Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
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.
Imaging methods that result in sharp images of objects located on a chosen plane and blurred images located above or below the plane.
Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
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 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 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 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)
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.
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.
Self-generated faint acoustic signals from the inner ear (COCHLEA) without external stimulation. These faint signals can be recorded in the EAR CANAL and are indications of active OUTER AUDITORY HAIR CELLS. Spontaneous otoacoustic emissions are found in all classes of land vertebrates.
Tomography using x-ray transmission.
Unstable isotopes of fluorine that decay or disintegrate emitting radiation. F atoms with atomic weights 17, 18, and 20-22 are radioactive fluorine isotopes.
Gases, fumes, vapors, and odors escaping from the cylinders of a gasoline or diesel internal-combustion engine. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Random House Unabridged Dictionary, 2d ed)
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.
Compounds that are used in medicine as sources of radiation for radiotherapy and for diagnostic purposes. They have numerous uses in research and industry. (Martindale, The Extra Pharmacopoeia, 30th ed, p1161)
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.
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)
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.
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.
Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.
The 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.
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.
Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes.
Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
The effect of GLOBAL WARMING and the resulting increase in world temperatures. The predicted health effects of such long-term climatic change include increased incidence of respiratory, water-borne, and vector-borne diseases.
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.
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.
Measurement of the intensity and quality of fluorescence.
The circulation of blood through the BLOOD VESSELS of the BRAIN.
X-RAY COMPUTERIZED TOMOGRAPHY with resolution in the micrometer range.
Computer systems or networks designed to provide radiographic interpretive information.
A measure of the total greenhouse gas emissions produced by an individual, organization, event, or product. It is measured in units of equivalent kilograms of CARBON DIOXIDE generated in a given time frame.
Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents.
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.
Elements of limited time intervals, contributing to particular results or situations.
Any substance in the air which could, if present in high enough concentration, harm humans, animals, vegetation or material. Substances include GASES; PARTICULATE MATTER; and volatile ORGANIC CHEMICALS.
Unstable isotopes of thallium that decay or disintegrate emitting radiation. Tl atoms with atomic weights 198-202, 204, and 206-210 are thallium radioisotopes.
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.
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.
The simplest saturated hydrocarbon. It is a colorless, flammable gas, slightly soluble in water. It is one of the chief constituents of natural gas and is formed in the decomposition of organic matter. (Grant & Hackh's Chemical Dictionary, 5th ed)
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
Three-dimensional computed tomographic imaging with the added dimension of time, to follow motion during imaging.
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.
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.
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)
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.
A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.
A substituted benzamide that has antipsychotic properties. It is a dopamine D2 receptor (see RECEPTORS, DOPAMINE D2) antagonist.
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
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.
Radiographic visualization of the body between the thorax and the pelvis, i.e., within the peritoneal cavity.
The gaseous envelope surrounding a planet or similar body. (From Random House Unabridged Dictionary, 2d ed)
Substances used to allow enhanced visualization of tissues.
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.
Methods of creating machines and devices.
Pathologic deposition of calcium salts in tissues.
A phase transition from liquid state to gas state, which is affected by Raoult's law. It can be accomplished by fractional distillation.
Five-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives.
The property of emitting radiation while being irradiated. The radiation emitted is usually of longer wavelength than that incident or absorbed, e.g., a substance can be irradiated with invisible radiation and emit visible light. X-ray fluorescence is used in diagnosis.
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.
2-Deoxy-D-arabino-hexose. An antimetabolite of glucose with antiviral activity.
Compounds that contain the radical R2C=N.OH derived from condensation of ALDEHYDES or KETONES with HYDROXYLAMINE. Members of this group are CHOLINESTERASE REACTIVATORS.
A gamma-emitting RADIONUCLIDE IMAGING agent used in the evaluation of regional cerebral blood flow and in non-invasive dynamic biodistribution studies and MYOCARDIAL PERFUSION IMAGING. It has also been used to label leukocytes in the investigation of INFLAMMATORY BOWEL DISEASES.
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)
Pathological processes of CORONARY ARTERIES that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.
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.
Agents that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.
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).
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.
The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment.
Tumors or cancer of the LUNG.
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).
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)
LIGHT, it's processes and properties, and the characteristics of materials interacting with it.
Unstable isotopes of iodine that decay or disintegrate emitting radiation. I atoms with atomic weights 117-139, except I 127, are radioactive iodine isotopes.
Discrete concentrations of energy, apparently massless elementary particles, that move at the speed of light. They are the unit or quantum of electromagnetic radiation. Photons are emitted when electrons move from one energy state to another. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Emission of LIGHT when ELECTRONS return to the electronic ground state from an excited state and lose the energy as PHOTONS. It is sometimes called cool light in contrast to INCANDESCENCE. LUMINESCENT MEASUREMENTS take advantage of this type of light emitted from LUMINESCENT AGENTS.
Volative flammable fuel (liquid hydrocarbons) derived from crude petroleum by processes such as distillation reforming, polymerization, etc.
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.
The spectrometric analysis of fluorescent X-RAYS, i.e. X-rays emitted after bombarding matter with high energy particles such as PROTONS; ELECTRONS; or higher energy X-rays. Identification of ELEMENTS by this technique is based on the specific type of X-rays that are emitted which are characteristic of the specific elements in the material being analyzed. The characteristic X-rays are distinguished and/or quantified by either wavelength dispersive or energy dispersive methods.
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.
Any combustible hydrocarbon deposit formed from the remains of prehistoric organisms. Examples are petroleum, coal, and natural gas.
The hollow, muscular organ that maintains the circulation of the blood.
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.
Studies to determine the advantages or disadvantages, practicability, or capability of accomplishing a projected plan, study, or project.
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.
The circulation of blood through the CORONARY VESSELS of the HEART.
Techniques used for determining the values of photometric parameters of light resulting from LUMINESCENCE.
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.
Methods which attempt to express in replicable terms the extent of the neoplasm in the patient.
A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
An amphetamine analog that is rapidly taken up by the lungs and from there redistributed primarily to the brain and liver. It is used in brain radionuclide scanning with I-123.
Behavior of LIGHT and its interactions with itself and materials.
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.
Units that convert some other form of energy into electrical energy.
Organic compounds that have a relatively high VAPOR PRESSURE at room temperature.
A natural fuel formed by partial decomposition of vegetable matter under certain environmental conditions.
Nitrogen oxide (N2O). A colorless, odorless gas that is used as an anesthetic and analgesic. High concentrations cause a narcotic effect and may replace oxygen, causing death by asphyxia. It is also used as a food aerosol in the preparation of whipping cream.
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.
Nitrate reduction process generally mediated by anaerobic bacteria by which nitrogen available to plants is converted to a gaseous form and lost from the soil or water column. It is a part of the nitrogen cycle.
Radiography of the bronchial tree after injection of a contrast medium.
Tomography using single-photon emitting RADIONUCLIDES to create images that are captured in times corresponding to various points in the cardiac cycle.
The vapor state of matter; nonelastic fluids in which the molecules are in free movement and their mean positions far apart. Gases tend to expand indefinitely, to diffuse and mix readily with other gases, to have definite relations of volume, temperature, and pressure, and to condense or liquefy at low temperatures or under sufficient pressure. (Grant & Hackh's Chemical Dictionary, 5th ed)
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 first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, atomic number 43, and atomic weight 98.91. All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99, has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent. Technetium 99 which is a decay product of technetium 99m, has a half-life of 210,000 years.
A heavy, bluish white metal, atomic number 81, atomic weight [204.382; 204.385], symbol Tl.
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.
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).
Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.
The portion of the optic nerve seen in the fundus with the ophthalmoscope. It is formed by the meeting of all the retinal ganglion cell axons as they enter the optic nerve.
