Tomography using x-ray transmission and a computer algorithm to reconstruct the 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.
The sensory ganglion of the COCHLEAR NERVE. The cells of the spiral ganglion send fibers peripherally to the cochlear hair cells and centrally to the COCHLEAR NUCLEI of the BRAIN STEM.
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.
A spiral thickening of the fibrous lining of the cochlear wall. Spiral ligament secures the membranous COCHLEAR DUCT to the bony spiral canal of the COCHLEA. Its spiral ligament fibrocytes function in conjunction with the STRIA VASCULARIS to mediate cochlear ion homeostasis.
Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
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.
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.
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 part of the inner ear (LABYRINTH) that is concerned with hearing. It forms the anterior part of the labyrinth, as a snail-like structure that is situated almost horizontally anterior to the VESTIBULAR LABYRINTH.
The compound is given by intravenous injection to do POSITRON-EMISSION TOMOGRAPHY for the assessment of cerebral and myocardial glucose metabolism in various physiological or pathological states including stroke and myocardial ischemia. It is also employed for the detection of malignant tumors including those of the brain, liver, and thyroid gland. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1162)
The 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 bony plate which extends outwards from the modiolus into the spiral canal of the cochlea, forming part of the structure that divides the upper SCALA VESTIBULI and the lower SCALA TYMPANI.
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)
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
The 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.
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)
Modality of computed tomography in which the patient is irradiated in a spiral path around the body with a cone or pyramid-shaped beam.
Computer systems or networks designed to provide radiographic interpretive information.
A layer of stratified EPITHELIUM forming the endolymphatic border of the cochlear duct at the lateral wall of the cochlea. Stria vascularis contains primarily three cell types (marginal, intermediate, and basal), and capillaries. The marginal cells directly facing the ENDOLYMPH are important in producing ion gradients and endochoclear potential.
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.
X-RAY COMPUTERIZED TOMOGRAPHY with resolution in the micrometer range.
The use of combination of imaging techniques or platforms (e.g., MRI SCAN and PET SCAN) encompassing aspects of anatomical, functional, or molecular imaging methods.
Unstable isotopes of fluorine that decay or disintegrate emitting radiation. F atoms with atomic weights 17, 18, and 20-22 are radioactive fluorine isotopes.
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.
Substances used to allow enhanced visualization of tissues.
The spiral EPITHELIUM containing sensory AUDITORY HAIR CELLS and supporting cells in the cochlea. Organ of Corti, situated on the BASILAR MEMBRANE and overlaid by a gelatinous TECTORIAL MEMBRANE, converts sound-induced mechanical waves to neural impulses to the brain.
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.
Pathologic deposition of calcium salts in tissues.
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.
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.
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.
X-ray visualization of the chest and organs of the thoracic cavity. It is not restricted to visualization of the lungs.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
Methods of creating machines and devices.
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.
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.
A spiral tube that is firmly suspended in the bony shell-shaped part of the cochlea. This ENDOLYMPH-filled cochlear duct begins at the vestibule and makes 2.5 turns around a core of spongy bone (the modiolus) thus dividing the PERILYMPH-filled spiral canal into two channels, the SCALA VESTIBULI and the SCALA TYMPANI.
Either of a pair of compound bones forming the lateral (left and right) surfaces and base of the skull which contains the organs of hearing. It is a large bone formed by the fusion of parts: the squamous (the flattened anterior-superior part), the tympanic (the curved anterior-inferior part), the mastoid (the irregular posterior portion), and the petrous (the part at the base of the skull).
The cochlear part of the 8th cranial nerve (VESTIBULOCOCHLEAR NERVE). The cochlear nerve fibers originate from neurons of the SPIRAL GANGLION and project peripherally to cochlear hair cells and centrally to the cochlear nuclei (COCHLEAR NUCLEUS) of the BRAIN STEM. They mediate the sense of hearing.
Three-dimensional computed tomographic imaging with the added dimension of time, to follow motion during imaging.
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
A general term for the complete loss of the ability to hear from both ears.
Electrical waves in the CEREBRAL CORTEX generated by BRAIN STEM structures in response to auditory click stimuli. These are found to be abnormal in many patients with CEREBELLOPONTINE ANGLE lesions, MULTIPLE SCLEROSIS, or other DEMYELINATING DISEASES.
Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series.
A branch arising from the internal iliac artery in females, that supplies blood to the uterus.
Elements of limited time intervals, contributing to particular results or situations.
The essential part of the hearing organ consists of two labyrinthine compartments: the bony labyrinthine and the membranous labyrinth. The bony labyrinth is a complex of three interconnecting cavities or spaces (COCHLEA; VESTIBULAR LABYRINTH; and SEMICIRCULAR CANALS) in the TEMPORAL BONE. Within the bony labyrinth lies the membranous labyrinth which is a complex of sacs and tubules (COCHLEAR DUCT; SACCULE AND UTRICLE; and SEMICIRCULAR DUCTS) forming a continuous space enclosed by EPITHELIUM and connective tissue. These spaces are filled with LABYRINTHINE FLUIDS of various compositions.
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).
Radiographic visualization of the body between the thorax and the pelvis, i.e., within the peritoneal cavity.
Radiography of blood vessels after injection of a contrast medium.
Cells lining the outside of the BLASTOCYST. After binding to the ENDOMETRIUM, trophoblasts develop into two distinct layers, an inner layer of mononuclear cytotrophoblasts and an outer layer of continuous multinuclear cytoplasm, the syncytiotrophoblasts, which form the early fetal-maternal interface (PLACENTA).
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.
A method of separation of two or more substances by repeated distribution between two immiscible liquid phases that move past each other in opposite directions. It is a form of liquid-liquid chromatography. (Stedman, 25th ed)
Timing the acquisition of imaging data to specific points in the cardiac cycle to minimize image blurring and other motion artifacts.
Sensory cells in the organ of Corti, characterized by their apical stereocilia (hair-like projections). The inner and outer hair cells, as defined by their proximity to the core of spongy bone (the modiolus), change morphologically along the COCHLEA. Towards the cochlear apex, the length of hair cell bodies and their apical STEREOCILIA increase, allowing differential responses to various frequencies of sound.
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).
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)
Theoretical representations that simulate the behavior or activity of the cardiovascular system, processes, or phenomena; includes the use of mathematical equations, computers and other electronic equipment.
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.
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.
Methods and procedures for the diagnosis of diseases of the eye or of vision disorders.
Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes.
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.
Gradual bilateral hearing loss associated with aging that is due to progressive degeneration of cochlear structures and central auditory pathways. Hearing loss usually begins with the high frequencies then progresses to sounds of middle and low frequencies.
An effective non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiographic procedures. Its low systemic toxicity is the combined result of low chemotoxicity and low osmolality.
Cells forming a framework supporting the sensory AUDITORY HAIR CELLS in the organ of Corti. Lateral to the medial inner hair cells, there are inner pillar cells, outer pillar cells, Deiters cells, Hensens cells, Claudius cells, Boettchers cells, and others.
Computer-based representation of physical systems and phenomena such as chemical processes.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
Blocking of the PULMONARY ARTERY or one of its branches by an EMBOLUS.
The circulation of blood through the BLOOD VESSELS of the BRAIN.
Radiography of the bronchial tree after injection of a contrast medium.
Tumors or cancer of the LUNG.
Auditory sensory cells of organ of Corti, usually placed in one row medially to the core of spongy bone (the modiolus). Inner hair cells are in fewer numbers than the OUTER AUDITORY HAIR CELLS, and their STEREOCILIA are approximately twice as thick as those of the outer hair cells.
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)
The vessels carrying blood away from the heart.
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.
Fenestra of the cochlea, an opening in the basal wall between the MIDDLE EAR and the INNER EAR, leading to the cochlea. It is closed by a secondary tympanic membrane.
The hollow, muscular organ that maintains the circulation of the blood.
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.
Narrowing or constriction of a coronary artery.
Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.
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)
Pathological processes of the snail-like structure (COCHLEA) of the inner ear (LABYRINTH) which can involve its nervous tissue, blood vessels, or fluid (ENDOLYMPH).
The veins and arteries of the HEART.
A neurotrophic factor involved in regulating the survival of visceral and proprioceptive sensory neurons. It is closely homologous to nerve growth factor beta and BRAIN-DERIVED NEUROTROPHIC FACTOR.
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.
Radiography using air, oxygen, or some other gas as a contrast medium.
LIGHT, it's processes and properties, and the characteristics of materials interacting with it.
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
Non-invasive method of vascular imaging and determination of internal anatomy without injection of contrast media or radiation exposure. The technique is used especially in CEREBRAL ANGIOGRAPHY as well as for studies of other vascular structures.
The ability or act of sensing and transducing ACOUSTIC STIMULATION to the CENTRAL NERVOUS SYSTEM. It is also called audition.
A general term for the complete or partial loss of the ability to hear from one or both ears.
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.
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.
Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents.
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.
The circulation of BLOOD, of both the mother and the FETUS, through the PLACENTA.
Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Hearing loss resulting from damage to the COCHLEA and the sensorineural elements which lie internally beyond the oval and round windows. These elements include the AUDITORY NERVE and its connections in the BRAINSTEM.
Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.
A genus of gram-negative, curved and spiral-shaped bacteria found in stagnant, freshwater environments. These organisms are motile by bipolar tufts of flagella having a long wavelength and about one helical turn. Some species of Spirillum cause a form of RAT-BITE FEVER.
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).
Methods which attempt to express in replicable terms the extent of the neoplasm in the patient.
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 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.
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
Three-dimensional representation to show anatomic structures. Models may be used in place of intact animals or organisms for teaching, practice, and study.
Electronic hearing devices typically used for patients with normal outer and middle ear function, but defective inner ear function. In the COCHLEA, the hair cells (HAIR CELLS, VESTIBULAR) may be absent or damaged but there are residual nerve fibers. The device electrically stimulates the COCHLEAR NERVE to create sound sensation.
Histochemical localization of immunoreactive substances using labeled antibodies as reagents.
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.
The hormone-responsive glandular layer of ENDOMETRIUM that sloughs off at each menstrual flow (decidua menstrualis) or at the termination of pregnancy. During pregnancy, the thickest part of the decidua forms the maternal portion of the PLACENTA, thus named decidua placentalis. The thin portion of the decidua covering the rest of the embryo is the decidua capsularis.
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.
A common name used for the genus Cavia. The most common species is Cavia porcellus which is the domesticated guinea pig used for pets and biomedical research.
A species of baboon in the family CERCOPITHECIDAE with a somewhat different social structure than PAPIO HAMADRYAS. They inhabit several areas in Africa south of the Sahara.
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.
Surgical insertion of an electronic hearing device (COCHLEAR IMPLANTS) with electrodes to the COCHLEAR NERVE in the inner ear to create sound sensation in patients with residual nerve fibers.
Removal and pathologic examination of specimens in the form of small pieces of tissue from the living body.
The hollow thick-walled muscular organ in the female PELVIS. It consists of the fundus (the body) which is the site of EMBRYO IMPLANTATION and FETAL DEVELOPMENT. Beyond the isthmus at the perineal end of fundus, is CERVIX UTERI (the neck) opening into VAGINA. Beyond the isthmi at the upper abdominal end of fundus, are the FALLOPIAN TUBES.
An abnormal balloon- or sac-like dilatation in the wall of the ABDOMINAL AORTA which gives rise to the visceral, the parietal, and the terminal (iliac) branches below the aortic hiatus at the diaphragm.
Tumors or cancer of the LIVER.
The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.
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)
A genus of gram-negative, spiral-shaped bacteria that has been isolated from the intestinal tract of mammals, including humans. It has been associated with PEPTIC ULCER.
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 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 electric response of the cochlear hair cells to acoustic stimulation.
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.
A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.
Naturally occurring or experimentally induced animal diseases with pathological processes sufficiently similar to those of human diseases. They are used as study models for human diseases.
The audibility limit of discriminating sound intensity and pitch.
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).
A highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products. It includes a fetal portion (CHORIONIC VILLI) derived from TROPHOBLASTS and a maternal portion (DECIDUA) derived from the uterine ENDOMETRIUM. The placenta produces an array of steroid, protein and peptide hormones (PLACENTAL HORMONES).
A complication of PREGNANCY, characterized by a complex of symptoms including maternal HYPERTENSION and PROTEINURIA with or without pathological EDEMA. Symptoms may range between mild and severe. Pre-eclampsia usually occurs after the 20th week of gestation, but may develop before this time in the presence of trophoblastic disease.
Arthropods of the class ARACHNIDA, order Araneae. Except for mites and ticks, spiders constitute the largest order of arachnids, with approximately 37,000 species having been described. The majority of spiders are harmless, although some species can be regarded as moderately harmful since their bites can lead to quite severe local symptoms. (From Barnes, Invertebrate Zoology, 5th ed, p508; Smith, Insects and Other Arthropods of Medical Importance, 1973, pp424-430)
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.
Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.
Disease having a short and relatively severe course.
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.
Examination of the interior of the eye with an ophthalmoscope.
Pathological processes involving any part of the AORTA.
The development of the PLACENTA, a highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products between mother and FETUS. The process begins at FERTILIZATION, through the development of CYTOTROPHOBLASTS and SYNCYTIOTROPHOBLASTS, the formation of CHORIONIC VILLI, to the progressive increase in BLOOD VESSELS to support the growing fetus.
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.
Surgical insertion of BLOOD VESSEL PROSTHESES to repair injured or diseased blood vessels.
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.
Devices that provide support for tubular structures that are being anastomosed or for body cavities during skin grafting.
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.
The circulation of blood through the CORONARY VESSELS of the HEART.
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.
A collection of blood outside the BLOOD VESSELS. Hematoma can be localized in an organ, space, or tissue.
The anteriorly located rigid section of the PALATE.
Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.
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.
Accumulation of a drug or chemical substance in various organs (including those not relevant to its pharmacologic or therapeutic action). This distribution depends on the blood flow or perfusion rate of the organ, the ability of the drug to penetrate organ membranes, tissue specificity, protein binding. The distribution is usually expressed as tissue to plasma ratios.
Congenital structural deformities, malformations, or other abnormalities of the maxilla and face or facial bones.
Absence of air in the entire or part of a lung, such as an incompletely inflated neonate lung or a collapsed adult lung. Pulmonary atelectasis can be caused by airway obstruction, lung compression, fibrotic contraction, or other factors.
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)
Radiography of the vascular system of the brain after injection of a contrast medium.
A continuous protein fiber consisting primarily of FIBROINS. It is synthesized by a variety of INSECTS and ARACHNIDS.
A computer based method of simulating or analyzing the behavior of structures or components.
The plan and delineation of prostheses in general or a specific prosthesis.
The SKELETON of the HEAD including the FACIAL BONES and the bones enclosing the BRAIN.
Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons as healthy when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)
The flow of BLOOD through or around an organ or region of the body.
A member of the nerve growth factor family of trophic factors. In the brain BDNF has a trophic action on retinal, cholinergic, and dopaminergic neurons, and in the peripheral nervous system it acts on both motor and sensory neurons. (From Kendrew, The Encyclopedia of Molecular Biology, 1994)
BIRDS that hunt and kill other animals, especially higher vertebrates, for food. They include the FALCONIFORMES order, or diurnal birds of prey, comprised of EAGLES, falcons, HAWKS, and others, as well as the STRIGIFORMES order, or nocturnal birds of prey, which includes OWLS.
A method of delineating blood vessels by subtracting a tissue background image from an image of tissue plus intravascular contrast material that attenuates the X-ray photons. The background image is determined from a digitized image taken a few moments before injection of the contrast material. The resulting angiogram is a high-contrast image of the vessel. This subtraction technique allows extraction of a high-intensity signal from the superimposed background information. The image is thus the result of the differential absorption of X-rays by different tissues.
The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.
Behavior of LIGHT and its interactions with itself and materials.
A subfamily of the Muridae consisting of several genera including Gerbillus, Rhombomys, Tatera, Meriones, and Psammomys.
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.
Nodular tumor-like lesions or mucoid flesh, arising from tendon sheaths, LIGAMENTS, or JOINT CAPSULE, especially of the hands, wrists, or feet. They are not true cysts as they lack epithelial wall. They are distinguished from SYNOVIAL CYSTS by the lack of communication with a joint cavity or the SYNOVIAL MEMBRANE.
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)
Small-scale tests of methods and procedures to be used on a larger scale if the pilot study demonstrates that these methods and procedures can work.
Unstable isotopes of iodine that decay or disintegrate emitting radiation. I atoms with atomic weights 117-139, except I 127, are radioactive iodine isotopes.
Injuries caused by impact with a blunt object where there is no penetration of the skin.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
Sensory cells of organ of Corti. In mammals, they are usually arranged in three or four rows, and away from the core of spongy bone (the modiolus), lateral to the INNER AUDITORY HAIR CELLS and other supporting structures. Their cell bodies and STEREOCILIA increase in length from the cochlear base toward the apex and laterally across the rows, allowing differential responses to various frequencies of sound.
Pathologic conditions affecting the BRAIN, which is composed of the intracranial components of the CENTRAL NERVOUS SYSTEM. This includes (but is not limited to) the CEREBRAL CORTEX; intracranial white matter; BASAL GANGLIA; THALAMUS; HYPOTHALAMUS; BRAIN STEM; and CEREBELLUM.
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)
An impulse-conducting system composed of modified cardiac muscle, having the power of spontaneous rhythmicity and conduction more highly developed than the rest of the heart.
A value equal to the total volume flow divided by the cross-sectional area of the vascular bed.
Pain emanating from below the RIBS and above the ILIUM.
Methods developed to aid in the interpretation of ultrasound, radiographic images, etc., for diagnosis of disease.
An area approximately 1.5 millimeters in diameter within the macula lutea where the retina thins out greatly because of the oblique shifting of all layers except the pigment epithelium layer. It includes the sloping walls of the fovea (clivus) and contains a few rods in its periphery. In its center (foveola) are the cones most adapted to yield high visual acuity, each cone being connected to only one ganglion cell. (Cline et al., Dictionary of Visual Science, 4th ed)
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
A specialized field of physics and engineering involved in studying the behavior and properties of light and the technology of analyzing, generating, transmitting, and manipulating ELECTROMAGNETIC RADIATION in the visible, infrared, and ultraviolet range.
The use of molecularly targeted imaging probes to localize and/or monitor biochemical and cellular processes via various imaging modalities that include RADIONUCLIDE IMAGING; ULTRASONOGRAPHY; MAGNETIC RESONANCE IMAGING; FLUORESCENCE IMAGING; and MICROSCOPY.

