular chest X-ray examinations. (who.int)
Tuberculosis contact investigation using interferon-gamma release assay with chest x-ray and computed tomography. (who.int)
LDCT (versus chest x-ray) is better able to detect early-stage cancer, when it is easier to treat, and could help reduce lung cancer death rates. (cdc.gov)
It is typically evident on chest x-ray only after 10 or more years of exposure (chronic silicosis), but may be seen after as little as five years (accelerated silicosis). (cdc.gov)

Objective: To conduct a critical analysis on the use of Cone-Beam Computed Tomography (CBCT) scanner at Bauru School of Dentistry (USP/Brazil) and the indications of this imaging technique. (bvsalud.org)
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. (winchesteroralsurgerycenter.com)

BACKGROUND:Dual-energy computed tomography (DECT) has been widely used to improve identification of substances from different spectral information. (iospress.com)
Metal artefact reduction by dual energy computed tomography using monoenergetic extrapolation. (phiro.science)

Assessing failure in epitaxially encapsulated micro-scale sensors using micro and nano x-ray computed tomography Mrs Communications . (academictree.org)

Vancouver, B.C., June 17, 2022 - Global spine X-ray and computed tomography market size reached USD 958.7 Million in 2021 and is expected to register a revenue CAGR of 5.87% during the forecast period, according to a latest analysis by Emergen Research. (emergenresearch.com)
Increasing cases of spinal disorders and spinal injuries requiring accurate diagnosis and quick treatment have increased adoption of spine X-rays and computed tomography devices and is expected to further drive market revenue growth between 2022 and 2030. (emergenresearch.com)
In its new Digital X-Ray Imaging 2022 report , the company, part of Yole Group, provides an understanding of the main trends in the different segments of digital X-ray imaging with a forecast of the market value and associated volumes. (edge-ai-vision.com)

To assess the validity of computer-assisted methods in analyzing the lung parenchyma imaged with high-resolution computed tomography (HRCT), we compared computer-derived estimates of lung density to other, more traditional, measures of parenchymal injury in 24 subjects with idiopathic pulmonary fibrosis (IPF) and 60 subjects with extensive occupational exposure to asbestos. (cdc.gov)
All patients we included were managed using a conventional strategy (D-dimer test, followed, if positive, by computed tomographic pulmonary angiogram (CTPA). (medecinedurgence.fr)

The equipment that radiographers use includes X-ray, ultrasound, computed tomography (CT) and magnetic resonance imaging (MRI). (unischolars.com)