Levels within a diagnostic group which are established by various measurement criteria applied to the seriousness of a patient's disorder.
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.
Accumulations of solid or liquid animal excreta usually from stables and barnyards with or without litter material. Its chief application is as a fertilizer. (From Webster's 3d ed)
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.
A 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.
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 presence of contaminants or pollutant substances in the air (AIR POLLUTANTS) that interfere with human health or welfare, or produce other harmful environmental effects. The substances may include GASES; PARTICULATE MATTER; or volatile ORGANIC CHEMICALS.
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)
The veins and arteries of the HEART.
The branch of physics that deals with sound and sound waves. In medicine it is often applied in procedures in speech and hearing studies. With regard to the environment, it refers to the characteristics of a room, auditorium, theatre, building, etc. that determines the audibility or fidelity of sounds in it. (From Random House Unabridged Dictionary, 2d ed)
Radiography of blood vessels after injection of a contrast medium.
A potent benzodiazepine receptor antagonist. Since it reverses the sedative and other actions of benzodiazepines, it has been suggested as an antidote to benzodiazepine overdoses.
A beta-hydroxylated derivative of phenylalanine. The D-form of dihydroxyphenylalanine has less physiologic activity than the L-form and is commonly used experimentally to determine whether the pharmacological effects of LEVODOPA are stereospecific.
Imaging techniques used to colocalize sites of brain functions or physiological activity with brain structures.
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.
Materials or phenomena which can provide energy directly or via conversion.
Planned management, use, and preservation of energy resources.
Narrowing or constriction of a coronary artery.
A colorless alkaline gas. It is formed in the body during decomposition of organic materials during a large number of metabolically important reactions. Note that the aqueous form of ammonia is referred to as AMMONIUM HYDROXIDE.
A class of compounds of the type R-M, where a C atom is joined directly to any other element except H, C, N, O, F, Cl, Br, I, or At. (Grant & Hackh's Chemical Dictionary, 5th ed)
Positive test results in subjects who do not possess the attribute for which the test is conducted. The labeling of healthy persons as diseased when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)
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.
The narrow passage way that conducts the sound collected by the EAR AURICLE to the TYMPANIC MEMBRANE.
The flow of BLOOD through or around an organ or region of the body.
A subfamily of G-PROTEIN-COUPLED RECEPTORS that bind the neurotransmitter DOPAMINE and modulate its effects. D2-class receptor genes contain INTRONS, and the receptors inhibit ADENYLYL CYCLASES.
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.
Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.
A phosphodiesterase inhibitor that blocks uptake and metabolism of adenosine by erythrocytes and vascular endothelial cells. Dipyridamole also potentiates the antiaggregating action of prostacyclin. (From AMA Drug Evaluations Annual, 1994, p752)
The production of an image obtained by cameras that detect the radioactive emissions of an injected radionuclide as it has distributed differentially throughout tissues in the body. The image obtained from a moving detector is called a scan, while the image obtained from a stationary camera device is called a scintiphotograph.
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.
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.
Unstable isotopes of xenon that decay or disintegrate emitting radiation. Xe atoms with atomic weights 121-123, 125, 127, 133, 135, 137-145 are radioactive xenon isotopes.
The application of scientific knowledge or technology to the field of radiology. The applications center mostly around x-ray or radioisotopes for diagnostic and therapeutic purposes but the technological applications of any radiation or radiologic procedure is within the scope of radiologic technology.
A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.
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.
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).
Radiographic visualization of the aorta and its branches by injection of contrast media, using percutaneous puncture or catheterization procedures.
Computer-based representation of physical systems and phenomena such as chemical processes.
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.
An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.
High temperature destruction of waste by burning with subsequent reduction to ashes or conversion to an inert mass.
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.
Unstable isotopes of rubidium that decay or disintegrate emitting radiation. Rb atoms with atomic weights 79-84, and 86-95 are radioactive rubidium isotopes.
Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.
A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.
The formation of an area of NECROSIS in the CEREBRUM caused by an insufficiency of arterial or venous blood flow. Infarcts of the cerebrum are generally classified by hemisphere (i.e., left vs. right), lobe (e.g., frontal lobe infarction), arterial distribution (e.g., INFARCTION, ANTERIOR CEREBRAL ARTERY), and etiology (e.g., embolic infarction).
Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain.
Transfer of a neoplasm from its primary site to lymph nodes or to distant parts of the body by way of the lymphatic system.
A nitroimidazole that sensitizes normally radio-resistant hypoxic cells to radiation. It may also be directly cytotoxic to hypoxic cells and has been proposed as an antineoplastic.
An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.
Particles of any solid substance, generally under 30 microns in size, often noted as PM30. There is special concern with PM1 which can get down to PULMONARY ALVEOLI and induce MACROPHAGE ACTIVATION and PHAGOCYTOSIS leading to FOREIGN BODY REACTION and LUNG DISEASES.
A non-ionic, water-soluble contrast agent which is used in myelography, arthrography, nephroangiography, arteriography, and other radiological procedures.
Removal and pathologic examination of specimens in the form of small pieces of tissue from the living body.
Tumors or cancer of the LIVER.
A genus of the subfamily CERCOPITHECINAE, family CERCOPITHECIDAE, consisting of five named species: PAPIO URSINUS (chacma baboon), PAPIO CYNOCEPHALUS (yellow baboon), PAPIO PAPIO (western baboon), PAPIO ANUBIS (or olive baboon), and PAPIO HAMADRYAS (hamadryas baboon). Members of the Papio genus inhabit open woodland, savannahs, grassland, and rocky hill country. Some authors consider MANDRILLUS a subgenus of Papio.
The five-carbon building blocks of TERPENES that derive from MEVALONIC ACID or deoxyxylulose phosphate.
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.
The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)
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.
A combustible, gaseous mixture of low-molecular weight PARAFFIN hydrocarbons, generated below the surface of the earth. It contains mostly METHANE and ETHANE with small amounts of PROPANE; BUTANES; and higher hydrocarbons, and sometimes NITROGEN; CARBON DIOXIDE; HYDROGEN SULFIDE; and HELIUM. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
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)
Increase in the temperature of the atmosphere near the Earth's surface and in the troposphere, which can contribute to changes in global climate patterns.
Tumors or cancer of the MEDIASTINUM.
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 radionuclide imaging agent used primarily in scintigraphy or tomography of the heart to evaluate the extent of the necrotic myocardial process. It has also been used in noninvasive tests for the distribution of organ involvement in different types of amyloidosis and for the evaluation of muscle necrosis in the extremities.
Amides of salicylic acid.
The SKELETON of the HEAD including the FACIAL BONES and the bones enclosing the BRAIN.
Techniques for labeling a substance with a stable or radioactive isotope. It is not used for articles involving labeled substances unless the methods of labeling are substantively discussed. Tracers that may be labeled include chemical substances, cells, or microorganisms.
A class of organic compounds containing a ring structure made up of more than one kind of atom, usually carbon plus another atom. The ring structure can be aromatic or nonaromatic.
Timing the acquisition of imaging data to specific points in the cardiac cycle to minimize image blurring and other motion artifacts.
The part of the cerebral hemisphere anterior to the central sulcus, and anterior and superior to the lateral sulcus.
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.
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 study of the chemical and physical phenomena of radioactive substances.
Examination of the interior of the eye with an ophthalmoscope.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
One of the CARBONIC ANHYDRASE INHIBITORS that is sometimes effective against absence seizures. It is sometimes useful also as an adjunct in the treatment of tonic-clonic, myoclonic, and atonic seizures, particularly in women whose seizures occur or are exacerbated at specific times in the menstrual cycle. However, its usefulness is transient often because of rapid development of tolerance. Its antiepileptic effect may be due to its inhibitory effect on brain carbonic anhydrase, which leads to an increased transneuronal chloride gradient, increased chloride current, and increased inhibition. (From Smith and Reynard, Textbook of Pharmacology, 1991, p337)
The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulchi. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions.
Measurement of the index of refraction (the ratio of the velocity of light or other radiation in the first of two media to its velocity in the second as it passes from one into the other).
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 diversion of RADIATION (thermal, electromagnetic, or nuclear) from its original path as a result of interactions or collisions with atoms, molecules, or larger particles in the atmosphere or other media. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the properties of invasion and metastasis, compared to benign neoplasms.
Striped GRAY MATTER and WHITE MATTER consisting of the NEOSTRIATUM and paleostriatum (GLOBUS PALLIDUS). It is located in front of and lateral to the THALAMUS in each cerebral hemisphere. The gray substance is made up of the CAUDATE NUCLEUS and the lentiform nucleus (the latter consisting of the GLOBUS PALLIDUS and PUTAMEN). The WHITE MATTER is the INTERNAL CAPSULE.
The unconsolidated mineral or organic matter on the surface of the earth that serves as a natural medium for the growth of land plants.