CT virtual endoscopy of the auditory ossicular chain: clinical applications. (1/707)

OBJECTIVE: To evaluate the clinical applications and limitations of CT virtual endoscopy (CTVE) in the auditory ossicular chain. METHODS: CTVE of the auditory ossicular chain was performed with 1.0 mm collimation at pitch 1.0, bone algorithm, 9.6 cm field of view, and 0.1-0.2 mm reconstruction interval in 40 patients with middle ear diseases. 30 cases were confirmed by surgery. Results were compared with the findings of axial high resolution CT (HRCT) and multiplanar reformation (MPR) images and surgery. RESULTS: The accuracy of CTVE images in detecting ossicular destruction was 92.6%, significantly higher than that of axial HRCT (83.9%) and multiplanar reformation (76.5%) images. CTVE could also clearly reveal the postoperative condition and congenital dysplasia of the auditory ossicular chain. CONCLUSIONS: CTVE can clearly demonstrate a three-dimensional image of the auditory ossicular chain and is useful in evaluating diseases of the ear, especially the auditory ossicles. CTVE could not clearly demonstrate abnormal soft tissue within the tympanic cavity, abnormal changes of the tympanic membrane and tympanic walls, and could be easily influenced by artificial factors.  (+info)

Evaluation of cross-sectional luminal morphology in carotid atherosclerotic disease by use of spiral CT angiography. (2/707)

BACKGROUND AND PURPOSE: This study sought to determine the frequency of noncircular lumens in patients with significant carotid atherosclerotic disease and to evaluate the effect of noncircular lumens on stenosis measurement derived from angiographic projections. METHODS: One hundred consecutive patients presenting with an internal carotid artery stenosis of at least 50% were imaged with spiral CT angiography. The transverse morphology of the diseased lumen was assessed on axial images, and the frequency of noncircular lumens was determined. In these cases, maximum intensity projection angiograms were reconstructed in standardized angiographic planes and in a plane selected according to the luminal obliquity, which was chosen to optimize the angiographic representation of the maximal stenosis. North American Symptomatic Carotid Endarterectomy Trial (NASCET) measurements were calculated from the maximum intensity projection images, and differences between values obtained from standard and optimized projections were recorded. RESULTS: Noncircular lumens were observed in 18 of 100 patients and consisted of elliptical and linear transverse profiles. The transverse orientation of the lumen in these cases ranged from +90 degrees to -87 degrees relative to the anteroposterior plane. An increase in the calculated NASCET stenosis was demonstrated when measurements were obtained from angiographic reconstructions obtained in the exact plane of the luminal obliquity compared with standard angiographic projections. As a result, the stenosis severity was upgraded from moderate to severe in 2 patients. CONCLUSIONS: Noncircular transverse luminal profiles are not uncommon and may introduce error into NASCET calculations obtained from standard angiographic projections.  (+info)

Spiral computed tomography of pulmonary embolism. (3/707)

Within the last several years, spiral computed tomography angiography (SCTA) of the pulmonary arteries has emerged as a noninvasive angiographic modality for the evaluation of patients with suspected pulmonary embolism (PE). SCTA is based on continuous computed tomography (CT) data acquisition during patient transport through the rotating X-ray tube and detector system, where scanning is performed in the time period in which the injected contrast material passes through the pulmonary arteries. Single detector spiral CT has a sensitivity of approximately 85-90% and a specificity between 88-95%. Sensitivity and specificity are very likely to increase with the use of multidetector spiral CT scanners that allow scanning of large lung volumes with a scan collimation as narrow as 1 mm. Currently, SCTA is most commonly used as a primary imaging method in patients with suspected PE, and as a second-line method in cases with inconclusive ventilation/ perfusion scintigraphy results. SCTA has proven to be cost-effective, especially in combination with ultrasound of the lower extremities. Limitations of the method include a decreased sensitivity for the detection of small isolated clots in the peripheral pulmonary arterial bed, and a potentially reduced image quality in patients with coexistent cardiopulmonary disorders. Despite these limitations, several studies have now documented that, in patients with suspected pulmonary embolism, it is safe to withhold anticoagulation therapy if a spiral computed tomography exam of the pulmonary arteries is negative and no lower extremity venous thrombosis is present. In the future, multislice computed tomography scanning of the pulmonary arteries with multiplanar reformation and one-stop shopping, i.e. scanning of the pulmonary arteries and the lower extremity veins in a single session, will further enhance the role of computed tomography angiography in the examination of patients with suspected pulmonary embolism.  (+info)

Imaging techniques in treatment algorithms of pulmonary embolism. (4/707)

Pulmonary embolism (PE) is more often diagnosed post mortem by pathologists than in vivo by clinicians. The identification of practical diagnostic algorithms could reduce the rate of diagnoses first made at autopsy. The literature was reviewed for evidence-based approaches to PE diagnosis. Since the PE mortality rate greatly exceeds that of deep vein thrombosis (DVT), more emphasis was given to reports specifically dealing with PE diagnosis by objective pulmonary vascular imaging techniques than to those aimed at DVT detection. Several studies have shown that standardized clinical estimates can be effectively used to give a pretest probability to calculate, after appropriate objective testing, the post-test probability of PE. A prospective trial has shown that perfusion scanning, rather than ventilation/perfusion scanning, should be the imaging technique of first choice for the management of patients suspected of having PE. The clinical usefulness of spiral computed tomography has not as yet been firmly established. However, ongoing technological developments would probably render the technique accurate enough to replace conventional angiography. The authors propose a noninvasive diagnostic algorithm with high predictive accuracy (positive predictive value 96%; negative predictive value 98%) starting with a standardized assessment of clinical likelihood, followed by a perfusion scan and, eventually, spiral computed tomography in only a minority of patients (< 20%) with discordant clinical and scintigraphic findings.  (+info)

Computed tomography and magnetic resonance imaging: past, present and future. (5/707)

The aims of this paper are to summarize the current recommendations for the use of computed tomography (CT) and magnetic resonance imaging (MRI) in the chest and to suggest some possible future developments. The main developments of CT in the chest have been the introduction of high-resolution CT (HRCT), spiral CT and, more recently, multidetector spiral CT. HRCT is defined as thin-section CT (1- to 2-mm collimation scans), optimized by using a high-spatial resolution (edge-enhancing) algorithm. Several studies have shown that HRCT closely reflects macroscopic (gross) pathological findings. HRCT currently has the best sensitivity and specificity of any imaging method used for the assessment of focal and diffuse lung diseases. The advent of spiral CT and, more recently, multidetector CT scanners, has allowed for major improvements in the imaging of airways, pulmonary and systemic vessels, and lung nodules. Spiral CT facilitates multiplanar and three-dimensional display of structures and visualization of pulmonary and systemic vessels, with a level of detail that is comparable to that of conventional angiography. With the use of graphics-based software programs, spiral CT enables depiction of the luminal surface of the airways with images that resemble those of bronchoscopy (virtual bronchoscopy) or bronchography (virtual bronchography). Several studies have shown a high sensitivity and specificity for spiral CT in the diagnosis of acute pulmonary embolism. Therefore, spiral CT is rapidly becoming the imaging modality of choice in the diagnosis of pulmonary embolism. Like the radiograph, signal intensity on computed tomography is mainly due to a single parameter: electron density. The signal intensity of the magnetic resonance image depends on four parameters: nuclear density, two relaxation times called T1 and T2, and motion of the nuclei within the imaged lung volume. Abnormal soft tissue can be identified more easily through measurement of these four parameters than through use of computed tomography. Furthermore, because the spatial orientation of the image is determined by manipulation of magnetic fields, scans can be performed in any plane. The main indications for magnetic resonance in the chest have been in the evaluation of the heart, major vessels, mediastinum, and hilar structures because of the natural contrast provided by flowing blood. Of particular interest for the respirologist has been the recent development of magnetic resonance angiography. This technique consists of three-dimensional single breath-hold images obtained using gadolinium-based contrast agents. This is a promising technique for the diagnosis of acute and chronic pulmonary embolism.  (+info)

New imaging techniques in the treatment guidelines for lung cancer. (6/707)

Computed tomography (CT) remains the main imaging technique for the preoperative staging and post-therapeutic evaluation of bronchogenic carcinoma. Spiral CT has already overcome some of the problems encountered with central or more extensive tumours. Multislice CT offers further improvement and allows for scanning of the whole chest within a single breath-hold using a thin-section high-resolution technique. Problem-adapted sections in arbitrary directions become available and provide an excellent spatial resolution. One can expect improved accuracy for the evaluation of transfissural tumour growth, chest wall involvement, mediastinal infiltration and lymph node staging. Despite recent advances in magnetic resonance (MR) techniques for imaging the chest, the role of MR for staging of bronchogenic carcinoma remains limited. It offers advantages such as the assessment of chest-wall involvement or mediastinal involvement in patients in whom CT remains equivocal. Lymph-node-specific MR contrast agents offer new diagnostic potential for the assessment of metastatic disease. New techniques for the display of three-dimensional data sets include volume rendering and virtual bronchoscopy. These techniques represent new tools for the evaluation and demonstration of pathology within the central tracheobronchial tree. Their most important application is the guidance of bronchoscopic biopsies. The assessment of an indeterminate pulmonary nodule is frequently based on positron emission tomography imaging. As an alternative, nodule vascularization (contrast enhancement patterns on CT or magnetic resonance imaging (MRI)), calcifications (absorption characteristics at various X-ray energies on CT or dual energy radiography), and morphological features (high resolution imaging at CT) can be used as the basis for nodule differentiation. The dynamics of contrast enhancement in CT or MRI can also be used for the assessment of tumour viability after chemotherapy. Lung cancer screening programmes are still controversial. Low-dose computed tomography scanning and computed assisted detection algorithms based on chest radiographs or computed tomography scans form the technical basis for such projects.  (+info)

Pulmonary emboli caused by iliac compression syndrome without leg symptoms. (7/707)

Iliac compression syndrome is a clinical condition that occurs as a result of compression of the left common iliac vein by the overlying right common iliac artery. This syndrome most often affects young to middle-aged women, and patients usually have left leg symptoms. We report the unusual case of an 18-year-old male who had pulmonary emboli caused by iliac compression syndrome without leg symptoms. Combined venography and aortography confirmed the diagnosis. The patient was successfully treated with anticoagulants and vena cava filter insertion. Iliac compression syndrome should be considered when pulmonary embolism appears without obvious cause.  (+info)