X-ray tomography is an invaluable tool in biomedical imaging. (nature.com)
Energy-tunable transmission x-ray microscope for differential contrast imaging with near 60 nm resolution tomography. (nature.com)
Quantitative 3-D imaging of eukaryotic cells using soft X-ray tomography. (nature.com)
Phase objects in synchrotron radiation hard x-ray imaging. (nature.com)
Phase retrieval and differential phase-contrast imaging with low-brilliance X-ray sources. (nature.com)
Spine X-ray and computed tomography are widely used medical imaging techniques based on radiology, which enables healthcare providers to obtain clear images of internal organs of patients. (emergenresearch.com)
Rapid development in medical centers in rural and remote regions, as well as launch of CT scanners with higher imaging intelligence that enables healthcare providers to make faster medical decisions, are some other factors expected to increase usage of spine X-rays and computed tomography. (emergenresearch.com)
X-ray computed tomography (MicroCT) is a powerful tool for non-destructively imaging the interior 3-dimensional microstructure of objects. (ukri.org)
The Zeiss Xradia 620 Versa is a state-of-the-art X-ray Microscope with innovative optics, optimised for 3D non-destructive imaging of heterogeneous composite materials. (ukri.org)
The replicas were examined by computed nanotomography imaging to compare the resemblance of internal pore structures to the natural specimen. (geoscienceworld.org)
This process has been accessible to research scientists for decades now, but only recently has it become more cost-effective, thanks in large part to advances in digital x-ray imaging and computer processing. (nts.com)
The nanoparticles enabled tumor detection using fluorescence imaging and X-ray computed tomography. (elsevier.com)
The market dynamics in digital X-ray imaging have been affected by COVID-19 crisis and geopolitical tensions. (edge-ai-vision.com)
In this dynamic context, Yole Intelligence has developed a dedicated report to provide an overview of the digital X-ray imaging industry with a focus on detector components, including the different types of technologies. (edge-ai-vision.com)
In recent years, the Chinese X-ray imaging ecosystem has strengthened its position at the detector manufacturing and system levels. (edge-ai-vision.com)
Yole Intelligence's imaging team invites you to follow the X-ray industry and the evolution of the technology on www.yolegroup.com . (edge-ai-vision.com)
CT refers to a computerised x-ray imaging technology in which a narrow beam of x-rays is rapidly spun around a patient's body, producing signals processed by the machine's computer to produce cross-sectional images or "slices. (straitsresearch.com)
End markets like hospitals, clinics, diagnostic imaging centres, and ambulatory surgical centres use X-ray and CT machines. (straitsresearch.com)
Furthermore, the global spine X-ray and computed tomography (CT) market are expected to increase due to improvements in the medical imaging industry and the constant need to provide cost-effective, high-quality solutions in less time. (straitsresearch.com)
Powerful yet inexpensive X-ray imaging has been utilised extensively in medical diagnostics and industrial non-destructive testing. (straitsresearch.com)
As a result, high-performance X-ray detectors and their accompanying imaging applications have been developed unprecedentedly. (straitsresearch.com)
X-ray computed tomography (XCT) has been shown to be an effective imaging technique for a variety of materials. (ox.ac.uk)
ISO 15708-1 gives guidelines for, and defines terms for addressing the general principles of X-ray CT as they apply to industrial imaging. (iso.org)
Poly(iohexol) nanoparticles as contrast agents for in vivo X-ray computed tomography imaging. (bvsalud.org)
In 2021, the X-ray equipment segment held a commanding medical imaging market share. (skyquestt.com)
This usually involves scanning the chin body under the hips using a form of X-ray imaging that produces cross-sectional images. (cafecolonial.com)
The term "computed tomography," or computed tomography, refers to a computer-aided X-ray imaging technique in which a narrow X-ray beam is directed at a patient and quickly rotates around the body, creating signals that are processed by the machine`s computer to produce cross-sectional images - or "cuts" - of the body. (cafecolonial.com)
The diagnosis is based on a colonoscopy, video capsule endoscopy, and imaging tests such as barium x-rays, computed tomography, or magnetic resonance imaging. (merckmanuals.com)
The level of ionizing radiation from X-ray imaging is generally very low, but can contribute to an increased risk of cancer. (avdailynews.com)
The FDA is committed to protecting the health of children by providing guidance to manufacturers and users of imaging devices to help lower the exposure to radiation from X-ray exams. (avdailynews.com)
The FDA has regulatory oversight of X-ray imaging devices and the companies that make them. (avdailynews.com)
In a new guidance FDA recommends that medical X-ray imaging exams be optimized to use the lowest radiation dose needed. (avdailynews.com)
However, the optimization of image quality and radiation dose in X-ray imaging depends more on a patient's size than their age. (avdailynews.com)
Health care professionals are responsible for ensuring there is justification for all X-ray imaging exams performed on pediatric patients. (avdailynews.com)
The FDA encourages health care professionals and hospital administrators to refer to guidelines and instructions provided at the agency's Pediatric X-ray Imaging web portal. (avdailynews.com)
For more information visit the FDA's Pediatric X-ray Imaging website. (avdailynews.com)
Although CT, MRI, and nuclear imaging are useful in monitoring the progression of MBD and a patient's response to treatment, x-ray imaging remains the best method to characterize bone metastases. (medscape.com)
For more on x-ray imaging for MBD, read here . (medscape.com)