The functional anatomy of the normal human auditory system: responses to 0.5 and 4.0 kHz tones at varied intensities. (1/4214)

Most functional imaging studies of the auditory system have employed complex stimuli. We used positron emission tomography to map neural responses to 0.5 and 4.0 kHz sine-wave tones presented to the right ear at 30, 50, 70 and 90 dB HL and found activation in a complex neural network of elements traditionally associated with the auditory system as well as non-traditional sites such as the posterior cingulate cortex. Cingulate activity was maximal at low stimulus intensities, suggesting that it may function as a gain control center. In the right temporal lobe, the location of the maximal response varied with the intensity, but not with the frequency of the stimuli. In the left temporal lobe, there was evidence for tonotopic organization: a site lateral to the left primary auditory cortex was activated equally by both tones while a second site in primary auditory cortex was more responsive to the higher frequency. Infratentorial activations were contralateral to the stimulated ear and included the lateral cerebellum, the lateral pontine tegmentum, the midbrain and the medial geniculate. Contrary to predictions based on cochlear membrane mechanics, at each intensity, 4.0 kHz stimuli were more potent activators of the brain than the 0.5 kHz stimuli.  (+info)

Comparative efficacy of positron emission tomography with FDG and computed tomographic scanning in preoperative staging of non-small cell lung cancer. (2/4214)

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

Sensitivity of [11C]phenylephrine kinetics to monoamine oxidase activity in normal human heart. (3/4214)

Phenylephrine labeled with 11C was developed as a radiotracer for imaging studies of cardiac sympathetic nerves with PET. A structural analog of norepinephrine, (-)-[11C]phenylephrine (PHEN) is transported into cardiac sympathetic nerve varicosities by the neuronal norepinephrine transporter and stored in vesicles. PHEN is also a substrate for monoamine oxidase (MAO). The goal of this study was to assess the importance of neuronal MAO activity on the kinetics of PHEN in the normal human heart. MAO metabolism of PHEN was inhibited at the tracer level by substituting deuterium atoms for the two hydrogen atoms at the alpha-carbon side chain position to yield the MAO-resistant analog D2-PHEN. METHODS: Paired PET studies of PHEN and D2-PHEN were performed in six normal volunteers. Hemodynamic and electrocardiographic responses were monitored. Blood levels of intact radiotracer and radiolabeled metabolites were measured in venous samples taken during the 60 min dynamic PET study. Myocardial retention of the tracers was regionally quantified as a retention index. Tracer efflux between 6 and 50 min after tracer injection was fit to a single exponential process to obtain a washout half-time for all left ventricular regions. RESULTS: Although initial heart uptake of the two tracers was similar, D2-PHEN cleared from the heart 2.6 times more slowly than PHEN (mean half-time 155+/-52 versus 55+/-10 min, respectively; P < 0.01). Correspondingly, heart retention of D2-PHEN at 40-60 min after tracer injection was higher than PHEN (mean retention indices 0.086+/-0.018 versus 0.066+/-0.011 mL blood/ min/mL tissue, respectively; P < 0.003). CONCLUSION: Efflux of radioactivity from normal human heart after uptake of PHEN is primarily due to metabolism of the tracer by neuronal MAO. Related mechanistic studies in the isolated rat heart indicate that vesicular storage of PHEN protects the tracer from rapid metabolism by neuronal MAO, suggesting that MAO metabolism of PHEN leaking from storage vesicles leads to the gradual loss of PHEN from the neurons. Thus, although MAO metabolism influences the rate of clearance of PHEN from the neurons, MAO metabolism is not the rate-determining step in the observed efflux rate under normal conditions. Rather, the rate at which PHEN leaks from storage vesicles is likely to be the rate-limiting step in the observed efflux rate.  (+info)

Enhanced myocardial glucose use in patients with a deficiency in long-chain fatty acid transport (CD36 deficiency). (4/4214)

CD36 is a multifunctional, 88 kDa glycoprotein that is expressed on platelets and monocytes/macrophages. CD36 also has high homology with the long-chain fatty acid (LFA) transporter in the myocardium. Although platelet and monocyte CD36 levels can indicate a CD36 deficiency, they cannot predict specific clinical manifestations in the myocardium of a given person. We examined the hypothesis that a deficiency in LFA transport augments myocardial glucose uptake in patients with a type I CD36 deficiency. METHODS: Seven fasting patients with a type I CD36 deficiency and 9 controls were assessed by cardiac radionuclide imaging using beta-methyl-p-iodophenyl-pentadecanoic acid (BMIPP) as a LFA tracer and by PET with 18F-fluorodeoxyglucose (FDG). RESULTS: None of the patients with a CD36 deficiency showed myocardial uptake of BMIPP. The percentage dose uptake of BMIPP in these subjects was significantly lower than that in normal controls (1.31+/-0.24 versus 2.90+/-0.2; P < 0.005). PET studies revealed that myocardial FDG accumulation was substantially increased in patients with a CD36 deficiency. Quantitative analysis showed that the percentage dose uptake of FDG in patients with a CD36 deficiency was significantly higher than that in normal controls (1.28+/-0.35 versus 0.43+/-0.22; P< 0.01). CONCLUSION: CD36 functions as a major myocardial LFA transporter and its absence may cause a compensatory upregulation of myocardial glucose uptake.  (+info)

Detection of liver metastases from pancreatic cancer using FDG PET. (5/4214)

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

L-[1-11C]-tyrosine PET to evaluate response to hyperthermic isolated limb perfusion for locally advanced soft-tissue sarcoma and skin cancer. (6/4214)