Contrast-enhanced sonography of small pancreatic mass lesions. (8/707)

OBJECTIVE: To evaluate the usefulness of contrast-enhanced wideband harmonic gray scale sonography in assessing the vascularity of small pancreatic mass lesions. METHODS: Twenty-five patients with 25 pancreatic mass lesions (20 pancreatic carcinomas, 1 islet cell tumor, 1 malignant lymphoma, and 3 focal inflammatory pancreatic masses due to chronic pancreatitis) were examined. All patients held their breath for 20 to 50 seconds after injection of a contrast agent while the vascularity of the tumor was observed on contrast-enhanced wideband harmonic gray scale sonography (early phase). We then monitored the tumor enhancement 60 to 120 seconds after the injection while the patients held their breath for a few seconds (delayed phase). RESULTS: All 20 (100%) of the pancreatic carcinomas showed no contrast enhancement in the early phase. Fifteen (75%) of the 20 pancreatic carcinomas also showed no contrast enhancement in the delayed phase. The remaining 5 (25%) pancreatic carcinomas showed mild enhancement in the peripheral regions of the tumor in the delayed phase. The other pancreatic masses showed mild or pronounced enhancement throughout the entire lesions in both the early and delayed phases. CONCLUSIONS: Contrast-enhanced wideband harmonic gray scale sonography is a useful tool for differentiating pancreatic carcinomas from focal inflammatory pancreatic masses or hypervascular pancreatic tumors.  (+info)