Hard-x-ray microscopy with Fresnel zone plates reaches 40 nm Rayleigh resolution. (nature.com)
High-resolution scanning x-ray diffraction microscopy. (nature.com)
This presentation introduces workflows that combine high-resolution X-ray microscopy and computed tomography to generate detailed three-dimensional visualization of the inside of lithium-ion batteries, without destroying them, to enable the study of their internal structure before and after charging/discharging cycles. (chargedevs.com)

The aim of the study is to test if intracerebral haemorrhage (ICH) patients who have contrast extravasation on computed tomography angiography, the 'spot sign', have lower rates of haematoma growth when treated with tranexamic acid within 4.5 hours of stroke onset, compared to placebo. (clinicaltrials.gov)

Spine X-ray and computed tomography are widely used for diagnosis of spinal tumors, fractures, or infections, due to their properties of generating images of internal organs that are generally inaccessible. (emergenresearch.com)
Asia Pacific is expected to register a rapid revenue growth rate in the spine X-ray and computed tomography market over the forecast period due to increasing adoption of radiology devices in the diagnosis of patients in the region. (emergenresearch.com)
This, along with the growing emphasis of government organizations on early disease diagnosis to control healthcare costs, influences the number of patients worldwide who undergo X-ray, magnetic resonance, and computed tomography scans. (skyquestt.com)

Recently, physics-based models have shown great promise in being able to noninvasively estimate FFR from patient-specific anatomical information, e.g., obtained from computed tomography scans of the heart and the coronary arteries. (nih.gov)
CT scans use an X-ray machine linked to a computer that takes a series of detailed pictures of your organs. (medlineplus.gov)

Here we describe an X-ray computed tomography technique that generates quantitative high-contrast three-dimensional electron density maps from phase contrast information without reverting to assumptions of a weak phase object or negligible absorption. (nature.com)

An X-ray is a diagnostic procedure employing radiation to obtain images of the skeleton and internal organs. (straitsresearch.com)

Spine X-ray and computed tomography operate on the principle of emitting X-radiations that pass through a patient's body and produce an image. (emergenresearch.com)
Technically, the patient's body thickness (the distance an X-ray travels through the body to create the image) is the most important consideration when "child-sizing" an image protocol. (avdailynews.com)

Computerized axial tomography is a service that the Nutema Hospital Radiology Department is happy to provide. (nutemahospital.com)
Computed tomography, formerly known as computer-aided axial computed tomography or computed tomography, uses computer-assisted combinations of many X-ray measurements taken from different angles to produce tomographic images ("virtual cross-section") ("slices") of specific areas of a scanned object so that the user can see into the object without cutting. (cafecolonial.com)

Because the objects under test are inanimate and the operators are well-protected from any radiation, industrial techniques typically include higher x-ray energies and longer acquisition times in order to maximize resolution and quality on more dense, metallic components. (nts.com)
Pediatric patients generally require less radiation than adults to obtain a quality image from an X-ray exam, so doctors must take extra care to "child size" the radiation dose. (avdailynews.com)
Among them, the photon absorption technique exposes the individual to radiation, the densitometry requires the individuals to be fully adapted to the liquid medium, the gamma ray spectrometry is impractical due to the high costs associated with the equipment, and the hydrometry requires an extended amount time for the determination of the body water contents. (bvsalud.org)

2021 marks the 50th anniversary of x-ray computed tomography (CT). (spie.org)

This standard provides definitions and a test procedure for the performance evaluation of X-ray CT systems used for 3D measurements. (asme.org)
2] Lüthi M, Bircher B A, Meli F, Küng A and Thalmann R 2020 X-ray flat-panel detector geometry correction to improve dimensional computed tomography measurements Meas. (admin.ch)