PET with L-[1-11C]-tyrosine (TYR) was investigated in patients undergoing hyperthermic isolated limb perfusion (HILP) with recombinant tumor necrosis factor alpha (rTNF-alpha) and melphalan for locally advanced soft-tissue sarcoma and skin cancer of the lower limb. METHODS: Seventeen patients (5 women, 12 men; age range 24-75 y; mean age 52 y) were studied. TYR PET studies were performed before HILP and 2 and 8 wk afterwards. The protein synthesis rates (PSRs) in nanomoles per milliliter per minute were calculated. After final PET studies, tumors were resected and pathologically examined. Patients with pathologically complete responses (pCR) showed no viable tumors after treatment. Those with pathologically partial responses (pPR) showed various amounts of viable tumors in the resected tumor specimens. RESULTS: Six patients (35%) showed a pCR and 11 patients (65%) showed a pPR. All tumors were depicted as hot spots on PET studies before HILP. The PSR in the pCR group at 2 and 8 wk after perfusion had decreased significantly (P < 0.05) in comparison to the PSR before HILP. A significant difference was found in PSR between the pCR and pPR groups at 2 and at 8 wk (P < 0.05). Median PSR in nonviable tumor tissue was 0.62 and ranged from 0.22 to 0.91. With a threshold PSR of 0.91, sensitivity and specificity of TYR PET were 82% and 100%, respectively. The predictive value of a PSR > 0.91 for having viable tumor after HILP was 100%, whereas the predictive value of a PSR < or = 0.91 for having nonviable tumor tissue after HILP was 75%. The 2 patients in the pPR groups with a PSR < 0.91 showed microscopic islets of tumor cells surrounded by extensive necrosis on pathological examination. CONCLUSION: Based on the calculated PSR after HILP, TYR PET gave a good indication of the pathological outcome. Inflammatory tissue after treatment did not interfere with viable tumor on the images, suggesting that it may be worthwhile to pursue TYR PET in other therapy evaluation settings.  (+info)

Reproducibility studies with 11C-DTBZ, a monoamine vesicular transporter inhibitor in healthy human subjects. (7/4214)

The reproducibility of (+/-)-alpha-[11C] dihydrotetrabenazine (DTBZ) measures in PET was studied in 10 healthy human subjects, aged 22-76 y. METHODS: The scan-to-scan variation of several measures used in PET data analysis was determined, including the radioactivity ratio (target-to-reference), plasma-input Logan total distribution volume (DV), plasma-input Logan Bmax/Kd and tissue-input Logan Bmax/Kd values. RESULTS: The radioactivity ratios, plasma-input Bmax/Kd and tissue-input Bmax/Kd all have higher reliability than plasma-input total DV values. In addition, measures using the occipital cortex as the reference region have higher reliability than the same measures using the cerebellum as the reference region. CONCLUSION: Our results show that DTBZ is a reliable PET tracer that provides reproducible in vivo measurement of striatal vesicular monoamine transporter density. In the selection of reference regions for DTBZ PET data analysis, caution must be exercised in circumstances when DTBZ binding in the occipital cortex or the cerebellum may be altered.  (+info)

Anatomic validation of spatial normalization methods for PET. (8/4214)

Spatial normalization methods, which are indispensable for intersubject analysis in current PET studies, have been improved in many aspects. These methods have not necessarily been evaluated as anatomic normalization methods because PET images are functional images. However, in view of the close relation between brain function and morphology, it is very intriguing how precisely normalized brains coincide with each other. In this report, the anatomic precision of spatial normalization is validated with three different methods. METHODS: Four PET centers in Japan participated in this study. In each center, six normal subjects were recruited for both H2(15)O-PET and high-resolution MRI studies. Variations in the location of the anterior commissure (AC) and size and contours of the brain and the courses of major sulci were measured in spatially normalized MR images for each method. Spatial normalization was performed as follows. (a) Linear: The AC-posterior commissure and midsagittal plane were identified on MRI and the size of the brain was adjusted to the Talairach space in each axis using linear parameters. (b) Human brain atlas (HBA): Atlas structures were manually adjusted to MRI to determine linear and nonlinear transformation parameters and then MRI was transformed with the inverse of these parameters. (c) Statistical parametric mapping (SPM) 95: PET images were transformed into the template PET image with linear and nonlinear parameters in a least-squares manner. Then, coregistered MR images were transformed with the same parameters used for the PET transformation. RESULTS: The AC was well registered in all methods. The size of the brain normalized with SPM95 varied to a greater extent than with other approaches. Larger variance in contours was observed with the linear method. Only SPM95 showed significant superiority to the linear method when the courses of major sulci were compared. CONCLUSION: The results of this study indicate that SPM95 is as effective a spatial normalization as HBA, although it does not use anatomic images. Large variance in structures other than the AC and size of the brain in the linear method suggests the necessity of nonlinear transformations for effective spatial normalization. Operator dependency of HBA also must be considered.  (+info)