Multi-phase personal care compositions comprise a first phase and a second phase, wherein said first and second phases form a visually distinct pattern. The compositions are intended for moisturizing or conditioning skin or hair and comprise less than about 10%, by weight of the multi-phase personal care composition, of surfactant. Methods of moisturizing or conditioning skin or hair comprise the steps of wetting the skin or hair, applying the multi-phase personal care composition to the skin or hair, and rinsing the multi-phase personal care composition from the skin or hair. A process for making the multi-phase personal care composition comprises forming a first phase by premixing an oil / emollient benefit agent and oil-soluble colorant and then combining the premix with additional optional ingredients.
A 72-year-old man was admitted for recurrent episodes of chest pain 3 months after stent deployment in the left anterior descending (LAD) artery. The patient underwent a computerized tomographic (CT) examination of the thorax with a multislice spiral CT scanner (MSCT) (Somatom Volume Zoom, Siemens). A dynamic study was performed with acquisition of 20 scans at the level of the LAD distal to the stented segment during injection of 20 mL of nonionic contrast medium (370 mgI/mL); the resultant time-density curves were suggestive of high-grade stenosis (Figure 1A). Thereafter, a cardiac CT scan with retrospective electrocardiographic gating and injection of 110 mL of contrast medium was performed. Axial images were reconstructed with an absolute delay of 400 ms before the next R-wave. Three-dimensional volume-rendered images were also obtained; 2 overlapping stents were identified in the mid LAD without lumen reduction at the margins (Figures 2A and 2B). Coronary angiography documented a ...
BACKGROUND: Conventional coronary angiography (CA) is still recommended before valvular surgery. Preliminary studies suggest that multislice spiral computed tomography coronary angiography (MSCT-CA) can be used to rule out coronary artery disease (CAD). AIM: To assess prospectively the safety of ruling out CAD before surgery solely on the basis of normal MSCT-CA in patients with severe aortic valve disease. METHODS: We included all consecutive patients scheduled for aortic valve surgery. We first estimated the calcium score (Agatston score equivalent [ASE]). Patients underwent injected MSCT if the ASE was|1000. CA was cancelled when MSCT-CA quality was sufficient and showed no significant CAD. Our primary endpoint was the occurrence of perioperative myocardial infarction in patients who underwent surgery with no prior CA. RESULTS: Between 1st July 2005 and 30th June 2008, we included 199 patients with severe aortic valve disease: 118 men (59%); mean age 69+/-12 years; 63 patients (32%) underwent CA
Treatment of acute ischemic stroke (AIS) is aimed at salvaging viable but ischemic brain by opening the occluded artery and restoring anterograde perfusion as quickly as possible. Time saved while making critical decisions correctly is vital in AIS management. Conventional angiography is invasive, resource intensive and not feasible as a fast diagnostic tool. Perfusion CT and MRI are both susceptible to patient motion, need trained personnel to process and take at least 10-30 min to acquire and interpret. The investigators have developed a new imaging tool, multi-phase CT Angiography (CTA), which generates multiple time resolved images of backfilling arteries beyond a blocked artery filled by collaterals.. Investigators seek to determine: i) if patients with AIS will have a differential clinical response to early recanalization based on collateral status assessed on multi-phase CTA, ii) if the extent to which collateral assessment on multi-phase CTA resembles perfusion CT in predicting which ...
The principal aim of this study is to assess the diagnostic accuracy (sensitivity, specificity, predictive values) of multislice spiral computed tomography (MSCT) coronary angiography among patients having idiopathic hypokinetic dilated cardiomyopathy in sinus rhythm, compared to conventional coronary angiography. The secondary aims are to assess the performance of MSCT in coronary sinus anatomy assessment, and in quantitative measurement of left ventricular anatomical criteria (telediastolic diameter, septal and posterior wall thickness, and ejection fraction) compared to echocardiography. Lastly, renal tolerance of MSCT will be studied. This prospective monocentric study will include 120 patients scheduled to undergo coronary angiography for etiologic diagnosis of idiopathic cardiomyopathy (defined by a left ventricle echographic ejection fraction ≤ 40 %, without anamnestic or electrocardiographic arguments in favour of coronary artery disease) in sinus rhythm. MSCT will be performed within ...
Background. End-stage renal disease (ESRD) patients exhibit increased cardiovascular mortality associated with cardiovascular calcifications and endothelial dysfunction. As circulating endothelial progenitor cells (EPCs) harbour vascular regenerative potential and are altered in uraemia, we examined clinical and biochemical factors influencing EPC levels as well as the relation between EPC numbers and function and uraemic cardiovascular calcifications.. Methods. Sixty-five haemodialysis patients were investigated. Cardiovascular calcifications were assessed by multi-slice spiral CT (MSCT, n = 44) with the calculation of coronary Agatston scores and indirectly by carotid-femoral pulse wave velocity (PWV, n = 61). EPCs were quantified in peripheral blood (CD34+/KDR+) and at day 7 after ex vivo cultivation (ac-LDL+/lectin+) by flow cytometry. In addition, colony-forming units (CFUs), migratory activity, adhesion and viability of isolated EPCs were analysed.. Results. EPC numbers were reduced (P , ...
Peer-Reviewed Study Published in the Journal of Electrocardiology Confirms Cardisios Non-Invasive, Low-Cost Test as a Highly Accurate CAD Detection Tool. FRANKFURT, Germany, Jan. 13, 2020 /PRNewswire/ - The Journal of Electrocardiology has published a study showing unparalleled accuracy in non-invasive coronary artery disease (CAD) detection using Cardisios new low-cost method which involves no radiation exposure.. The study demonstrates a sensitivity of over 97% in male patients and over 90% in female patients, and specificity of over 74% and over 76%, respectively.. Cardisiography is a new, unique testing method developed by the European startup Cardisio that delivers highly precise results within just a few minutes. It is a non-invasive, independent, repeatable, fast, and cost-effective method of detecting CAD in the resting heart. It offers a complementary and more effective alternative to traditional procedures such as stress ECG and echocardiography for early identification of heart ...
.font-size-text { font-family: Arial; font-size: 14px; font-style: normal; font-weight: normal; font-variant: normal; color: #999; } Description Nutrex Research Lipo-6x 120 capsules Advanced Formula Liquid Multi-Phase Technology Burn Fat Fast Dietary Supplement Multi-Phase Capsules VCaps Capsule of Plant Origin Free of Animal Products Lipo-6X is the worlds most advanced fat burner using a new and superior liquid Multi-Phase technology. This unique Multi-Phase technology combines rapid liquid capsules delivery with controlled-release inside capsule technology. What this means is that Lipo-6X is the only fat burner that has multiple release phases, both fast and extended: Phase #1 Rapid Release Liquid Capsule: The outer liquid capsule of Lipo-6X ensures a rapid and almost instant uptake of its appetite-suppressing fat-burning, thyroid-boosting and energy promoting ingredients. Within minutes of taking Lipo-6X you will feel all the
A mild, multi-phase cleansing composition is described that includes a cleansing phase including a structured surfactant component has a first density; a benefit phase includes an emulsion, the benefi
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The ideal cardiac scan length could be matched by the adaptive collimation in every case while the mean scanned length was longer by 15.4% with the 64 × 0.6 mm and by 27.2% with the fixed 96 × 0.6-mm collimation. While the DLP was almost identical between the adaptive and the 64 × 0.6-mm collimation (83 vs. 89 mGycm at 120 kV), it was 62.7% higher with the 96 × 0.6-mm collimation (135 mGycm), p , 0.001.. ...
This study shows through a national impact analysis that the Pipeline program had a significant positive impact on increasing the number of weeks spent in extramural community rotations at fifteen Pipeline dental schools compared to dental schools not involved in the program. While the program was more successful in increasing the rotation time for schools that started it with little available time for student rotations, for any school with a 2003 baseline rotation time of up to seven weeks, Pipeline schools received a positive boost over the 2007 rotation time reported by students at non-Pipeline schools. While it is not possible to pinpoint the exact components of the Pipeline program that resulted in such differences, it is clear that involvement in the program resulted in increased time in extramural community rotations.. Relating the findings of this analysis with the goals of the Pipeline program and with the published literature may provide interesting insights for schools interested in ...
The aim of this study was to evaluate the usefulness of annual screening for lung cancer by low-dose computed tomography (CT) and the characteristics of identified lung cancers. Subjects consisted of 5483 general population aged 40-74 years, who received initial CT scans in 1996, followed by repeat …
With the CT scanner used in this study, the mean scan time of a thinly collimated spiral CT scan of the brain was 30 seconds, approximately 2 times longer than the mean scan time of a thickly collimated sequential CT scan. A minor disadvantage of this relatively long scan time is the increase of the risk of motion of the patient during data acquisition. In this study, at least 1 patient had moved during acquisition of the spiral scan, which affected the image quality and caused the observers to have a preference for the sequential technique. With the recent introduction of CT scanners with 16 to 64 detector arrays, this potential drawback will disappear because of the vastly reduced scan time.. Another potential drawback of thinly collimated spiral CT is the larger reconstruction time. Because of the relatively small reconstruction increment of the spiral scans, approximately 10 times more images are reconstructed. On our CT scanner, this resulted in an increase of the reconstruction time of ...
The first group of patients (A) were examined using standard head technique as well as with the default protocols used by the Radiographers at the center. The CTDIvol and DLP were extracted from the monitor and the 75th percentile were calculated. Subsequently, there was a scrutiny of tube current (mA) and modulation option, tube potential (kVp), gantry rotation time (seconds), scan range for cranial exams (mm), pitch, and azimuth for supine scanogram. The values of the parameters set in the protocol was noted to for ease of reversal if need be. The kVp was reduced from 140 to 120. The mA was moved from 250 to a range of 180 to 220 using automatic mA modulation. Gantry rotation time was moved from 1 sec to 0.7 s. Scan range was adjusted to 140 mm from 250 mm. The pitch of 0.75 was replaced with 1.5 to minimize gantry rotations/ series. Cranial examinations were done supine as recommended but at an improper azimuth of 0 and 90 degrees. This corresponds to anteroposterior (AP) and lateral ...
Poster: ESCR 2016 / P-0018 / Dose and image quality in CT pulmonary angiography: Comparison of Dual-Source CT, third generation Dual-Energy CT and conventional 64-slice spiral CT by: A. Kosmala, T. Gassenmaier, S. Veldhoen, A. Kunz, T. A. Bley, B. Petritsch; Würzburg/DE
Although no professional organization as yet recommends screening for lung cancer, steps have been taken in this direction. During the National Lung Screening Trial it was found that people at risk of lung cancer - heavy current and former smokers between the ages of 55 and 74 - who received a newer type of CT scan called low-dose spiral CT had a 20 percent lower risk of dying from lung cancer than participants who received standard chest X-rays. The scan was able to detect early lung cancers and provide more detailed pictures than the X-ray. The problem is that the screening is very expensive and no standard work-up for abnormal findings has been established, according to Ebright ...
NEWSYSLOG.CONF(5) FreeBSD File Formats Manual NEWSYSLOG.CONF(5) NAME newsyslog.conf -- newsyslog(8) configuration file DESCRIPTION The newsyslog.conf file is used to set log file rotation configuration for the newsyslog(8) utility. Configuration may designate that logs are rotated based on size, last rotation time, or time of day. The newsyslog.conf file can also be used to designate secure permissions to log files at rotation time. During initialization, newsyslog(8) reads a configuration file, normally /etc/newsyslog.conf, to determine which logs may potentially be rotated and archived. Each line has five mandatory fields and four optional fields, separated with whitespace. Blank lines or lines beginning with `# are ignored. If `# is placed in the middle of the line, the `# character and the rest of the line after it is ig- nored. To prevent special meaning, the `# character may be escaped with `\; in this case preceding `\ is removed and `# is treated as an ordi- nary character. The ...
A pioneering demonstration of DSCT as an alternative to absorption imaging by using its scattering selectivity to poorly ordered samples of soft tissue such as muscle, bone or fat (adapted from Kleuker et al., 1998 ...
See a few selected examples of images produced by the SC-EMA package below. The software visualizes of both single-crystalline input parameters in the form of directional dependencies of the Youngs modulus (see the upper row of figures) and output homogenized elastic moduli, i.e. Youngs, bulk and shear ones, for two-phase and three-phase composites (see the middle and bottom row of images, respectively ...
Principal Investigator:KAWAI Kiyoshi, Project Period (FY):2009 - 2011, Research Category:Grant-in-Aid for Young Scientists (B), Research Field:Food science
This patent search tool allows you not only to search the PCT database of about 2 million International Applications but also the worldwide patent collections. This search facility features: flexible search syntax; automatic word stemming and relevance ranking; as well as graphical results.
Inclusion Criteria: - Participants must have histologically confirmed advanced NSCLC (with a confirmed KRAS mutation via any CLIA-certified method) for which curable treatment modalities are not an option - Part I Dose Escalation: Participants are required to have measurable disease per RECIST 1.1 within 4 weeks of study entry - MTD Expansion and Part II: Participants must have measurable disease, defined as at least one lesion that can be accurately measured in at least one dimension (longest diameter to be recorded) as , 20 mm with conventional techniques or as , 10 mm with spiral CT scan. See section 10 for the evaluation of measureable disease. - Age ≥ 18 years. Because no dosing or adverse event data are currently available in participants , 18 years of age, children are excluded from this study - Participants are permitted to have any number of prior therapies prior to enrollment - ECOG performance status , 2 (see Appendix A). - Participants must have normal organ and marrow function as ...
5. At least 1 radiographically documented measurable lesion in a previously non-irradiated area according to RECIST, i.e. this lesion must be adequately measurable in at least one dimension (longest diameter [LD] to be recorded) as ≥2 cm by conventional techniques or ≥1 cm by spiral CT scan ...
Background and Purpose:Esophageal carcinoma is one of the common malignant tumors of digestive tract with poor prognosis. The cause of esophageal carcinoma is complicated. Because esophagus has no s
Non-invasive coronary CT angiography (CTA) is more cost-effective than current tests for diagnosing women with low risk of a heart attack who come to the emergency room with acute chest pain, according to a recent study.
64 rows volume CT (GE,USA)The hospital has equipped with 3 CT scanners (8,16 ,64 rows spiral CT). 64 rows spiral CT is the best of the same kind products. It has the feature of fast-scanning(whole body scanning within 10S),wonderful images,high resolution,low dose of x-ray.Care Areas:1 Early detecti…
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Objective: To analyse the diagnostic value of multi-slice spiral CT and magnetic resonance imaging in treatment of Hepatic Veno-Occlusive Disease (HVO..
A multi-phase solid toilet article whose phases are separated by a membrane, and processes for making the article are described. Each phase is reproducibly fabricated to form an article allowing the user to sequentially or simultaneously derive benefits from the different materials contained in the articles layers. The membrane is either at least partially water soluble or dispersible in the case of a product used with water, or shearable in the case of a cosmetic product which is applied directly to or rubbed on the skin. The membrane material is selected to dissolve or disintegrate with product use, so as to accomplish its intended function of separating the different cosmetic materials until they are consumed. The flowable toilet or cosmetic formulations are simultaneously or separately transferred into the mold, simultaneously or separately allowed to harden, where the membrane divider is not removed and becomes a part of the finished product. The hardened multi-phase article is finally ejected
Have we then found the holy grail of non-invasive coronary imaging?. The ability to visualise coronary arteries directly, assess cardiac function, and detect subclinical disease from a 20 second scan make MDCT more attractive than conventional stress testing. However, the significant radiation exposure makes it unattractive to screen the low risk population. Similarly, there is no justification for imaging high risk patients who clearly require coronary angiography and percutaneous intervention, without additional radiation exposure. It is unlikely that the financially constrained UK health system will adopt routine MDCT in the accident and emergency department to triage chest pain patients for rule out of pulmonary embolism, aortic dissection, and coronary disease.. The present niche of MDCT should be as an adjunct to coronary catheterisation in the assessment of patients and a useful gatekeeper ensuring appropriate triage of patients for catheterisation. This is especially true in the ...