Spine X-ray and computed tomography operate through the principle of emitting X-rays from a source into an object or patient. (emergenresearch.com)
The global market for spine x-ray and computed tomography (CT) was valued at USD 0.95 billion , and it is anticipated to reach USD 1.65 billion by 2030 with a CAGR of 5.85% . (straitsresearch.com)
The global spine X-ray and computed tomography (CT) market have enormous growth potential because of the high growth opportunities in emerging nations and the emergence of local companies in Asia-Pacific, the Middle East and Africa. (straitsresearch.com)
Because the populations of emerging countries like China, India, Brazil, and Mexico have a high rate of spinal injuries and vertebral fractures, there is a tremendous opportunity for spine X-ray and CT equipment in these countries. (straitsresearch.com)

Tomography, X-Ray Computed" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (jefferson.edu)

Spine X-rays and computed tomography devices have also been widely adopted for oncology research and treatment due to their wide usage for examining bones, soft tissues, tumor growth, and observing metastases and body sections, which are some other factors driving revenue growth of the market. (emergenresearch.com)

The system comprises an X-Ray transparent core holder and a multi-slice, helical X-Ray CT scanner that rapidly acquires a tomographic image of the rock. (vinci-technologies.com)

Tomography using x-ray transmission and a computer algorithm to reconstruct the image. (jefferson.edu)
The metal artefact reduction algorithm improved computed tomography number accuracy. (phiro.science)

Computed tomography can reveal anatomical details of the human body`s internal organs that are not visible in conventional X-rays. (cafecolonial.com)

We expect this high-resolution tomography technique to provide invaluable information for both the life and materials sciences. (nature.com)
X-ray images of control and infected kernels were acquired post inoculation using high resolution X-ray micro CT over time. (sun.ac.za)
This study demonstrated that, although X-ray micro CT cannot be used as a rapid technique for detection of fungal infection especially during early stages of infection, it allows monitoring of structural changes in the kernel over time, and therefore offer a better understanding of the effect of fungal damage on the microstructure of maize kernel at high resolution. (sun.ac.za)
Recently, a high-resolution gamma ray computed tomography measurement system was presented, to analyse processes at hydrodynamic and multi phase flow facilities non-invasively. (isipt.org)

X-ray computed tomography (CT) images of rock specimens often contain artifacts which must be corrected before scientific analyses are performed. (cdc.gov)

The X-ray energy limits maximal transmission thicknesses to about 10 mm for steel, 65 mm for aluminium, 80 mm for glass and 150 mm for plastics. (admin.ch)
With their high-power 225 kV and 320 kV x-ray sources, they can achieve transmission of sample up to approximately 30 mm steel. (nxct.ac.uk)
Pour évaluer la transmission de la tuberculose à partir d'un cas de tuberculose pulmonaire à frottis négatif, les contacts d'une patiente iranienne de 15 ans atteinte de tuberculose à frottis négatif en 2010 ont fait l'objet d'un suivi. (who.int)

Be sure to take the SPIE course Principles and Advancements in X-ray Computed Tomography with author and instructor Jiang Hsieh. (spie.org)

He had a lung X-ray and a dark spot on the lungs was noticed. (wordpress.com)
In 2013, the US Preventive Services Task Force (USPSTF) issued a new recommendation for annual lung cancer screening with low-dose computed tomography (LDCT) in adults aged 55 to 80 with a history of smoking. (cdc.gov)

X-ray CT scanning has proven to be an excellent method to obtain internal, three-dimensional data in a non-destructive manner. (nts.com)

The absence of a moving x ray source in EBCT allows for very rapid scanning times, and recent evidence suggests that similar data can be obtained using less sophisticated spiral and conventional systems. (bmj.com)