Using multitracer positron emission tomography, I investigated regional hemodynamic and metabolic changes in both perifocal and remote tissues of cerebral angiomas, with special reference to steal phenomena.. In 22 patients (14 with arteriovenous malformations and eight with cavernomas) cerebral blood flow, cerebral blood volume, mean vascular transit time, cerebral metabolic rate for oxygen, oxygen extraction fraction, cerebral metabolic rate for glucose, and glucose extraction fraction were measured using standard positron emission tomographic methods. Twelve patients also had their cerebral glucose metabolism assessed during psychophysical activation. Regions of interest representing the angioma, perifocal and remote tissues, contralateral mirror regions, and standard brain regions were analyzed.. There were no significant changes in hemodynamic variables or oxygen metabolism in the ipsilateral cerebral hemisphere, but ipsilateral glucose metabolism was reduced both at rest (p less than 0.01) ...
• Using the oxygen 15 continuousinhalation technique and positron emission tomography (PET), the regional cerebral blood flow (rCBF), oxygen extraction fraction
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phdthesis{778462a2-a224-4f3d-9916-1149b935ebdb, abstract = {Positron emission tomography (PET) is a tracer technique used for quantitative in vivo studies of physiological and biochemical processes. Because of the use of positron-emitting radionuclides such as 11-C, 13-N, 15-O and 18-F, which are isotopes of the biologically ubiquitous elements, it is possible to label radiopharmaceuticals which trace biochemical processes precisely. In order to be able to utilize these useful positron-emitting radiopharmaceuticals without state-of-the-art PET systems, it is interesting to develop alternatives to standard commercial PET facilities.,br/,,br, ,br/,,br, Two different types of nuclear physics research accelerators have been used for the production of [18-F]fluoride, and the isotope produced has been used for radiolabelling of 2-[18F]fluoro-2-deoxy-D-glucose (2-18FDG). A rotating PET scanner, based on two scintillation camera heads, has been developed and used for human 2-18FDG studies. The ...
Cross-sectional findings using the tau tracer [18F]THK5317 (THK5317) have shown that [18F]fluorodeoxyglucose (FDG) positron emission tomography data can be approximated using perfusion measures (early-frame standardized uptake value ratio; ratio of tracer delivery in target to reference regions). In this way, a single positron emission tomography study can provide both functional Read & Research Alzheimers More. ...
The neuromodulatory effect of manipulating monoaminergic receptor function was assessed by combining a psychological and a pharmacological activation during repeated positron emission tomographic (PET) scans. The effects of buspirone (a 5-HT1A receptor partial agonist) on changes in regional cerebral blood flow (rCBF) associated with free word recall were examined. A factorial design was used to demonstrate a significant interaction (changes in rCBF brought about by psychological activation which depend on drug administration) in the left parahippocampal region. This interaction was an attenuation of increases in local neuronal activity (rCBF) related to memory function. Buspirone-induced decreases in rCBF, independent of the memory effect, were seen in the left prefrontal and parietal cortices. We suggest that combined psychological and pharmacological activation is a way of measuring direct (main) drug effects and modulatory effects on neurotransmission associated with cognitive functions (interaction
Quantitative, noninvasive biomarkers for lung-specific inflammation have yet to be developed but can potentially contribute significantly to the development of therapies to treat lung inflammation. The purpose of this study was to demonstrate that positron emission tomographic (PET) imaging with [18F}fluorodeoxyglucose (FDG-PET) can be used to quantify the change in lung inflammation in healthy volunteers ...
AutoSPECT: Cedars-Sinais one-step application for automatic reconstruction and reorientation of raw tomographic data (raw projections), with an emphasis on cardiac images. With a choice of filtering and reconstruction options (including iterative reconstruction) and an extremely high success rate for automatic reorientation (,95%), user interaction is reduced to a minimum ...
Nature. 1988 Feb 18;331(6157):585-9. Research Support, Non-U.S. Govt; Research Support, U.S. Govt, Non-P.H.S.; Research Support, U.S. Govt, P.H.S.
Looking for Positron-emission tomography? Find out information about Positron-emission tomography. see PET scan PET scan or positron emission tomography , a medical imaging technique that monitors metabolic, or biochemical, activity in the brain and other... Explanation of Positron-emission tomography
Previous neuroimaging studies have employed symptom provocation paradigms to examine the functional neuroanatomic correlates of emotions or behaviors that characterize particular psychiatric disorders. This study was designed to determine areas of differential brain activity associated with the hallmark food aversion of anorexia nervosa (AN). We hypothesized that this feature of AN would be associated with dysfunction within the paralimbic system. The tracer, oxygen 15-labeled carbon dioxide, was used to make positron emission tomographic measurements of regional cerebral blood flow (rCBF). We compared 8 young women with AN to 8 medically/psychiatrically healthy female control subjects during both a neutral and provoked state. Presentation of standardized neutral, low-caloric food stimuli (apple, lettuce) was followed by viewing of provocative, high-caloric food stimuli (cake, bagel + cream cheese). Heart rate was monitored by pulse oximetry and subjects completed emotional state analog scales ...
One the one hand, capillary permeability to water is a well-defined concept in microvascular physiology, and linearly relates the net convective or diffusive mass fluxes (by unit area) to the differences in pressure or concentration, respectively, that drive them through the vessel wall. On the other hand, the permeability coefficient is a central parameter introduced when modeling diffusible tracers transfer from blood vessels to tissue in the framework of compartmental models, in such a way that it is implicitly considered as being identical to the capillary permeability. Despite their simplifying assumptions, such models are at the basis of blood flow quantification by H215O Positron Emission Tomography. In the present paper, we use fluid dynamic modeling to compute the transfers of H215O between the blood and brain parenchyma at capillary scale. The analysis of the so-obtained kinetic data by the Renkin-Crone model, the archetypal compartmental model, demonstrates that, in this framework, ...
Positron Emission Tomography (PET) Scanners Market size will reach xx million US$ by 2029, from xx million US$ in 2018, at a CAGR of xx% during the forecast period. In this study, 2018 has been considered as the base year and 2016 - 2026 as the forecast period to estimate the market size for Positron Emission Tomography (PET) Scanners .. This industry study presents the Positron Emission Tomography (PET) Scanners Market size, historical breakdown data 2014-2019 and forecast 2016 - 2026. The Private Plane production, revenue and market share by manufacturers, key regions and type; The consumption of Positron Emission Tomography (PET) Scanners Market in volume terms are also provided for major countries (or regions), and for each application and product at the global level.. This Press Release will help you to understand the Volume, growth with Impacting Trends. Click HERE To get SAMPLE PDF (Including Full TOC, Table & Figures) at https://www.xploremr.com/connectus/sample/879. Positron Emission ...
Positron emission tomography (PET) with F-18 fluorodeoxyglucose (FDG) is improving the diagnosis, staging and treatment monitoring of a variety of cancers in comparison to alternative noninvasive imaging modalities. However, detection of small lesions is limited by image resolution and low signal to noise ratio. While computer-aided detection algorithms based on static PET may assist visual detection of lesions, the temporal domain information loss in the static image could impair the detection of lesions. In addition, spatial features such as the shape and contrast of a lesion in static PET images are highly variable and difficult to characterize. Since the dynamics of tracer uptake (tracer radioactivity) are different for normal and malignant tissue, the temporal domain provides potentially important additional features for use in lesion detection.; This dissertation focuses on three challenges in the detection of lesions in dynamic PET: feature extraction, detector design and thresholding ...