What is the role of invasive versus non-invasive coronary angiography in the investigation of patients suspected to have coronary heart disease? Academic Article ...
Objective: To investigate the usefulness and effectiveness of multi-slice spiral computerized tomographic fistulography (MSCTF) in the diagnosis and treatment of congenital fistula of neck. Methods: Thirty-four patients with thyroglossal fistulasor branchial cleft fistulas who were initial treated from July 2008 to August 2015 in Fujian Provincial Hospital were retrospectively analyses. Thirteen males and 21 females patients aging from 3 to 46 years old with a median age of 37 were included. There were thyroglossal fistula in 6 cases, the first branchialcleft fistula in 9 cases, the second branchialcleft fistula in 3 cases, the third branchialcleft fistula in 9 cases, and the fourth branchialcleft fistula in 7 cases ...
Our past and current studies performed at Multi-Phase Trials, LLC in San Antonio are listed here for patients to look through so they can decide which study is right for them and see our track record.
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If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Centers RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.. ...
Whole-brain helical tomotherapy with integrated boost for brain metastases in patients with malignant melanoma – final results of the BRAIN-RT trial
OBJECTIVE The purpose of this study was to compare two time delays between injection of contrast material and helical CT scanning to determine relative conspicuity of hepatic metastases. SUBJECTS AND METHODS Twenty-five patients with hepatic metastases were examined with helical CT. The first imaging phase was initiated at 50 sec and the second 75 sec after the start of contrast material injection (3 ml/sec, 150 ml). Differences in lesion and liver attenuation were measured quantitatively. Four radiologists used a 5-point scale to assess lesion conspicuity subjectively. RESULTS Mean differences in enhancement between liver and lesion were 41 H during the first phase and 59 H for the second phase (p = .0001). Radiologists conspicuity score averaged 2.4 for lesions in the first phase versus 3.3 for lesions in the second phase (p = .0001). In 56 (88%) of 64 lesions, objective measurements showed greater enhancement of lesions during the later phase. Radiologists found 60 (94%) of 64 lesions to be more
With the advent of helical CT, the capability of noninvasive imaging of the thoracic aorta has been enhanced considerably. In this article, we describe the potential of helical CT using dual-slice technology to evaluate thoracic aortic diseases such
Pulmonary embolism symptoms are not specific, different diagnoses, including unknown malignancies or life threatening conditions such as aortic rupture or dissection can arouse similar complaints and discomforts. Location and extention of the emboli, origin of the disease are easily can be shown by EBCT. Although pulmonary angiography is considered to be the reference standard for the detection of emboli, it is used infrequently because it is invasive and can cause complications [1]. In addition its ability to depict isolated peripheral emboli does not seem to exceed the accuracy of CT [2]. CT appears to be the most cost efective tool in the diagnostic algorithm of pulmonary embolism [1]. Scintigraphy enables a reliable functional assesment of lung ventilation and perfusion, but it lacks spatial resolution. Thus potentially life threatening alternative causes of the patient`s clinical signs and symptoms are easily missed [1]. According to the specific advantages of spiral CT angiography over ...
The spiral is symbolic of growth and momentum, as seen in the unfolding of ferns and rising of waves and on a snails shell it represents protection and containment. The spiral pattern has manifested itself in the art, architecture and philosophy of several ancient cultures and countries, ranging from stone-age societies in Europe and pre-dynastic Egypt to countries like China and Peru. The power of the spiral for me is best illustrated in the rotating, impenetrable formation called Arjunas Chakravyuha in the grand Indian epic -Mahabharat. In the myth, the continuous spiral is at once a rotating, growing and moving form that protects what lies within.. The installation- Spiral is made up of approximately 1000 individually made black and white cones; each white cone has a spiral painted on it. The handmade cones are similar to what mathematicians call a Concho-spiral or a Conical Spiral- i.e. a spiral on a spiral base. The cones are tightly placed together to form a dynamic large spiral that is ...
Multidetector-row computed tomography (MDCT) has advanced the approach to diagnostic assessment of many pathologies and now plays an integral role in imaging of both abdominal and cardiovascular diseases. The possibility to acquire diagnostic images with shorter scan duration, longer scan ranges.
Scientists around the world depend on LECO elemental analyzers, time-of-flight mass spectrometers (TOFMS), two-dimensional gas chromatography, and metallography and optical equipment.
syngo Colonography CT is a clinical application dedicated for noninvasive evaluation of the entire colon based on low-dose, high-resolution spiral CT scans.
The study shows that use of a powerful imaging tool, i.e., spiral CT, finds lung cancers when they are very small, and when prognosis is measurably better than when tumors are larger and advanced. The findings reported here are from multiple institutions, providing confidence that their model can duplicated in other settings, and the authors have shown that concerns about excessive false positive rates can be addressed by adherence to protocols for measuring lesion size and growth as a criteria for biopsy. Positivity rates are quite modest, and the predictive value at time of biopsy is quite high.. The authors also show that survival is more favorable when treatment is initiated rapidly after diagnosis (the literature shows that even small delays in treating lung cancer can adversely affect the survival rate). With respect to the question of whether the cancers they are finding are truly life threatening, all patients who had treatable lung cancers and refused treatment have died. The excellent ...
TY - JOUR. T1 - Non-Hodgkin lymphoma. T2 - Pattern of disease at spiral CT. AU - Sheth, S.. AU - Fishman, E. K.. PY - 2001/1/1. Y1 - 2001/1/1. UR - http://www.scopus.com/inward/record.url?scp=0035677929&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0035677929&partnerID=8YFLogxK. U2 - 10.3109/20014091086775. DO - 10.3109/20014091086775. M3 - Review article. C2 - 11802475. AN - SCOPUS:0035677929. VL - 42. SP - 307. EP - 356. JO - Critical Reviews in Diagnostic Imaging. JF - Critical Reviews in Diagnostic Imaging. SN - 1040-8371. IS - 6. ER - ...
The National Lung Screening Trial (NLST), a research study sponsored by the National Cancer Institute that used low-dose helical CT scans or chest X-ray to screen men and women at risk for lung cancer.
And very time consuming. Thats the first problem, the other problem is the gray-scaling, so the Hounsfield units who are quite variable ~, so you have to recalibrate, if you want to do that. So, for the moment, the only really option for adaptation is just to restart all over again: so make another CT-scan, a planning CT-scan, and redo the contouring. Ok, for the moment, with the software we have, where we can do fusions. Non-rigid fusions make it much easier to redo a contouring, but still it is very time-consuming. So, as I already said, quite often its ... if there is a big difference, then, ok, everybody agrees: ok, we should replan. If its a small difference, then, from experience, I know, we rather close our eyes, and say: ok, well check out tomorrow again. And then the day after: ok, the difference is a bit less. And then the next day its even worse, and then ... The problem is now also with this 3D-imaging, that we know much more than before. So things that passed easily in earlier ...
To describe a new method to measure the cochlear parameters using Otoplan software, and to compare it with the traditional method using curved multiplanar
The development of low-dose spiral computed tomography (CT) has rekindled hope that effective lung cancer screening might yet be found. Screening is justif
Cardiac imaging by multi-slice computed tomography (MSCT) is a recently developed technique for assessing the function of the heart and coronary arteries non-invasively.
Over the past 20 yrs, helical CT of the chest has become the procedure of choice for PE diagnosis. Diagnostic performances of helical CT have been evaluated in two types of studies: accuracy and outcome studies. Accuracy studies are designed to establish the characteristics of a diagnostic test (sensitivity and specificity) by comparing test results with a reference diagnostic test (gold standard). Outcome studies evaluate patient outcomes when a given diagnostic test or strategy is used for clinical decision-making. In the field of PE, the outcome measurement is the rate of VTE events (DVT or PE) during a 3-month follow-up period in patients left untreated by anticoagulants. The reference for comparison is the rate of DVT or PE in patients left untreated after a negative pulmonary angiography, which is 1-2%, with an upper limit of the 95% confidence interval of 3% during a 3-month follow-up [38].. The reported sensitivity of single-detector helical CT ranged 53-100% and specificity ranged ...
Smiths Medical and bioAffinity Technologies Partner to Advance Non-Invasive Testing for Early Lung Cancer - read this article along with other careers information, tips and advice on BioSpace
This book is a comprehensive guide to the cardiac CT, its current state, applications, and research. Cardiac CT is no longer solely for non-invasive coronary artery stenosis detection; it is used for personalized cardiovascular risk stratification and planning cardiovascular surgery, among others.
Read Protocols for Multislice CT 4- and 16-row Applications by with Rakuten Kobo. Multislice technology has made it possible to investigate large sections of the human body in a very short time. The 4- ...
An apparatus and method of driving a transfer belt are disclosed. The apparatus and method comprise driving the transfer belt provided in an image forming apparatus by a predetermined distance when the transfer belt has been stopped for a predetermined time, and thus varying the contact portion with a plurality of rollers provided on the transfer belt. Image contamination due to deformation on the belt can be avoided. Additionally, because the rotation time of the driving source can be set to a predetermined time during the power-saving mode, power consumption can be minimized.
Dramatic improvements in high-resolution, or spiral, CT imaging over the past decade have created widespread and increasing demand for both lung and cardiac screening, two procedures that could and probably should be combined, according to David Yankelevitz, MD, professor of radiology at Weill Medical College of Cornell University in New York.
The Golden Mean Spiral is the ideal and correlates to Source. It is the symbol of life s unfolding mysteries. With each revolution the spiral reveals a complete cycle of evolution. It offers a wiser and more all-encompassing perspective gleaned from growing by learning all angles of each experience. With their continuous curves, spirals are feminine in nature. Logarithmic spirals, like cochlea of the inner ear, reveal the intimate relationship between the harmonics of sound and geometry. ...
The Cerner Skybox Connect Network, a multi-phase project, is expected to be complete by the end of 2012. Cerner Skybox Connect provides a multi-point private network with over 1,500 local access connections throughout the United States. The service will provide automated pricing, provisioning, and ordering of tail circuits. In addition to providing network connectivity to CernerWorks(SM) managed service clients, Cerner Skybox Connect will enable Cerner to deliver the entire Cerner Skybox(SM) suite of cloud-based services such as messaging, remote desktop, storage, and protection.. To learn more about Skybox Connect visit www.cerner.com/skybox . For more information about One Marketplace Access Exchange, visit www.globalcapacity.com. About Global Capacity. Global Capacity is a telecommunications information and logistics company that improves the efficiency and reduces the cost of access networks globally. Through its One Marketplace Access Exchange, the Company brings together customers and ...
Comprehensive News Analysis Mar 10, 2017, daily news analysis for UPSC, NIO finds a new canyon system close to Kovvada coast; Ostriches lived in India once; Multi-phase polls are here to stay: Nasim Zaidi
RiTradiology.com ดูแลรักษาโดยและเป็นของ น.พ.รัฐชัย แก้วลาย. โลโก้ RiTradiology.com เป็นลิขสิทธิ์ของ น.พ.รัฐชัย แก้วลาย. ข้อมูลส่วนตัวของคุณถือเป็นความลับและจะไม่ถูกเผยแพร่ไปยังบุคคลที่สาม. ข้อมูลใน RiTradiology.com ใช้เป็นแนวทาง, ไม่ใช่เพื่อทดแทน, การให้การวินิจฉัย, รักษาและคำแนะนำสำหรับผู้ป่วย. แพทย์ของคุณอาจให้คำแนะนำในการวินิจฉัยหรือรักษาเป็นอย่างอื่นขึ้นกับข้อมูลและสถานการณ์นั้นๆ. ...
What makes Spiral Media happy is seeing our clients succeed and so were so pleased to congratulate Alterego on their recent award win!
Calories in Pork, cured, ham with natural juices, spiral slice, boneless, separable lean and fat, heated, roasted - 1 slice. Calobonga Calorie Counter
h-1. Experimental results showed that a backpulse with a duration of about 170 ms, a repeat frequency of 1 s and differential peak pulse pressure, measured at the outlet of the permeate space, of 38 kPa gave the best results for the parameters used in the current experiments. In this case the saturation flux with backpulsing was 82% of the clean water value and 3.9 times the saturation flux obtained with no backpulsing.. Keywords : Spiral wrap element; membrane cleaning; infrasonic; back pulsing. ...
A continuación podemos ver un vídeo del tema Spiral Effect perteneciente al nuevo álbum titulado Skull 13 de esta formación Americana llamada SLEEPY HOLLOW. El disco sale editado por los sellos Pure Steel Records y High Roller Records el 23 de Marzo. ...
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I'm curious if anybody has ever tried incorporating hugelkulture into an herb spiral design. I'm still very new to permaculture but I'v
Lysestake spiral som er smidd utifra massivt rundjern som er blitt varmet opp og behandlet med rå linolje for å få den grovere stilen. Deretter er den montert på en skiferfot.. ...
Kalender developed volumetric spiral computed tomography; the world's first clinical spiral CT studies were presented at RSNA ... Dose in x-ray computed tomography. Phys Med Biol 2014; 59 R129-R150 [10] Kalender WA, Beister M, Boone JM, Kolditz D, Vollmar ... Eur Radiol 2017; 27:1081-1087 [12] The 4th edition of the textbook "Computed Tomography" by WA Kalender, published by Publicis ... An integral approach to vertebral bone mineral analysis by X-ray computed tomography. Radiology 1987; 164:419-423 [2] Kalender ...
Schoepf UJ, Goldhaber SZ, Costello P (2004). "Spiral computed tomography for acute pulmonary embolism". Circulation. 109 (18): ... CT pulmonary angiogram (CTPA) is a medical diagnostic test that employs computed tomography (CT) angiography to obtain an image ... The best results are obtained using multidetector computed tomography (MDCT) scanners. An intravenous cannula is required for ... 2007). "Computed tomographic pulmonary angiography vs ventilation-perfusion lung scanning in patients with suspected pulmonary ...
Spiral computed tomography findings with pathologic correlation and management". Radiol Med. 115 (4): 539-50. doi:10.1007/ ...
January 2001). "Results of three-year mass screening programme for lung cancer using mobile low-dose spiral computed tomography ... April 1998). "Mass screening for lung cancer with mobile spiral computed tomography scanner". Lancet. 351 (9111): 1242-5. doi: ... The major research in the trial was to compare the efficacy of low-dose helical computed tomography (CT screening) and standard ... Bach PB, Jett JR, Pastorino U, Tockman MS, Swensen SJ, Begg CB (2007). "Computed tomography screening and lung cancer outcomes ...
Rogers, Scott W. (1999). "Allosaurus, crocodiles, and birds: Evolutionary clues from spiral computed tomography of an endocast ... The brain of Allosaurus, as interpreted from spiral CT scanning of an endocast, was more consistent with crocodilian brains ...
Rogers, Scott W. (1999). "Allosaurus, crocodiles, and birds: Evolutionary clues from spiral computed tomography of an endocast ...
The first problem is reduced by use of a helical motion, as in spiral computed tomography. Some research has suggested ...
"Relation of oral anticoagulation to cardiac valvular and coronary calcium assessed by multislice spiral computed tomography". ...
A CT scan or computed tomography scan (formerly known as computed axial tomography or CAT scan) is a medical imaging technique ... "for the development of computer-assisted tomography". Spinning tube, commonly called spiral CT, or helical CT, is an imaging ... "Biomechanical computed tomography-noninvasive bone strength analysis using clinical computed tomography scans". Annals of the ... Cardiovascular Computed Tomography. Oxford University Press. ISBN 978-0-19-880927-2. "computed tomography - Definition from the ...
Computed tomography of the head. *Quantitative computed tomography. *Spiral computed tomography. *High resolution CT ... Analytical techniques, much like the reconstruction of computed tomography (CT) and single-photon emission computed tomography ... 2010). "Clinical value of 18F-fluorodihydroxyphenylalanine positron emission tomography/computed tomography (18F-DOPA PET/CT) ... Qi, J.; R. Leahy (2006). "Iterative reconstruction techniques in emission computed tomography". Physics in Medicine and Biology ...
Spiral computed tomography with intravenous radiocontrast is the imaging study of choice to evaluate for pulmonary embolism. ...
Brown CV, Antevil JL, Sise MJ, Sack DI (May 2005). "Spiral computed tomography for the diagnosis of cervical, thoracic, and ... In those with significant trauma X-ray computed tomography is a more accurate test. Current opinion now suggests that X-ray of ... A computed tomographic analysis of the effects of helmet removal". Am J Sports Med. 28 (6): 800-3. doi:10.1177/ ...
Echocardiography Spiral Computed Tomography, Color Doppler and Ultrasonography Renal Transplantation and Renal Hemodialysis ...