In addition to performing inspection and analysis for its clients, Chesapeake Testing has been exploring techniques for optimizing x-ray and CT scanning to better analyze battery cell structure and damage. (nts.com)
The proposed X-ray CT scanner makes use of the latest scanning technology. (vinci-technologies.com)
Computed Tomography (CT) X-ray scanning is a testing and inspection method that can be used in the medical device industry to provide visual proof of a device's quality integrity. (irish-manufacturing.com)
From 2006, NSI widened its offering to include inspection services consulting for anyone needing X-ray and/or computed tomography scanning. (irish-manufacturing.com)
Contact Guy Tolley @ [email protected] to request for a demonstration or visit Guy at booth 412 at the Medtec Ireland Exhibition to discuss your industrial X-ray scanning needs. (irish-manufacturing.com)
[ 6 ] Multisection computed tomography (CT) scanning is generally accepted to be the first line of investigation in a patient with suspected pancreatic cancer. (medscape.com)
Computed Tomography or the CAT scanning process involves injecting a dye in the body, taking pictures of various parts of the body through x-ray machines and then developing them through a computer linked to the x-ray machines. (colorectal-cancer.net)

Phase-contrast X-ray computed tomography for observing biological soft tissues. (nature.com)

However, concerns regarding exposure of personnel during the use of spine X-rays and computed tomography is a key factor expected to hinder revenue growth of the market. (emergenresearch.com)

At our institute, 82 patients were involved in an observational study for assessing the utility of CBNAAT in the early confirmation of TB in individuals who had an X-ray chest that is indicative of PTB, but a negative sputum smear for AFB. (journaldmims.com)
X-ray exams provide important information to physicians about how to treat their patients. (avdailynews.com)
These exams, which include computed tomography (CT), fluoroscopy, dental, and conventional X-rays, should be performed on children and younger patients only when the health care provider believes they are necessary to answer a clinical question or to guide treatment. (avdailynews.com)

It provides data on the market shares of the different types of X-ray detectors. (edge-ai-vision.com)
The X-ray tube rotates rapidly around the patient`s body, and the X-rays hit many detectors after passing through the body. (cafecolonial.com)

The model is trained on a large database of synthetically generated coronary anatomies, where the target values are computed using the physics-based model. (nih.gov)

This study shows that the GPU-based open-source software toolkit TIGRE, which was initially intended for X-ray CT reconstruction, can be applied to the pCT image reconstruction problem using a straight line approach for the proton path. (physicamedica.com)

Micro-scale computed tomography at the proposed advanced level will give researchers a massively improved insight into materials structures, enabling scientists and engineers to better characterise a diverse range of materials, such as aircraft components, new battery materials, human bone and tissue, new biomedical materials implants and other complex materials. (ukri.org)
Metallic implants cause artefacts in computed tomography (CT) images and can introduce significant errors to structure visualisation and dosimetric calculation within the radiotherapy planning process. (phiro.science)
Implanted medical devices such as dental fillings and orthopaedic implants can cause artefacts in computed tomography (CT) images. (phiro.science)

In this study, the use of 3D X-ray computed tomography (XCT) is proposed as an innovative solution to non-destructively image the internal structure of drill core. (uct.ac.za)
This includes investigating methods to increase resolution and lower the noise caused by x-ray scatter, which can be detrimental to detailed image analysis, especially within larger cell designs. (nts.com)
A new workflow of X-ray CT image processing and data analysis of structural features in rock using open-source software. (cdc.gov)
The results of the structural feature analyses and computational time were compared between the open-source (ImageJ) and commercial image analysis software (Bruker Computed Tomography Analyzer). (cdc.gov)
The increasing use of interventional x-ray systems such as C-arms and others for image-guided surgeries is driving the growth of this segment. (skyquestt.com)

You can use data collection services and full structure analysis services for single crystal X-ray diffraction through NCS, based at the University of Southampton and Diamond Light Source. (ukri.org)

You can use two photoelectron spectrometers providing XPS, UPS, LEIS and ion etching using single or cluster argon ions at HarwellXPS, the EPSRC national facility for X-ray photoelectron spectroscopy. (ukri.org)