Positron emission tomography (PET) with F-18 fluorodeoxyglucose (FDG) is improving the diagnosis, staging and treatment monitoring of a variety of cancers in comparison to alternative noninvasive imaging modalities. However, detection of small lesions is limited by image resolution and low signal to noise ratio. While computer-aided detection algorithms based on static PET may assist visual detection of lesions, the temporal domain information loss in the static image could impair the detection of lesions. In addition, spatial features such as the shape and contrast of a lesion in static PET images are highly variable and difficult to characterize. Since the dynamics of tracer uptake (tracer radioactivity) are different for normal and malignant tissue, the temporal domain provides potentially important additional features for use in lesion detection.; This dissertation focuses on three challenges in the detection of lesions in dynamic PET: feature extraction, detector design and thresholding ...
article{Mateo:2014ch, author = {Mateo, J and Izquierdo-Garcia, D and Badimon, J J and Fayad, Z A and Fuster, V}, title = {{Noninvasive Assessment of Hypoxia in Rabbit Advanced Atherosclerosis Using 18F-fluoromisonidazole Positron Emission Tomographic Imaging}}, journal = {Circulation: Cardiovascular Imaging}, year = {2014}, volume = {7}, number = {2}, pages = {312--320}, month = mar, doi = {10.1161/CIRCIMAGING.113.001084}, pmid = {24508668}, pmcid = {PMC4083834}, language = {English}, read = {Yes}, rating = {0}, date-added = {2014-03-04T14:28:54GMT}, date-modified = {2020-09-17T14:01:10GMT}, abstract = {BACKGROUND: -Hypoxia is an important microenvironmental factor influencing atherosclerosis progression by inducing foam-cell formation, metabolic adaptation of infiltrated macrophages and plaque neovascularization. Therefore, imaging plaque hypoxia could serve as a marker of lesions at risk. METHODS AND RESULTS: -Advanced aortic atherosclerosis was induced in 18 rabbits by atherogenic diet and ...
We studied regional cerebral glucose metabolism in 15 patients with a clinical diagnosis of corticobasal degeneration (CBD), 15 patients with probable Alzheimers disease (AD), and 15 healthy controls
With the increasing utilization of integrated positron-emission tomography/computed tomography (PET/CT) using | A. D. Culverwell, Andrew Scarsbrook, Fahmid U. Cho | Clinical Radiology |
TY - JOUR. T1 - A hybrid nanoparticle probe for dual-modality positron emission tomography and magnetic resonance imaging. AU - Choi, Jin Sil. AU - Park, Jeong Chan. AU - Nah, Hyunsoo. AU - Woo, Seungtae. AU - Oh, Jieun. AU - Kim, Kyeong Min. AU - Cheon, Gi Jeong. AU - Chang, Yongmin. AU - Yoo, Jeongsoo. AU - Cheon, Jinwoo. PY - 2008/8/4. Y1 - 2008/8/4. N2 - (Figure Presented) Creating a good image: A probe for combined positron emission tomography (PET) and magnetic resonance imaging (MRI) has high colloidal stability and demonstrates facile conjugation ability. Sentinel lymph nodes are clearly identified in the fusion image (see picture; I: injection site) because of the complementary nature of the techniques, which makes accurate anatomical information and fault-free diagnosis possible.. AB - (Figure Presented) Creating a good image: A probe for combined positron emission tomography (PET) and magnetic resonance imaging (MRI) has high colloidal stability and demonstrates facile conjugation ...
OBJECTIVE: The serotonin transporter (5-HTT) is a key target for selective serotonin reuptake inhibitors and may be involved in the pathophysiology of major depression. It is now possible to image 5-HTT directly in the human brain, but results from studies of acutely depressed patients have been inconsistent. The purpose of this study was to determine whether abnormalities in 5-HTT might be present in recovered depressed patients. METHOD: The authors measured the binding potential of 5-HTT using [11C]DASB in conjunction with positron emission tomography (PET) in 24 medication-free, recovered depressed male patients and 20 healthy male comparison subjects. The regional estimates of binding potential were obtained using a metabolite-corrected plasma input function method followed by Logan analysis, with the cerebellum as a reference region. RESULTS: The authors found no significant difference in the binding potential of [11C]DASB between the recovered depressed patients and healthy comparison subjects in
Pietrini, Pietro and Guazzelli, Mario and Sarteschi, Pietro and Grady, Cheryl L. and Haxby, James V. and Swedo, Susan E. and Rapoport, Stanley I. and Schapiro, Mark B. Positron Emission Tomography (PET) as a tool to investigate cerebral glucose metabolism in neurologic and psychiatric disorders. Studies in dementia of the Alzheimer type and obsessive-compulsive disorder. In: Psychiatry and advanced technologies (ed. by L. Ravizza). Raven Press. ISBN 0781700035 (1993) Full text not available from this repository ...
Press Release issued Sep 7, 2017: Future Market Insights delivers key insights on the global Positron Emission Tomography scanners market in a new report titled, Positron Emission Tomography (PET) Scanners Market: Global Industry Analysis and Opportunity Assessment, 2016-2026. In terms of revenue, the global Positron Emission Tomography (PET) scanners market is projected to register a healthy CAGR of 4.7% over the forecast period.
October 31, 2011 - The Breast journal published new data from a prospective study conducted at the Seoul National University College of Medicine in Korea that shows positron emission mammography (PEM) has a higher sensitivity for tumor detection compared with whole-body positron emission tomography (PET)/ computed tomography (CT) when using both visual as well as quantitative analysis. These results were particularly striking and significant for smaller-sized tumors (less than 2 cm), likely due to the improved spatial resolution offered by PEM. This demonstrates PEMs clinical utility in being able to more effectively diagnosis early stage cancer.. According to recent journal articles, the sensitivity of PET/CT is limited, especially for low-grade and small tumors. Most PET/CT scanners currently provide a spatial resolution at 5 mm or greater, thus limiting PET/CTs ability to depict small-sized tumors such as invasive lobular carcinoma or ductal carcinoma in situ. This study provides a direct ...
A very simple and low-cost brain dedicated, rapidly rotating Single Photon Emission Tomograph SPECT is described. Its use in following patients with ischemic stroke is illustrated by two middle cerebral artery occlusion cases, one with persistent occlusion and low CBF in MCA territory, and one with early lysis of the occlusion having high CBF (massive luxury perfusion) for some weeks. Evidence of this kind may be essential in the evaluation of therapeutic measures in ischemic stroke. ...
The concept of positron emission tomography (PET) imaging revolves around the measurement of a patients in vivo radiotracer distribution. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body via biologically active molecules. As such, PET imaging can be described via a line-integral model of acquisition [1]. PET data are collected as projections in sinograms or listmode format [2]. The raw data collected by a PET scanner are a list of coincidence events representing near-simultaneous detection, each coincidence event represents a line in space connecting the two detectors along which the positron emission occurred. While one can employ the inverse Radon transform to recover tomograms from acquired PET data, such an approach can be unstable, particularly when dealing with noise-contaminated data [3]. Therefore, the filtered back projection algorithm, which is a stabilized and discretized version of the inverse ...
We offer in vivo micro positron emission tomography (PET) study design, execution and data analysis across a broad spectrum of disease models and analytic techniques. Our imaging experts and disease area experts design and execute PET studies for maximal clinical relevance, statistical power, and throughput. Our PET studies are performed using a Siemens Inveon scanner.. Positron emission tomography (PET) is a nuclear medicine imaging technique that generates 3D images of an injected PET radioisotope-labeled molecule in the body. Radiotracer distribution is detected via emitted gamma photons resulting from positron-electron annihilation. PET imaging in the preclinical setting (micro-PET) is increasingly being used in drug discovery to study disease biology and biodistribution and kinetics of biologic molecules.. ...
TY - JOUR. T1 - Differential diagnosis of lung tumor with positron emission tomography. T2 - A prospective study. AU - Kubota, K.. AU - Matsuzawa, T.. AU - Fujiwara, T.. AU - Ito, M.. AU - Hatazawa, J.. AU - Ishiwata, K.. AU - Iwata, Ren. AU - Ido, T.. PY - 1990/12/1. Y1 - 1990/12/1. N2 - To predict the nature of non-calcifying lung tumors, we performed a prospective study of 46 cases with L-[methyl 11C]methionine (MET, 24 cases) and 18F-fluorodeoxyglucose (FDG, 22 cases) using positron emission tomography (PET). Mean tumor/muscle radioactivity ratios are 5.3 ± 2.0 (n = 14) for malignant and 1.9 ± 0.9 (n = 10) for benign with MET (p , 0.001), and 4.4 ± 2.2 (n = 12) and 1.5 ± 0.3 (n = 10), respectively, with FDG (p , 0.001). The ratios indicate that malignant tumors have higher metabolic demand than benign lesions. Tumors less than 1 cm in diameter were difficult to accurately evaluate due to PET resolution. Compared to the diagnosis at pathology, the MET study showed a sensitivity of 93% ...