... inventor of spiral scan computed tomography and professor at the University of Erlangen-Nuremberg Dennis Keeney, soil scientist ... quantum theorist of computing Warren Weaver, pioneer of machine translation I. Bernard Weinstein, physician Louis Jolyon West, ... computer science professor and founder of the Condor High-Throughput Computing System William Lorenz, Army Distinguished ...
Prize Spinplasmonics Spinthariscope Spintronics Spin-charge separation Spin-orbit interaction Spiral computed tomography Spiral ... equation Singing arc Singing sand Single-molecule magnet Single-particle spectrum Single-photon emission computed tomography ... Scale invariance Scale relativity Scaling limit Scanning Acoustic Tomography Scanning SQUID microscope Scanning acoustic ... Seiche Seifallah Randjbar-Daemi Seismic metamaterials Seismic migration Seismic refraction Seismic source Seismic tomography ...
Computed tomography (CT) is an imaging modality that produces a 3-dimensional radiograph. A series of plain radiographs are ... taken in a spiral around the site of interest, and the individual 2-D radiographs are converted into a 3-D image by a computer ... "A technique for computed tomography (CT) of the foot in the standing horse". Equine Veterinary Education. 20 (2): 93-98. doi: ... Computed Tomography and Magnetic Resonance Imaging for Evaluation of Navicular Syndrome in the Horse". Veterinary Radiology & ...
In 1988, he was asked to lead the development of a Spiral computed tomography scanner that will exceed the performances of any ... Guido Pardo-Roques is the "father" of Multi-Slice Computed Tomography (MSCT). He is Chairman of the Medical Equipment Forum, ... to substantially reduce by half the imaging time and to perform Computed tomography of the heart, cardiac imaging. Hundreds of ...
... tomography, spiral computed MeSH E01.370.350.600.350.800 - tomography, emission-computed MeSH E01.370.350.600.350.800.399 - ... tomography, x-ray computed MeSH E01.370.350.825.810.810.800 - tomography, spiral computed MeSH E01.370.350.840 - ... computed tomographic MeSH E01.370.350.700.810.810.800 - tomography, spiral computed MeSH E01.370.350.700.830 - urography MeSH ... computed tomographic MeSH E01.370.350.350.810.800 - tomography, spiral computed MeSH E01.370.350.400 - imaging, three- ...
Unbarred spiral galaxy Short axis, in single-photon emission computed tomography Surface area Seaman apprentice, a U.S. Navy ...
Analytical techniques, much like the reconstruction of computed tomography (CT) and single-photon emission computed tomography ... Harmany, Z.; R. Marcia; R. Willett (2010). "SPIRAL out of Convexity: Sparsity-regularized Algorithms for Photon-limited Imaging ... In modern PET computed tomography scanners, three-dimensional imaging is often accomplished with the aid of a computed ... 2010). "Clinical value of 18F-fluorodihydroxyphenylalanine positron emission tomography/computed tomography (18F-DOPA PET/CT) ...
As of 2005, it increasingly appears that the spiral CT designs, especially those with 64 detector rows, 3×360°/sec rotation ... Electron beam computed tomography (EBCT) is a specific form of computed tomography (CT) in which the X-ray tube is not ... "Computed Tomography Techniques and Principles. Part a. Electron Beam Computed Tomography". In Anagnostopoulos, Constantinos D ... Peebles, C R (1 June 2003). "Non-invasive coronary imaging: computed tomography or magnetic resonance imaging?". Heart. 89 (6 ...
Swennen GR, Schutyser F (September 2006). "Three-dimensional cephalometry: spiral multi-slice vs cone-beam computed tomography ... flat panel CT or Digital Volume Tomography (DVT)) is a medical imaging technique consisting of X-ray computed tomography where ... Cone beam computed tomography (or CBCT, also referred to as C-arm CT, cone beam volume CT, ... "Cone Beam-Computed Tomography in Endodontics" (PDF). www.aae.org. Summer 2011. Retrieved October 21, 2019. New AAOMR Guidelines ...
Spiral computed tomography, or helical computed tomography, is a computed tomography (CT) technology in which the source and ... Helical (or spiral) cone beam computed tomography is a type of three-dimensional computed tomography (CT) in which the source ( ... X-ray computed tomography operates by using an X-ray generator that rotates around the object; X-ray detectors are positioned ... In cone-beam computed tomography (commonly abbreviated CBCT), the X-ray beam is conical. ...
computed tomography Production of images of a cross-section through an object by multiple X-ray measurements processed in a ... compact fluorescent lamp A fluorescent lamp with a folded or spiral tube, designed to fit in the same space as an incandescent ... Contents: Top 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z See also References External links ubiquitous computing A ...
... computed tomography (CT), nuclear medicine including positron emission tomography (PET), and magnetic resonance imaging (MRI) ... Spiral multidetector CT uses 16, 64, 254 or more detectors during continuous motion of the patient through the radiation beam ... computed tomography (CT), nuclear medicine including positron emission tomography (PET), and magnetic resonance imaging (MRI). ... single-photon emission computed tomography - SPECT or Positron-emission tomography - PET). In the most modern devices, nuclear ...
June 2006). "Multidetector computed tomography for acute pulmonary embolism". The New England Journal of Medicine. 354 (22): ... Van Strijen MJ, De Monye W, Kieft GJ, Pattynama PM, Prins MH, Huisman MV (January 2005). "Accuracy of single-detector spiral CT ... CT pulmonary angiography (CTPA) is a pulmonary angiogram obtained using computed tomography (CT) with radiocontrast rather than ... and computed tomography". JAMA. 295 (2): 172-9. doi:10.1001/jama.295.2.172. PMID 16403929. Roy PM, Meyer G, Vielle B, Le Gall C ...
... computed tomographic colonography - computed tomography - computed tomography colography - computerized axial tomography - ... spiral CT scan - splenomegaly - sputum cytology - squalamine lactate - squamous cell - squamous cell carcinoma - squamous ... single-photon emission computed tomography - siplizumab - sirolimus - small cell lung cancer - small intestine - smoldering ... helical computed tomography - helper T cell - hemagglutinin-neuraminidase - hemangiopericytoma - hemangiosarcoma - hematogenous ...
... single-photon emission computed tomography - SPECT or Positron-emission tomography - PET). In the most modern devices, nuclear ... Spiral multidetector CT uses 16, 64, 254 or more detectors during continuous motion of the patient through the radiation beam ... computed tomography (CT), nuclear medicine including positron emission tomography (PET), fluoroscopy, and magnetic resonance ... The introduction of computed tomography in the early 1970s revolutionized diagnostic radiology by providing Clinicians with ...
High-resolution computed tomography. *Spiral CT. *Ventilation/perfusion scan. CPRs. *Pneumonia severity index ...
Analytical techniques, much like the reconstruction of computed tomography (CT) and single-photon emission computed tomography ... Harmany, Z.; R. Marcia; R. Willett (2010). "SPIRAL out of Convexity: Sparsity-regularized Algorithms for Photon-limited Imaging ... In modern PET computed tomography scanners, three-dimensional imaging is often accomplished with the aid of a computed ... 2010). "Clinical value of 18F-fluorodihydroxyphenylalanine positron emission tomography/computed tomography (18F-DOPA PET/CT) ...
3D rendering of a computed tomography scan of a leaf. Leaves are the most important organs of most vascular plants.[8] Green ... Leaves of the White Spruce (Picea glauca) are needle-shaped and their arrangement is spiral ...
Magnetic resonance imaging (MRI) and single-photon emission computed tomography (SPECT) are two of the tests that can identify ... Lyme disease is caused by spirochetes, spiral bacteria from the genus Borrelia. Spirochetes are surrounded by peptidoglycan and ...
Quantitative computed tomography(英语:Quantitative computed tomography). *Spiral computed tomography(英语:Spiral computed ... Computed tomography of the heart. *Computed tomography of the abdomen and pelvis(英语:Computed tomography of the abdomen and ... 3D / ECT(英语:emission computed tomography). *SPECT(英语:Single-photon emission computed tomography) *gamma ray: Myocardial ... Computed tomography of the head(英语:Computed tomography of the head) ...
Computed tomography of the head. *Quantitative computed tomography. *Spiral computed tomography. *High resolution CT ... "Confocal X-ray Fluorescence Imaging and XRF Tomography for Three Dimensional Trace Element Microanalysis". Microscopy and ...
Horn Investigated by X-ray Computed Tomography and Histology With Implications for Growth and External Form" (PDF). Journal of ... "Assam rhino poaching 'spirals'". BBC News. Retrieved 23 August 2008.. *^ Derr, Mark (11 July 2006). "Racing to Know the Rarest ...
Inner ear congenital anomalies are related to sensorineural hearing loss and are generally diagnosed with a computed tomography ... The endolymph is situated in two vestibules, the utricle and saccule, and eventually transmits to the cochlea, a spiral-shaped ... This causes the cell to depolarise, and creates an action potential that is transmitted along the spiral ganglion, which sends ... The cochlea is a spiral shell-shaped organ responsible for the sense of hearing. These structures together create the ...
For non-medical computed tomography, see industrial computed tomography scanning. For non-X-ray tomography, see Tomography. ... Spinning tube, commonly called spiral CT, or helical CT is an imaging technique in which an entire X-ray tube is spun around ... X-ray computed tomography (X-ray CT), computerized axial tomography scan (CAT scan),[2] computer aided tomography, computed ... "computed tomography" could be used to describe positron emission tomography or single photon emission computed tomography ( ...
Relatively inexpensive compared to other modes of investigation, such as computed X-ray tomography, DEXA or magnetic resonance ... When the transducer traverses the area in a spiral, an area of 100 cm2 can be scanned in around 10 seconds.[22] ...
A chest x-ray is useful to confirm or rule out a pneumothorax, pulmonary edema, or pneumonia.[14] Spiral computed tomography ...
Electron beam computed tomography. *Cone beam computed tomography. Targets. *Coronary *Calcium scan ... Both gradient coils can also be turned on in a specific sequence to trace a spiral shape in k-space. This spiral imaging ...
Computed tomography scan of nasopharynx. *X-ray lateral view of nasopharynx. Detailed nasal examination should always be done ...
2006). "Multidetector computed tomography for acute pulmonary embolism". N. Engl. J. Med. 354 (22): 2317-27. doi:10.1056/ ... Chest spiral CT scan with radiocontrast agent showing multiple filling defects of principal branches of the pulmonary arteries ... and computed tomography". JAMA. 295 (2): 172-9. doi:10.1001/jama.295.2.172. PMID 16403929.. CS1 maint: multiple names: authors ... Van Strijen, MJ; De Monye, W; Kieft, GJ; Pattynama, PM; Prins, MH; Huisman, MV (2005). "Accuracy of single-detector spiral CT ...
Computed tomography (CT)[cuir in eagar , athraigh foinse]. Príomhalt: X-ray computed tomography ... Spiral Multi-detector CT uses 8, 16, 64 or more detectors during continuous motion of the patient through the radiation beam to ... single-photon emission computed tomography). In the most modern devices Nuclear Medicine images can be fused with a CT scan ... CT imaging uses X-rays in conjunction with computing algorithms to image the body.[3] In CT, an X-ray generating tube opposite ...
Computed tomography (CT scanning) is a more sensitive test for pulmonary contusion, and it can identify abdominal, chest, or ... Peitzman AB, Rhoades M, Schwab CW, Yealy DM, Fabian TC (2007). The Trauma Manual: Trauma and Acute Care Surgery (Spiral Manual ... ISBN 0-7817-5003-2. Le Guen M, Beigelman C, Bouhemad B, Wenjïe Y, Marmion F, Rouby JJ (2007). "Chest computed tomography with ...
New cranial analysis using computed axial and single photon emission computed tomography scans in 2004 showed, at least in the ... Recording of the bearded seal's "spiralling trill," one of the most phenomenal vocalizations of the underwater kindgdom: http ...
Computed Tomography (CT scanner) - Godfrey Newbold Hounsfield. *Gray's Anatomy widely regarded as the first complete human ... "Spiral galaxies - William Parsons, 3rd Earl of Rosse".. *^ "History: Edmond Halley".. *^ Hewish, A (June 1975). "Pulsars and ... Computing[edit]. *ACE and Pilot ACE [67] - Alan Turing. *ARM architecture The ARM CPU design is the microprocessor architecture ... "Annals of the History of Computing, Volume 5, Number 3, July 1983. p239, The Design of Colossus, THOMAS H. FLOWERS".. ...
The distance the tide moves the boat along this line is computed by the tidal speed, and this gives an "estimated position" or ... Ekman spiral. *Ekman transport. *El Niño-Southern Oscillation. *General circulation model. *Geochemical Ocean Sections Study ... "Formulation for observed and computed values of Deep Space Network data types for navigation" Archived 2004-10-16 at the ...
High-resolution computed tomography. *Spiral CT. *Ventilation/perfusion scan. Clinical prediction rule. *Pneumonia severity ...
Delayed X-rays, X-ray computed tomography (CT scan), or Magnetic resonance imaging (MRI) can confirm the diagnosis. ...
Well-preserved specimens yield details as small as 5 μm through X-ray computed tomography.[15] ... they stop flying horizontally and begin a descending spiral toward the safety of the ground, often preceded by an aerial loop ...
1) x-ray computed tomography (CT), magnetic resonance imaging (MRI), and ultrasound, which are used to image structures and ... The fiber tip is driven by the tube and has a current resonance frequency of 5 kHz which spirals in an expanding pattern of 250 ... spirals (500-pixel diameter image) at a frame rate of 15 Hertz. The 1.06 mm diameter distal tip houses the lens system, which ...
Spiral Computed Tomography for Acute Pulmonary Embolism. U. Joseph Schoepf, Samuel Z. Goldhaber, Philip Costello ... The negative predictive value of spiral computed tomography for the diagnosis of pulmonary embolism in patients with ... Performance of helical computed tomography in unselected outpatients with suspected pulmonary embolism. Ann Intern Med. 2001; ... Subsecond multi-slice computed tomography: basics and applications. Eur J Radiol. 1999; 31: 110-124. ...
multislice spiral computed tomography coronary angiography. Procedure: Multislice spiral computed tomography coronary ... Multislice Spiral Computed Tomography and Cardiomyopathy (CMD-scanner). This study has been completed. ... Accuracy of Multislice Spiral Computed Tomography in Diagnosis of Coronary Artery Disease Associated to Idiopathic ... The aim of this prospective study is to assess diagnostic accuracy of multislice spiral computed tomography coronary ...
Multislice Spiral Computed Tomography for In-Stent Restenosis. Maria Luigia Storto, Riccardo Marano, Nicola Maddestra, Marcello ... Multislice Spiral Computed Tomography for In-Stent Restenosis. Maria Luigia Storto, Riccardo Marano, Nicola Maddestra, Marcello ... Multislice Spiral Computed Tomography for In-Stent Restenosis. Maria Luigia Storto, Riccardo Marano, Nicola Maddestra, Marcello ... The patient underwent a computerized tomographic (CT) examination of the thorax with a multislice spiral CT scanner (MSCT) ( ...
Spiral computed tomography is comparable to angiography for the diagnosis of pulmonary embolism.. Baile EM1, King GG, Müller NL ... The use of spiral computed tomography (CT) for the diagnosis of pulmonary embolism has been compared to angiography, the ... After embolization spiral CT (3 mm and 1 mm collimation), and pulmonary angiography were performed. Pigs were killed and the ... Spiral CT and angiography were interpreted independently by two radiologists. Sensitivity and 95% confidence intervals for 3 mm ...
University Hospital is now offering a $99 spiral computed tomography (CT scans) of the chest in individuals who are at ... Hospital Markets $99 Spiral CT Scan, Claims It Could Save Your Life. Tweet ...
... Lancet. 1998 Apr 25;351(9111):1242-5. doi: ... All participants had a low-dose X-ray spiral computed tomography (CT) scan of the thorax; 3967 also underwent miniature ... We assessed whether population-based mass screening with a spiral computed tomography scanner could contribute substantially to ...
spiral computed tomography (Science: radiology) computed tomography in which the x-ray tube continuously revolves around the ... Retrieved from "https://www.biology-online.org/dictionary/index.php?title=Spiral_computed_tomography&oldid=38769" ...
The aim of this study was to evaluate the usefulness of annual screening for lung cancer by low-dose computed tomography (CT) ... Results of three-year mass screening programme for lung cancer using mobile low-dose spiral computed tomography scanner Br J ... The aim of this study was to evaluate the usefulness of annual screening for lung cancer by low-dose computed tomography (CT) ...
Radiation Dose From Computed Tomography Before and After Implementation of a High Pitch Dual Spiral Technique (FLASH). This ... Radiation Dose From Computed Tomography Before and After Implementation of a High Pitch Dual Spiral Technique. ... Computed tomography has emerged as the gold standard for the diagnosis of a broad range of medical diagnoses. For cardiac ... Patients who undergo cardiac CTA (computed tomography angiography) may be subjected to relatively high doses of ionizing ...
Spiral and Multislice Computed Tomography of the Body - Free epub, mobi, pdf ebooks download, ebook torrents download. ... 2013-05-07Spiral and Multislice Computed Tomography of the Body. * 2013-05-06Spiral and Multislice Computed Tomography of the ... 2012-06-22Spiral and Multislice Computed Tomography of the Body. * 2012-06-22Spiral and Multislice Computed Tomography of the ... 2011-09-03Spiral and Multislice Computed Tomography of the Body. * 2018-02-01[PDF] Applications of X-ray Computed Tomography in ...
The new spiral CT system promises to expedite the exam process, improve the image resolution and add to the range of diagnostic ... A $1.2 million state-of-the-art computed tomography (CT) scanner was recently added to the radiology department at Aventura ... The new spiral CT system promises to expedite the exam process, improve the image resolution and add to the range of diagnostic ...
We sought to determine the accuracy of multislice spiral computed tomography (MSCT) for assessing of aortic valve stenosis and ... PURPOSE: We sought to determine the accuracy of multislice spiral computed tomography (MSCT) for assessing of aortic valve ... Grading of aortic valve stenosis at 64-slice spiral computed tomography: comparison with transthoracic echocardiography and ...