It is recommended that normal water loss or decreased colonic irrigation, and also 55% normal water industry capability, be looked at pertaining to sprinkler system organizing before the maize tasseling stage inside fairly neutral loam, field dirt for sub-humid locations below drinking water constrained circumstances.The particular 3D-segmentation involving lymph nodes in computed tomography photos is necessary pertaining to staging and also disease development overseeing. (jnk-receptor.com)

Se calcularon las data collection handling and frecuencias encontradas y los datos de los hallazgos más frecuentes fueron resumidas en metaanálisis usando el método de analysis, writing, revision. (bvsalud.org)

Results of search for 'su:{Tomography, X-ray computed. (who.int)

Anatomy40

Organisms4

Diseases35

Chemicals and Drugs30

Analytical, Diagnostic and Therapeutic Techniques and Equipment99

Psychiatry and Psychology2

Phenomena and Processes32

Disciplines and Occupations5

Technology, Industry, Agriculture4

Information Science11

Named Groups2

Health Care41

Geographicals3

Computerised tomography of acute traumatic intracranial haematoma: reliability of neurosurgeons' interpretations. (1/28924)

Evaluating cost-effectiveness of diagnostic equipment: the brain scanner case. (2/28924)

Comparative efficacy of positron emission tomography with FDG and computed tomographic scanning in preoperative staging of non-small cell lung cancer. (3/28924)

Parametric mapping of cerebral blood flow deficits in Alzheimer's disease: a SPECT study using HMPAO and image standardization technique. (4/28924)

Detection of liver metastases from pancreatic cancer using FDG PET. (5/28924)

Using vascular structure for CT-SPECT registration in the pelvis. (6/28924)

Obturator internus muscle abscess in children: report of seven cases and review. (7/28924)

Lymphadenitis due to nontuberculous mycobacteria in children: presentation and response to therapy. (8/28924)

Tomography, X-Ray Computed

Tomography

Positron-Emission Tomography

Tomography, Optical Coherence

Tomography, Emission-Computed

Tomography, Spiral Computed

Tomography, Optical

Gamma Rays

Radiography

Multidetector Computed Tomography

Tomography, Emission-Computed, Single-Photon

Cone-Beam Computed Tomography

Electron Microscope Tomography

Tomography, X-Ray

Electron Probe Microanalysis

Fluorodeoxyglucose F18

Pneumoconiosis

Elasmobranchii

Tomography Scanners, X-Ray Computed

Skates (Fish)

Imaging, Three-Dimensional

Radiation Dosage

Sensitivity and Specificity

Fast Neutrons

Radiology Department, Hospital

Reproducibility of Results

Magnetic Resonance Imaging

Wrist Joint

Image Processing, Computer-Assisted

Prospective Studies

Retrospective Studies

Radiation Effects

Predictive Value of Tests

Ultraviolet Rays

Teleradiology

Spectrometry, X-Ray Emission

Dose-Response Relationship, Radiation

Metacarpophalangeal Joint

Aluminum Silicates

Animal Fins

Metacarpus

Phantoms, Imaging

Observer Variation

Radiographic Image Interpretation, Computer-Assisted

X-Ray Microtomography

Time Factors

X Chromosome

Cathode Ray Tube

Fluorine Radioisotopes

Multimodal Imaging

Craniocerebral Trauma

Pleura

Asbestosis

Lung

Diagnostic Errors

Emergency Service, Hospital

Radiometry

Cadmium Radioisotopes

Foreign Bodies

Dental Technicians

Follow-Up Studies

Diagnostic Imaging

Radiation Genetics

Cosmic Radiation

Calcaneus

Occupational Diseases

Quartz

Bone Diseases, Metabolic

Asbestos

Severity of Illness Index

Four-Dimensional Computed Tomography

Radiographic Image Enhancement

Brain

Contrast Media

Arthritis, Rheumatoid

Occupational Exposure

Treatment Outcome

Radiography, Abdominal

Radiation Tolerance

Calcinosis