For thousands of years, we, as humans, have sought to understand the mechanisms responsible for neural activity (Walsh, 1978). As long ago as 10,000 B.C., craniotomies are known to have been performed. In the 1500s, Vesalius published the first anatomic drawings of the brain after an unprecedented observation and dissection of the brain. In the 19th century, lesion studies introduced the lesion/deficit hypothesis of neural functioning, which subsequently led to much of the current functional neuroanatomical terminology (e.g., Brocas and Wernickes areas). Through the last few decades of what may be considered modern neural research, a greater interest in the cognitive correlates of structural and functional brain lesions has led to the development of todays technology for imaging the nervous system (Mega, 1999, p. 41 ...
TY - JOUR. T1 - Radiopharmaceuticals labeled with short-lived positron-emitting radionuclides. AU - Welch, M. J.. AU - Kilbourn, M. R.. AU - Green, M. A.. PY - 1985. Y1 - 1985. UR - http://www.scopus.com/inward/record.url?scp=0021998913&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=0021998913&partnerID=8YFLogxK. U2 - 10.3769/radioisotopes.34.3_170. DO - 10.3769/radioisotopes.34.3_170. M3 - Review article. C2 - 3892598. AN - SCOPUS:0021998913. VL - 34. SP - 170. EP - 179. JO - Radioisotopes. JF - Radioisotopes. SN - 0033-8303. IS - 3. ER - ...
TY - JOUR. T1 - Frontal lobe activation during object alternation acquisition. AU - Zald, David H.. AU - Curtis, Clayton. AU - Chernitsky, Laura A.. AU - Pardo, José V.. PY - 2005/1. Y1 - 2005/1. N2 - Object alternation (OA) tasks are increasingly used as probes of ventral prefrontal functioning in humans. In the most common variant of the OA task, subjects must deduce the task rule through trial-and-error learning. To examine the neural correlates of OA acquisition, the authors measured regional cerebral blood flow with positron emission tomography while subjects acquired an OA task, performed a sensorimotor control condition, or performed already learned and practiced OA. As expected, activations emerged in the ventral prefrontal cortex. However, activation of the presupplemental motor area was more closely associated with successful task performance. The authors suggest that areas beyond the ventral prefrontal cortex are critically involved in OA acquisition.. AB - Object alternation (OA) ...
Viewing of single words produces a cognitively complex mental state in which anticipation, emotional responses, visual perceptual analysis, and activation of orthographic representations are all occurring. Previous PET studies have produced conflicting results, perhaps due to the conflation of these separate processes or the presence of subtle differences in stimulus material and methodology. A PET study of 10 normal individuals was carried out using the bolus H215O intravenous injection technique to examine components of processing of passively viewed words. Subjects viewed blocks of random-letter strings or abstract, concrete, or emotional words (words with positive or negative emotional salience). Baseline conditions were either passive viewing of plus signs or an anticipatory state (viewing plus signs after being warned to expect words or random letters to appear imminently). All words (and to a lesser extent the random letters) produced robust activation of cerebral blood flow in the left ...
The aim of the study is to determine if regional cerebral blood flow, measured by dynamic arterial spin labeling (dASL), can be a biomarker for stage of Alzheimers disease. The study is designed to be conducted in 2 parts in participants with mild to moderate Alzheimers disease, and participants with normal cognition. Various imaging studies will be done using magnetic resonance imaging (MRI) and positron emission tomography (PET) along with neurocognitive assessments. Participants who meet the study-entry criteria will have up to 8 study visits. Repeat imaging studies may be required if the initial data are incomplete or un-interpretable. The maximum number of PET scans during the study will be limited to four ...
What?. Positron emission tomography, also called PET imaging or a PET scan, is a diagnostic examination that uses signals emitted by radioactive tracers to construct images of the distribution of the tracers (positrons) in the human body. Positrons are tiny particles emitted from a radioactive substance administered to the patient. The subsequent images of the human body developed with this technique are used to evaluate a variety of diseases.. When? What are some common uses of the procedure?. PET scans are used most often to detect cancer and to examine the effects of cancer therapy by characterizing biochemical changes in the cancer. These scans can be performed on the whole body. PET scans of the heart can be used to determine blood flow to the heart muscle and help evaluate signs of coronary artery disease. PET scans of the heart can also be used to determine if areas of the heart that show decreased function are alive rather than scarred as a result of a prior heart attack, called a ...
Future Market Insights delivers key insights on the global Positron Emission Tomography scanners market in a new report titled, „Positron Emission Tomography (PET) Scanners Market: Global Industry Analysis and Opportunity Assessment, 2016-2026. In terms of revenue, the global Positron Emission Tomography (PET) scanners market is projected to register a healthy CAGR of 4.7% over the forecast period.. According to Future Market Insights, growing occurrences of chronic disorders and increasing penetration of PET machines is expected to drive overall growth of the global Positron Emission Tomography (PET) scanners market during the forecast period. Rising demand for effective diagnostic techniques across the globe and expanded applications for PET in the field of oncology are further expected to boost the growth of the global Positron Emission Tomography (PET) scanners market between 2016 and 2026. However, a short half-life and low supply of radiopharmaceuticals is likely to restrict market ...
These findings suggest that (18)F T807 PET could have value as a biomarker that reflects both the progression of AD tauopathy and the emergence of clinical impairment.
Dive into the research topics of Phantom evaluation of simultaneous thallium-201/technetium-99m aquisition in single-photon emission tomography. Together they form a unique fingerprint. ...
Global (North America, Europe and Asia-Pacific, South America, Middle East and Africa) Positron Emission Tomography (PET) Scanners Market 2017 Forecast to 2022. Positron-emission tomography (PET) is a nuclear medicine functional imaging technique that is used to observe metabolic processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule. Three-dimensional images of tracer concentration .... January 2018 , $4880 ,View Details>> ...
Global (North America, Europe and Asia-Pacific, South America, Middle East and Africa) Positron Emission Tomography (PET) Scanners Market 2017 Forecast to 2022. Positron-emission tomography (PET) is a nuclear medicine functional imaging technique that is used to observe metabolic processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule. Three-dimensional images of tracer concentration .... January 2018 , $4880 ,View Details>> ...
Positron emission tomography/computed tomography (PET/CT) with 18Ffluorodeoxyglucose (FDG) - ABDOMEN/PELVIS answers are found in the Guide to Diagnostic Tests powered by Unbound Medicine. Available for iPhone, iPad, Android, and Web.
Browse our extensive catalog of new & used PET/CT Equipment for sale or auction. Find any required new, refurbished or used PET/CT Equipment or device.
OBJECTIVES: To assess the accuracy of 68Gallium-prostate-specific membrane antigen (68Ga-PSMA) positron emission tomography/computed tomography (PET/CT) for lymph node (LN) staging in intermediate- and high-risk prostate cancer (PCa). MATERIALS AND METHODS: From April to October 2015, 30 patients with intermediate- (n = 3) or high-risk (n = 27) PCa were prospectively enrolled. Patients underwent preoperative 68Ga-PSMA PET/CT. Both visual and semi-quantitative analyses were undertaken. Subsequently, all patients underwent radical prostatectomy (RP) with an extended pelvic lymph node dissection. The sensitivity, specificity, and positive (PPV) and negative predictive value (NPV) for LN status of 68Ga-PSMA were calculated using histopathology as reference. RESULTS: Eleven patients (37%) had lymph node metastases (LNMs); 26 LNMs were identified in the 11 patients. Patient analysis showed that 68Ga-PSMA PET/CT had a sensitivity of 64% for the detection of LNMs, its specificity was 95%, the PPV was 88%, and
1 Answer to Efficacy of Positron Emission Tomography/Computed Tomography in staging of cancers Introduction In the last few decades, CT was regarded as the gold standard imaging method in in oncology as it was used for the initial staging, evaluation of tumors after treatment, and follow up of those patients...
OP43 - When should dynamic 18F-Choline Positron Emission Tomography/Computed Tomography acquisition be performed in suspected recurrence of prostatic cancer ...
Positron emission tomography scanning is a diagnostic technique based on detection of positrons emitted by labeled substances introduced into the body.
Positron emission tomography (PET / CT) is the most effective method of diagnostics of possible oncological diseases. It helps to determine the source, size,