Techniques for Enhanced Visualization of Pulmonary Vasculitis and Pulmonary Thrombosis by Multislice Spiral Computed Tomography ... Techniques for Enhanced Visualization of Pulmonary Vasculitis and Pulmonary Thrombosis by Multislice Spiral Computed Tomography ...
Looking for abbreviations of SCTAP? It is Spiral Computed Tomography Arterial Portography. Spiral Computed Tomography Arterial ... Spiral Computed Tomography Arterial Portography - How is Spiral Computed Tomography Arterial Portography abbreviated? https:// ... redirected from Spiral Computed Tomography Arterial Portography) Acronym. Definition. SCTAP. South Carolina Teacher Advancement ... spiral computed tomography. *spiral computed tomography. *spiral computed tomography. *Spiral Computed Tomography Arterial ...
Bianchi F, Hu J, Pelosi , et al Lung cancers detected by screening with spiral computed tomography have a malignant phenotype ... Is the Gene Expression Pattern of Lung Cancer Detected by Screening With Spiral Computed Tomography Different from That of ... Is the Gene Expression Pattern of Lung Cancer Detected by Screening With Spiral Computed Tomography Different from That of ... Is the Gene Expression Pattern of Lung Cancer Detected by Screening With Spiral Computed Tomography Different from That of ...
computed tomography. MSCT. multislice spiral computed tomography. QCA. quantitative coronary angiography. *Received December 18 ... Clinical research: magnetic resonance and computed tomographic imaging. Multislice spiral computed tomography coronary ... Volume-rendered multislice spiral computed tomography images (left)and corresponding conventional angiography images (right)of ... Multislice spiral computed tomography coronary angiography permits reliable detection of CAD in a population of patients in ...
Multi-slice spiral computed tomography perfusion imaging technology differentiates benign and malignant solitary pulmonary ... Aims: The present study is to investigate the value of multi-slice spiral computed tomography (MSCT) in the differentiation of ... Multi-slice spiral computed tomography, Perfusion imaging, Solitary pulmonary nodule, Hemodynamics.. Introduction. Solitary ... Multi-slice spiral computed tomography perfusion imaging technology differentiates benign and malignant solitary pulmonary ...
Spiral scanning is induced into synchrotron X-ray micro-CT (SR -CT) to resolve this problem. We investigate the effects of some ... The simulated results are confirmed by the synchrotron-based spiral micro-CT (SRS -CT) experiments performed at the Shanghai ... Effects of some factors on X-ray spiral micro-computed tomography at synchrotron radiation. Wang Yu-Dan, Peng Guan-Yun, Tong Ya ... Effects of some factors on X-ray spiral micro-computed tomography at synchrotron radiation. * * Wang Yu-Dan1 2, ...
A type of spiral computed tomography that employs multiple rows of detectors, each capable of producing a simultaneous image ( ... Multi-slice Spiral Computed Tomography. Known as: MULTI-SLICE SPIRAL CT A type of spiral computed tomography that employs ... Reliable noninvasive coronary angiography with fast submillimeter multislice spiral computed tomography.. *K. Nieman, Filippo ... BACKGROUND Multislice spiral computed tomography (MSCT) with retrospectively ECG-gated image reconstruction permits coronary… ( ...
Make research projects and school reports about Computed Tomography easy with credible articles from our FREE, online ... and pictures about Computed Tomography at Encyclopedia.com. ... Holbert, J. M. "Role of Spiral Computed Tomography in the ... Computed tomography. Definition. Computed tomography (CT), formerly referred to as computerized axial tomography (CAT), is a ... Computed tomography. Definition. Computed tomography scanning, also called CT scan, CAT scan, or computerized axial tomography ...
... Spiral and Multislice ... Spiral and Multislice Computed Tomography of the Body. Spiral and Multislice Computed Tomography of the Body. ... Spiral and Multislice Computed Tomography of the Body,. Multislice Computed Tomography of the Body. International Early Lung ... Spiral and Multislice Computed Tomography of the Body ( THIEME ) Mathias Prokop, Michael Galanski, Aart J. Van Der Molen, ...
... Spiral and Multislice ... Spiral and multislice computed tomography of the body. System in spiral and multislice computed tomography of the body. Spiral ... Spiral and Multidetector Spiral Computed Tomography of the Body. Galanski, Spiral and Multislice Computed Tomography of the ... Download Spiral and Multislice Computed Tomography of the Body ( THIEME ). Spiral and Multislice Computed Tomography of the ...
Objectives We evaluated the potential of prospectively ECG-triggered high-pitch spiral acquisition with low tube voltage and ... visualization by electron-beam tomography and retrospectively electrocardiogram-gated multislice spiral computed tomography. ... Blankstein R, Bolen MA, Pale R et al (2011) Use of 100 kV versus 120 kV in cardiac dual source computed tomography: effect on ... Chow BJ, Wells GA, Chen L et al (2010) Prognostic value of 64-slice cardiac computed tomography severity of coronary artery ...
PCT International Patent Application - PCT/US14/10307. Your Reference - MGH 21518.03. Priority Claim(s): 61/749,151 filed 04 Jan 2013. Q&B Reference - 125141.00792. Title: SYSTEM AND METHOD FOR ULTRA-HIGH RESOLUTION TOMOGRAPHIC IMAGING. ...
Whole body computed tomography has developed at a rapid pace in the past decade, spurred on by the introduction of spiral and ... with special emphasis on the role of spiral and multi-slice CT. ... Spiral and Multislice Computed Tomography of the Body. ...
Clinical value of technetium-99m-HMPAO-labeled leukocyte scintigraphy and spiral computed tomography in active Crohns disease. ... Clinical value of technetium-99m-HMPAO-labeled leukocyte scintigraphy and spiral computed tomography in active Crohns disease ... T1 - Clinical value of technetium-99m-HMPAO-labeled leukocyte scintigraphy and spiral computed tomography in active Crohns ... Clinical value of technetium-99m-HMPAO-labeled leukocyte scintigraphy and spiral computed tomography in active Crohns disease ...
Spiral imaging heralds the resurgence of computed tomography (CT). This article was originally published in Clinica ... Computed tomography has faced stiff competition in recent years from new imaging modalities but it could regain an edge through ... Since its introduction in 1989, spiral CT has gained wide clinical acceptance and its advantages, which include speed, 3-D ...
We used a cDNA microarray platform and compared the gene expression profile of spiral CT-detected lung carcinomas with a ... Spiral computed tomography (CT) can detect lung cancer at an early stage, but the malignant potential is unknown. The question ... Tomography, Spiral Computed, Tomography, X-Ray Computed ... PURPOSE: Spiral computed tomography (CT) can detect lung cancer ... Lung cancers detected by screening with spiral computed tomography have a malignant phenotype when analyzed by cDNA microarray. ...
Spiral CT, Electron Beam Tomography) And By End-Users/Application (Pharmaceutical Industries, Research and Development) Global ... Global Spectral Computed Tomography (CT) Market By Product Type ( ... Global Spectral Computed Tomography (CT) Market By Product Type ... Chapter 1 Industry Overview 1.1 Spectral Computed Tomography (CT) Market Overview 1.1.1 Spectral Computed Tomography (CT) ... 1.2.1 North America Spectral Computed Tomography (CT) Market Status and Outlook 1.2.2 EU Spectral Computed Tomography (CT) ...
CHEN, Yimei et al. Localization of the Nerve Entry Points of Thigh Adductor Muscles by Spiral Computed Tomography: A Novel ... Palabras clave : Nerve entry points; Localization; Thigh adductor muscles; Spasticity; Spiral computed tomography. ... aim of this study was to identify the location and depth of the NEPs of thigh adductor muscles by spiral computed tomography ( ... were determined by spiral CT. Projection of NEP in the opposite direction was designated as P. The percentage location of the ...
  • Computed tomography, also called CT scan, CAT scan, or computerized axial tomography, is a combination of focused x-ray beams and the computerized production of an image. (encyclopedia.com)
  • Role of Spiral Computed Tomography Scan in Evaluation of Retroperitoneal Pathologies. (bvsalud.org)
  • The study role of Spiral Computed Tomography Scan in evaluation of Retroperitoneal Pathologies was done in 50 patients with clinically suspected retroperitoneal mass in the Department of Radiodiagnosis and Imaging of Govt. (bvsalud.org)
  • Computed tomography (CT), was originally known as "EMI scan" as it was developed at a research branch of EMI, a company best known today for its music and recording business. (bionity.com)
  • It was later known as computed axial tomography (CAT or CT scan) and body section roentgenography . (bionity.com)
  • Also called spiral CT scan. (cancer.gov)
  • In this open prospective study, 6 well controlled asthmatic patients will undergo a high-resolution multi-slice computed tomography (CT) scan, lung function tests and a SPECT scan to obtai. (bioportfolio.com)
  • A 3 mm spiral scan, reconstructed at 1.5 mm intervals, was undertaken on a Hi Speed Advantage scanner (General Electric Medical Systems, Milwaukee, Wisconsin, USA) using 150 ml of contrast (200 mg I/ml) at 4 ml/s. (bmj.com)
  • In the NLST, the low-dose spiral CT scan identified more tumors at early stages, when they are more easily treated. (mdanderson.org)
  • While the first-generation devices took several minutes for a tomography scan, the current scanners only take fractions of a section. (doccheck.com)
  • Doctors use a computed tomography (CT) scan, also called a CAT scan, to find cancer. (cancer.net)
  • A computed tomography (CT) scan of the knee is a test that uses x-rays to take detailed images of the knee. (ucsfhealth.org)
  • The only recommended screening test for lung cancer is low-dose computed tomography (also called a low-dose CT scan). (reference.com)
  • For a price, many Americans-without a physician referral-can now conveniently purchase a computed tomography (CT) scan or an ultrasound examination from private, stand-alone radiology corporations. (jabfm.org)
  • If imaging is deemed necessary from an initial clinical evaluation such as d -dimer testing, options include nuclear medicine scanning, catheter pulmonary angiography, and spiral CT. (ahajournals.org)
  • The aim of this prospective study is to assess diagnostic accuracy of multislice spiral computed tomography coronary angiography in patients with idiopathic cardiomyopathy in sinus rhythm, compared to conventional coronary angiography. (clinicaltrials.gov)
  • The principal aim of this study is to assess the diagnostic accuracy (sensitivity, specificity, predictive values) of multislice spiral computed tomography (MSCT) coronary angiography among patients having idiopathic hypokinetic dilated cardiomyopathy in sinus rhythm, compared to conventional coronary angiography. (clinicaltrials.gov)
  • Spiral computed tomography is comparable to angiography for the diagnosis of pulmonary embolism. (nih.gov)
  • The use of spiral computed tomography (CT) for the diagnosis of pulmonary embolism has been compared to angiography, the current gold standard. (nih.gov)
  • The aim of this study was to compare contrast-enhanced spiral CT to pulmonary angiography for the detection of subsegmental-sized pulmonary emboli by using a methacrylate cast of porcine pulmonary vessels as an independent gold standard. (nih.gov)
  • After embolization spiral CT (3 mm and 1 mm collimation), and pulmonary angiography were performed. (nih.gov)
  • Spiral CT and angiography were interpreted independently by two radiologists. (nih.gov)
  • There was no difference between spiral CT and angiography for detection of subsegmental-sized pulmonary emboli. (nih.gov)
  • We conclude that spiral CT is comparable to angiography for detection of pulmonary emboli. (nih.gov)
  • Patients who undergo cardiac CTA (computed tomography angiography) may be subjected to relatively high doses of ionizing radiation (ie. (clinicaltrials.gov)
  • Objectives This study was designed to prospectively evaluate the diagnostic performance of multislice spiral computed tomography (MSCT) coronary angiography for the detection of significant lesions in all segments of the coronary tree potentially suitable for revascularization. (onlinejacc.org)
  • Multislice spiral computed tomography (MSCT) coronary angiography is a promising noninvasive technique for the detection of obstructive epicardial coronary artery disease (CAD), and 16-row MSCT scanners have the potential to further improve its diagnostic performance (1) . (onlinejacc.org)
  • Diagnostic performance of multislice spiral computed tomography of coronary arteries as compared with conventional invasive coronary angiography: a meta-analysis. (semanticscholar.org)
  • Reliable noninvasive coronary angiography with fast submillimeter multislice spiral computed tomography. (semanticscholar.org)
  • Non-invasive coronary angiography with multislice spiral computed tomography: impact of heart rate. (semanticscholar.org)
  • The introduction of CT scanning, especially spiral CT, has helped reduce the need for more invasive procedures such as cerebral angiography. (encyclopedia.com)
  • We evaluated the potential of prospectively ECG-triggered high-pitch spiral acquisition with low tube voltage and current in combination with iterative reconstruction to achieve coronary CT angiography with sufficient image quality at an effective dose below 0.1 mSv. (springer.com)
  • Achenbach S, Goroll T, Seltmann M et al (2011) Detection of coronary artery stenoses by low dose, prospectively ECG-triggered, high-pitch spiral coronary CT angiography. (springer.com)
  • Budoff MJ, Dowe D, Jollis JG et al (2008) Diagnostic performance of 64-multidetector row coronary computed tomographic angiography for evaluation of coronary artery stenosis in individuals without known coronary artery disease: results from the prospective multicenter ACCURACY (Assessment by Coronary Computed Tomographic Angiography of Individuals Undergoing Invasive Coronary Angiography) trial. (springer.com)
  • van Velzen JE, Schuijf JD, de Graaf FR et al (2011) Diagnostic performance of non-invasive multidetector computed tomography coronary angiography to detect coronary artery disease using different endpoints: detection of significant stenosis vs. detection of atherosclerosis. (springer.com)
  • Cardiac multislice spiral computed tomography as an alternative to coronary angiography in the preoperative assessment of coronary artery disease before aortic valve surgery: a management outcome study. (univ-brest.fr)
  • Preliminary studies suggest that multislice spiral computed tomography coronary angiography (MSCT-CA) can be used to rule out coronary artery disease (CAD). (univ-brest.fr)
  • Utility of Preoperative Multidetector-row Computed Tomography Angiography after Sublingual Nitroglycerin with Three-dimensional Reconstruction in Planning of the Anterolateral Thigh Flap. (bioportfolio.com)
  • Here, we studied the utility of preoperative computed tomography angiography after sublingual. (bioportfolio.com)
  • Computed Tomography Angiography Combined With Knowledge-Based Iterative Algorithm for Transcatheter Aortic Valve Implantation Planning: Image Quality and Radiation Dose Exposure With Low-kV and Low-Contrast-Medium Protocol. (bioportfolio.com)
  • Dynamic Stress Computed Tomography Perfusion With a Whole-Heart Coverage Scanner in Addition to Coronary Computed Tomography Angiography and Fractional Flow Reserve Computed Tomography Derived. (bioportfolio.com)
  • CT pulmonary angiogram (CTPA) is a medical diagnostic test that employs computed tomography (CT) angiography to obtain an image of the pulmonary arteries. (wikipedia.org)
  • Alternative methods of scanning include x-ray computed tomography (CT), magnetic resonance imaging (MRI) and functional magnetic resonance imaging (fMRI), ultrasound and single-photon emission computed tomography (SPECT). (wikipedia.org)
  • The patient underwent a computerized tomographic (CT) examination of the thorax with a multislice spiral CT scanner (MSCT) (Somatom Volume Zoom, Siemens). (ahajournals.org)
  • PURPOSE: We sought to determine the accuracy of multislice spiral computed tomography (MSCT) for assessing of aortic valve stenosis and to establish threshold values of the planimetric aortic valve orifice area (AVA) that best separate between different grades of stenosis severity. (biomedsearch.com)
  • The present study is to investigate the value of multi-slice spiral computed tomography (MSCT) in the differentiation of benign and malignant solitary pulmonary nodule (SPN). (alliedacademies.org)
  • As the development of imaging examination technology, multi-slice spiral computed tomography (MSCT) perfusion imaging has been widely used in clinical practice [ 6 ]. (alliedacademies.org)
  • Multislice spiral computed tomography (MSCT) playsa vital role in the diagnosis of bronchial foreign bodies in children. (amegroups.com)
  • Helical computed tomography also creates more detailed pictures and may be better at finding small abnormal areas inside the body. (cancer.gov)
  • Written by Peter Dawson, a well-respected figure in computed tomography and radiology, and a world expert on contrast agents, Scanning Protocols for Multislice Helical Computed Tomography is an essential guide for all those working with CT, as well as those in training. (routledge.com)
  • The report provides rational insights along with historical and forecast data to aid in better understanding of the Global Emission Computed Tomography System Market. (mysmartrend.com)
  • The report provides a comprehensive analysis of key factors that are expected to drive the growth of the Emission Computed Tomography System market. (mysmartrend.com)
  • This analysis sheds light in the current trends and opportunities in the global Emission Computed Tomography System market. (mysmartrend.com)
  • The report provides a basic overview of the Emission Computed Tomography System industry including its definition, applications, and manufacturing technology. (mysmartrend.com)
  • Through the statistical analysis, the study depicts the global market for Emission Computed Tomography System including capacity, production, production value, cost/profit, and supply/demand from an international perspective. (mysmartrend.com)
  • The report then estimates the market development and trends of the Emission Computed Tomography System industry up to 2026. (mysmartrend.com)
  • The report hints at crucial information associated with new market developments being undertaken in the Emission Computed Tomography System industry before evaluating its feasibility. (mysmartrend.com)
  • Anatomical evaluation of the craniovertebral junction on cone-beam computed tomography images. (bioportfolio.com)
  • The primary aim of this study is to investigate the use of cone beam computed tomography (CBCT) for breast imaging in the diagnostic setting by providing a compelling body of evidence inco. (bioportfolio.com)
  • Abstract Global Spectral Computed Tomography (CT) Market is accounted for xx USD million in 2019 and is expected to reach xx USD million by 2026 growing at a CAGR of xx% during the forecast period. (apexmarketreports.com)
  • The report offers in-depth insights, revenue details, and other vital information regarding the global Spectral Computed Tomography (CT) market and the various trends, drivers, restraints, opportunities, and threats in the target market till 2026. (apexmarketreports.com)
  • Geographically, America continues to dominate the global spectral computed tomography market owing to presence of huge patients suffering from the cardiovascular diseases, cancer and orthopedic diseases. (reportsnreports.com)
  • The global Spectral Computed Tomography (CT) market is valued at xx million US$ in 2017 and will reach xx million US$ by the end of 2025, growing at a CAGR of xx% during 2018-2025. (reportsnreports.com)
  • This research report categorizes the global Spectral Computed Tomography (CT) market by top players/brands, region, type and end user. (reportsnreports.com)
  • To study and analyze the global Spectral Computed Tomography (CT) market size (value & volume) by company, key regions, products and end user, breakdown data from 2013 to 2017, and forecast to 2025. (reportsnreports.com)
  • Focuses on the key global Spectral Computed Tomography (CT) companies, to define, describe and analyze the sales volume, value, market share, market competition landscape and recent development. (reportsnreports.com)
  • Grading of aortic valve stenosis at 64-slice spiral computed tomography: comparison with transthoracic echocardiography and calibration against cardiac catheterization. (biomedsearch.com)
  • Chow BJ, Wells GA, Chen L et al (2010) Prognostic value of 64-slice cardiac computed tomography severity of coronary artery disease, coronary atherosclerosis, and left ventricular ejection fraction. (springer.com)
  • the cardiac acquisition data is obtained from a computed tomography medical imaging system. (google.es)
  • Myocardial perfusion imaging using adenosine triphosphate stress multi-slice spiral computed tomography: alternative to stress myocardial perfusion scintigraphy. (semanticscholar.org)
  • Spiral and Multislice Computed Tomography of the Body ( THIEME ) by Mathias Prokop, Michael Galanski, Aart J. Prokop M., Galanski M. (comunidades.net)
  • 2002. Prokop M, Galanski M (2003) Spiral and multislice computed tomography of the body. (comunidades.net)
  • Radiologie Georg Thieme Verlag, Stuttgart, Prokop M. Spiral and multislice computed tomography of the body. (comunidades.net)
  • Van der Molen A (2002) Spiral and multislice computed tomography of the body. (comunidades.net)
  • A $1.2 million state-of-the-art computed tomography (CT) scanner was recently added to the radiology department at Aventura Hospital and Medical Center. (aventurahospital.com)
  • To compare high-frequency transabdominal ultrasonography (USG) and spiral computed tomography (CT) with colonoscopy in diagnosis of colon cancer. (medresearch.in)
  • University Hospital is now offering a $99 spiral computed tomography (CT scans) of the chest in individuals who are at increased risk of developing lung cancer. (getbetterhealth.com)
  • Computed tomography (CT) scans are completed with the use of a 360-degree x-ray beam and computer production of images. (thefreedictionary.com)
  • The x-ray machine scans the body in a spiral path. (cancer.gov)
  • This document addresses the use of various computed tomography (CT) scanning modalities when used to perform whole body scans for general screening. (unicare.com)
  • Scans often used in diagnosing, staging, and monitoring breast cancer include liver scans, bone scans, and computed tomography (CT) or computerized axial tomography (CAT) scans, positron emission tomograhy (PET) scans and magnetic resonance imaging (MRI) scans. (lbbc.org)
  • 5. The method of performing virtual examination according to claim 4 , wherein the scans are computed tomography scans. (google.com)
  • Without a physician referral, patients can now directly purchase screening computed tomography (CT) or ultrasound scans. (jabfm.org)
  • Objectives The aim of our study was to evaluate the diagnostic accuracy of 16-multi-detector spiral computed tomography (MDCT) with 188 ms temporal resolution. (onlinejacc.org)
  • Since 1999, mechanical multi-detector spiral computed tomography (MDCT) systems have been available for a noninvasive detection of coronary artery disease (CAD). (onlinejacc.org)
  • To evaluate the additional value of FDG-PET as a staging modality, complementary to routine multidetector row computed tomography (MDCT) in patients with CRC. (bmj.com)
  • The best results are obtained using multidetector computed tomography (MDCT) scanners. (wikipedia.org)
  • Computed Tomography (CT) imaging is also known as "CAT scanning"(Computed Axial Tomography). (avmi.net)
  • Computed tomography (CT) scanning - also known as computed axial tomography (CAT) scanning - is a medical diagnostic technique in which a computer combines the results of X-rays passed through the body at different angles to produce cross-sectional images ("slices") of the tissue being examined. (daviddarling.info)
  • However, limitations for the accurate diagnosis of small peripheral emboli, with a reported miss rate of up to 30% with single-slice spiral CT so far, have prevented the unanimous embrace of spiral CT as the new standard of reference for imaging pulmonary embolism. (ahajournals.org)
  • Computed tomography has emerged as the 'gold standard' for the diagnosis of a broad range of medical diagnoses. (clinicaltrials.gov)
  • The use of computed tomography for the diagnosis of pulmonary embolism was first described in 1980 but a definite diagnosis was usually limited to large central artery branches. (pneumon.org)
  • In many institutions, spiral CT is becoming established as the first-line imaging test in daily clinical practice. (ahajournals.org)
  • Noninvasive detection of coronary lesions using 16-detector multislice spiral computed tomography technology: initial clinical results. (semanticscholar.org)
  • Since its introduction in 1989, spiral CT has gained wide clinical acceptance and its advantages, which include speed, 3-D spatial resolution and lower X-ray dose, are being proved in a number of applications, according to researchers at the Rontgen Centenary congress. (informa.com)
  • The aim of this paper is to show the direct and indirect spiral computed tomography findings of pulmonary embolism, computed tomography protocols that we use in our hospital, and to present clinical and CT findings of 12 cases with suspected pulmonary embolism. (pneumon.org)
  • The majority of Computed Tomography (CT) detected lung cancers are adenocarcinoma (AC), representing lesions with variable tissue invasion, aggressiveness and clinical outcome. (bioportfolio.com)
  • In contrast, eight (9.3 percent) of the patients with a normal d -dimer test and high clinical probability were diagnosed with VTE, of whom all but one were diagnosed at baseline via spiral CT. (aafp.org)
  • Retrospective gated CT examinations on the 64 slice and dual source Definition Siemens CT scanners) with the radiation exposure using the newest generation CT scanner (high pitch dual source spiral technique). (clinicaltrials.gov)
  • The basic information such as the definition of the Computed Tomography System market, prevalent Computed Tomography System industry chain, and the government regulations pertaining to the Computed Tomography System market are also discussed in the report. (beforeitsnews.com)
  • Mailed questionnaires assessed the physicians' knowledge of lung cancer screening guidelines, beliefs about the effectiveness of screening tests, and ordering of screening chest radiograph, low-dose spiral computed tomography, or sputum cytology in the past 12 months. (annfammed.org)
  • 55% had ordered chest radiograph, 22% low-dose spiral computed tomography, and less than 5% sputum cytology. (annfammed.org)
  • 10 A second large, randomized controlled trial comparing low-dose spiral computed tomography (LDCT) vs chest radiograph in current and former heavy cigarette smokers, the National Lung Screening Trial (NLST), was halted in October 2010 after observation of a 20% reduction in lung cancer mortality in the LDCT group. (annfammed.org)
  • RATIONALE: Diagnostic procedures, such as positron emission tomography and computed tomography, may help learn the extent of disease and allow doctors to plan 3-dimensional conformal radia. (bioportfolio.com)
  • This phase II trial studies how well positron emission tomography (PET)/computed tomography (CT) and single positron emission computed tomography (SPECT)/CT imaging works in improving radi. (bioportfolio.com)
  • The role of positron emission tomography with the glucose analogue [18F] fluoro-2-deoxy-D-glucose (FDG-PET) in the initial staging of disease in patients with primary colorectal cancer (CRC) has not been adequately assessed. (bmj.com)
  • Positron-emission tomography ( PET ) [1] is a nuclear medicine functional imaging technique that is used to observe metabolic processes in the body. (wikipedia.org)
  • This book expertly fills a gap in the literature by presenting the state-of-the-art capabilities and requirements of CT as a key diagnostic and interventional tool, with special emphasis on the role of spiral CT. (ebookee.org)
  • The new spiral CT system promises to expedite the exam process, improve the image resolution and add to the range of diagnostic imaging procedures offered at the hospital. (aventurahospital.com)
  • Computed tomography (CT) scanning is a valuable diagnostic tool that provides physicians with views of internal body structures. (encyclopedia.com)
  • The book presents the state-of-the-art capabilities and requirements of CT as a key diagnostic and interventional tool, with special emphasis on the role of spiral and multi-slice CT. (downmedbook.com)
  • Spiral computed tomography and the new protocols have established a very important diagnostic technique for suspected pulmonary embolism. (pneumon.org)
  • Spiral/helical CT with the development of 64-multislice variant has revolutionized diagnostic imaging: image acquistion of large body volumes are obtained in short times during a single-breath hold. (routledge.com)
  • To compare the diagnostic performance and time efficiency of Computer-Aided Detection (CAD) assisted reading for the identification of pulmonary nodules in chest Computed Tomography (CT) f. (bioportfolio.com)
  • Remaining concerns about the accuracy of spiral CT for pulmonary embolism detection may be overcome by the introduction of multidetector-row spiral CT. (ahajournals.org)
  • The most recent generation of multidetector-row spiral CT scanners appears to outperform competing imaging modalities for the accurate detection of central and peripheral pulmonary embolism. (ahajournals.org)
  • We assessed whether population-based mass screening with a spiral computed tomography scanner could contribute substantially to detection of smaller cancers, and decrease mortality. (nih.gov)
  • Detection of coronary artery stenoses by contrast-enhanced, retrospectively electrocardiographically-gated, multislice spiral computed tomography. (semanticscholar.org)
  • A supervised method is presented for the detection and segmentation of ribs in computed tomography (ct) data. (comunidades.net)
  • EUS is superior to single-slice spiral CT and should replace the latter for preoperative detection of pancreatic insulinomas. (medscape.com)
  • The aim of the present study is to identify in a population of heavy smokers, recruited in prospective screening trials with annual spiral computed tomography (CT), those individuals with higher lung cancer risk on the basis of functional damage, and to establish whether a cut-off value of lung obstruction can be assumed as a discriminating parameter for early detection lung cancer trials. (ersjournals.com)
  • In the MILD trial, individuals were randomised in two groups: a control group which underwent a programme of primary prevention with pulmonary function test evaluation and blood sample collection, and an early detection group where periodic spiral CT is performed with primary prevention, pulmonary function evaluation and blood sample collection. (ersjournals.com)
  • Evidence is accumulating that it is safe practice to withhold anticoagulation in patients with suspected pulmonary embolism on the basis of a negative spiral CT study. (ahajournals.org)
  • 0.1 mSv may provide sufficient image quality in selected patients through the combination of high-pitch spiral acquisition and raw data-based iterative reconstruction. (springer.com)
  • EXPERIMENTAL DESIGN: We used a cDNA microarray platform and compared the gene expression profile of spiral CT-detected lung carcinomas with a matched case-control population of patients presenting with symptomatic lung cancer. (ox.ac.uk)
  • Quantitative computed tomography (QCT) can help us to study morphological alterations in patients with PH. (bioportfolio.com)
  • All other patients were further evaluated with spiral computed tomography (CT). (aafp.org)
  • Assessment of myocardial viability in reperfused acute myocardial infarction using 16-slice computed tomography in comparison to magnetic resonance imaging. (semanticscholar.org)
  • Recent studies have shown noncontrast computed tomography (NCT) to be more effective than ultrasound (US) for imaging acute ureterolithiasis. (scielo.br)
  • The computed tomographic (CT) pulmonary angiogram appearances of acute right ventricular dysfunction due to massive pulmonary embolus in a patient are described. (bmj.com)
  • Acute iliofemoral deep vein thrombosis: evaluation of underlying anatomic abnormalities by spiral CT venography. (semanticscholar.org)
  • 5 , 13 Computed tomography show the acute enlargement of dissected aorta of almost 25% from its baseline. (springer.com)
  • One such scanner, the dual source CT, is a new high pitch dual source spiral technique that offers the ability to image a patient's chest with ECG gated imaging protocols within a single second. (clinicaltrials.gov)
  • Computed tomography has faced stiff competition in recent years from new imaging modalities but it could regain an edge through spiral CT. (informa.com)
  • It is a medical imaging method employing tomography where digital geometry processing is used to generate a three-dimensional image of the internals of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation. (bionity.com)
  • The x-ray device is particularly useful for two-dimensional multi-planar x-ray imaging and/or three-dimensional computed tomography (CT) imaging applications. (google.co.uk)
  • Despite the expected decline in the mid-1970s in the use of computed tomography (CT) following the excitement of magnetic resonance imaging (MRI), CT has confounded its detractors and remains the imaging modality of choice, particularly for the chest and abdomen. (routledge.com)
  • An imaging technique using a device which combines TOMOGRAPHY, EMISSION-COMPUTED, SINGLE-PHOTON and TOMOGRAPHY, X-RAY COMPUTED in the same session. (bioportfolio.com)
  • Use of Computed Tomography and Magnetic Resonance Imaging in Central Venous Disease. (semanticscholar.org)
  • Coronary Imaging with Multislice Spiral Computed Tomography. (buecher.de)
  • Computed tomography (CT) has a prominent place in the medical imaging. (reportsnreports.com)
  • Computed tomography , in short CT , is an X-ray method with which the human body is represented in cross-sectional images ( sectional imaging technique ). (doccheck.com)
  • The spine was then scanned using computed tomography (CT), with 3D reconstructions of each bone made from the digital model. (eurekalert.org)
  • The aim of this study was to evaluate the usefulness of annual screening for lung cancer by low-dose computed tomography (CT) and the characteristics of identified lung cancers. (nih.gov)
  • Revised edition of: Computed tomography and magnetic resonance of the thorax / David P. Naidich, Elias A. Zerhouni, Stanley S. Siegelman. (worldcat.org)
  • his Hirsch-index is cited with a 69 (ISI-Web of Knowledge, 2018) Twelve out of 286 original scientific papers: [1] Kalender WA, Klotz E, Süß C. An integral approach to vertebral bone mineral analysis by X-ray computed tomography. (wikipedia.org)
  • This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures. (bioportfolio.com)
  • Tomography has been one of the pillars of radiologic diagnostics until the early 80's, when the advent of computer and of the circular methodic, this last due to Godfrey Newbold Hounsfield and Allan McLeod Cormack , gradually supplanted it in favour of CT. (bionity.com)
  • A type of spiral computed tomography that employs multiple rows of detectors, each capable of producing a simultaneous image (slice). (semanticscholar.org)
  • Worldwide Computed Tomography System Market 2022, presents critical information and factual data about the Computed Tomography System market globally, providing an overall statistical study of the Computed Tomography System market on the basis of market drivers, Computed Tomography System Market limitations, and its future prospects. (beforeitsnews.com)
  • Global Computed Tomography System Market 2022 report has Forecasted Compound Annual Growth Rate (CAGR) in % value for particular period for Computed Tomography System market, that will help user to take decision based on futuristic chart. (beforeitsnews.com)
  • In this report, the global Computed Tomography market is valued at USD XX million in 2016 and is expected to reach USD XX million by the end of 2022, growing at a CAGR of XX% between 2016 and 2022. (reportsnreports.com)
  • Lung cancers detected by screening with spiral computed tomography have a malignant phenotype when analyzed by cDNA microarray. (ox.ac.uk)
  • The purpose of this study is to compare the radiation exposure of a variety of chest CT examinations performed on the current state of the art CT scanners (64 slice, dual source CT scanner) with the radiation exposure for identical chest CT examinations performed on the Siemens Flash CT scanner (high pitch dual source spiral technique). (clinicaltrials.gov)
  • These spiral CT scanners can now image entire anatomic regions like the lungs in a quick 20 to 30 second breath hold. (avmi.net)
  • New "multi-slice" spiral CT scanners can collect multiple slices of data during spiral CT mode and rotate at faster speeds. (avmi.net)
  • Modern "spiral" scanners can perform the exam in one continuous motion. (daviddarling.info)
  • Modern "spiral" scanners can perform the exam without stopping. (ucsfhealth.org)