This is a prospective study evaluating the role of Positron Emission Tomography (PET scan) in breast cancer. The radiopharmaceutical [18F] 2-deoxygluco
Positron emission tomography (PET) scanning is emerging as a very useful modality for staging and assessment of colorectal cancers. The newest addition, a fusion PET-CT scan, allows for detection of m... more
Use this page to view details for the MEDCAC Meeting for medcac meeting 1/30/2013 - beta amyloid positron emission tomography (pet) in dementia and neurodegenerative disease .
The purpose of this study is to see if Positron Emission Tomography (PET) imaging with a radioactive form of the hormone progesterone called FFNP will g
Using statistical methods the reconstruction of positron emission tomography (PET) images can be improved by high-resolution anatomical information obtaine
Positron emission tomography (PET), a nuclear imaging technology for in vivo quantification of blood flow, metabolism, and protein distribution, is an invaluable tool for developing novel personalized therapies for high morbidity and mortality brain disorders (Benton et al., 2007; Depression Guideline Panel, 1999; Michalak et al., 2008; Trivedi, 2003; Vogt et al., 1994).
Respiratory and cardiac motion leads to image degradation in Positron Emission Tomography (PET), which impairs quantification. In this book, the authors present approaches to motion estimation and mot
Single-photon emission computed tomographyEdit. Single-photon emission computed tomography (SPECT) is similar to PET and uses ... Positron emission tomographyEdit. Positron emission tomography (PET) and brain positron emission tomography, measure emissions ... Computed axial tomographyEdit. Main article: CT head. Computed tomography (CT) or Computed Axial Tomography (CAT) scanning uses ... the development of radioligands allowed single photon emission computed tomography (SPECT) and positron emission tomography ( ...
Single photon emission computed tomography (SPECT)Edit. Single photon emission computed tomography (SPECT), a nuclear medicine ... Computed tomography (CT)Edit. Coronary Computed Tomography Angiography (CCTA)Edit. Image of contrast enhanced dual-source ... Positron emission tomography (PET)Edit. Positron emission tomography (PET), a nuclear medicine imaging methodology for positron ... Computed tomography angiography (CTA), an imaging methodology using a ring-shaped machine with an X-Ray source spinning around ...
ST = Single-photon Emission Computed Tomography. *TG = Thermography. *US = Ultrasound. *VF = Videofluorography (retired) ...
Iterative reconstruction techniques in emission computed tomography. Phys Med Biol. 2006; 51(15):R541-78. Lange K, et al. EM ... Preclinical or small-animal Single Photon Emission Computed Tomography (SPECT) is a radionuclide based molecular imaging ... "Advances in Pinhole and Multi-Pinhole Collimators For Single Photon Emission Computed Tomography Imaging". World Journal of ... Maximum likelihood reconstruction for emission tomography. IEEE Trans Med Imag. 1982; 1(2):113-22. Hudson HM, et al. ...
Positron emission tomography scans (i.e. PET scans) and positron emission tomography-computed tomography scans (i.e. PET-CT ... Whole body computed tomography scans (i.e. CT scans) frequently find enlarged mesenteric lymph nodes (i.e. lymph nodes attached ...
... and single-photon emission computed tomography (SPECT). If the object or region to be imaged is less than twice the full width ... "Quantitation in positron emission computed tomography: 1. Effect of object size". J. Comput. Assist. Tomogr. 3 (3): 299-308. ... It occurs in medical imaging and more generally in biological imaging such as positron emission tomography (PET) ... "Measurement of radiotracer concentration in brain gray matter using positron emission tomography: MRI-based correction for ...
Localized disease should be confirmed using, e.g. Positron emission tomography-computed tomography (i.e. PET/CT), Magnetic ...
Holman BL, Hill TC, Magistretti PL (1982). "Brain imaging with emission computed tomography and radiolabeled amines". ... amine and radiopharmaceutical drug used in cerebral blood perfusion imaging with single photon emission computed tomography ( ...
Single-photon emission computed tomography and Positron emission tomography. SPECT and PET use radioactive isotopes, which are ...
Schinkel AF, Valkema R, Geleijnse ML, Sijbrands EJ, Poldermans D (May 2010). "Single-photon emission computed tomography for ... Hulten EA, Carbonaro S, Petrillo SP, Mitchell JD, Villines TC (March 2011). "Prognostic value of cardiac computed tomography ...
Single photon emission computed tomography (SPECT) images may also be acquired. In some imaging centers, SPECT images may be ... while the positron emission of gallium 68 is imaged by positron emission tomography (PET). Gallium salts are taken up by tumors ... In the past, the gallium scan was the gold standard for lymphoma staging, until it was replaced by positron emission tomography ... It is indicated for positron emission tomography (PET) of prostate specific membrane antigen (PSMA) positive lesions in men ...
Single Photon Emission Computed Tomography). Another medical scintillography technique, the Positron-emission tomography (PET ... In contrast, SPECT and positron emission tomography (PET) form 3-dimensional images, and are therefore classified as separate ... Computer representation of false-color image of a cross section of human brain, based on scintillography in Positron-Emission ...
Single-photon computed tomography and positron-emission tomography". Breast Cancer Research. 7 (4): 153-62. doi:10.1186/bcr1201 ... photon transport in biological tissue Near-infrared window in biological tissue Time-domain diffuse optics Computed tomography ... Breast imaging Diffuse optical imaging Optical tomography Radiative transfer equation and diffusion theory for ... "Approximation of Mie scattering parameters in near-infrared tomography of normal breast tissue in vivo". Journal of Biomedical ...
Provides computed tomography (CT), positron emission tomography (PET) and molecular imaging technologies. Surgery, led by ... Molecular Imaging & Computed Tomography (MICT), led by Michael Barber, headquartered in Waukesha (near Milwaukee), Wisconsin, ... Imatron produced an Electron beam tomography (EBT) scanner that performs imaging applications used by physicians specializing ...
"Imaging of Lung Hamartomas by Multidetector Computed Tomography and Positron Emission Tomography". Ann Thorac Surg. 86 (6): ... Lung hamartomas may have popcorn-like calcifications on chest xray or computed tomography (CT scan). Lung hamartomas are more ...
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 ... In modern PET computed tomography scanners, three-dimensional imaging is often accomplished with the aid of a computed ...
Amen advocates the use of (single photon emission computed tomography SPECT) imaging for diagnostic purposes.[7] His marketing ... Amen's practices use single-photon emission computed tomography, or SPECT, scans of brain activity in an attempt to compare the ... on Brain Imaging and Child and Adolescent Psychiatry With Special Emphasis on Single Photon Emission Computed Tomography (SPECT ...
Other noninvasive diagnostics include positron emission tomography and computed tomographic angiography (CT angiography). In ... positron emission tomography, computed tomographic angiography (CT angiography) and a variety of biomarkers. Statins and ...
Although studies using MRI or single-photon emission computed tomography (SPECT) often find abnormalities, the value of these ... March 2008). "Single photon emission computed tomography and magnetic resonance imaging evaluation in SLE patients with and ... November 2006). "Migraine during systemic lupus erythematosus: findings from brain single photon emission computed tomography ... Kovacs JA, Urowitz MB, Gladman DD, Zeman R (July 1995). "The use of single photon emission computerized tomography in ...
Rather, single-photon emission computed tomography (SPECT) is more common in the US. With multihead SPECT systems, imaging can ... The positron emission tomography (PET) tracer nitrogen-13 ammonia, though less widely available, may offer significantly ... Society of Cardiovascular Computed Tomography, Society for Cardiovascular Magnetic Resonance, and Society of Thoracic Surgeons ...
Assessment with xenon 133 single-photon emission computed tomography and the Tower of London". Archives of General Psychiatry. ... This finding was confirmed in subsequent studies using the improved spatial resolution of positron emission tomography with the ... Buchsbaum, Monte S. (1982). "Cerebral Glucography With Positron Tomography". Archives of General Psychiatry. 39 (3): 251-9. doi ...
Siemens was the first to combine positron emission tomography (PET) with computed tomography (CT). By creating this hybrid ... The company released its first computed tomography scanner, the Siretom, in 1975, a year after it exhibited its first ...
Contrast computed tomography and/or contrast-enhanced magnetic resonance imaging of the liver is required to assess tumor and ... Positron emission tomography may also be performed to evaluate changes in metabolic activity. Complications include ... Weeks after treatment, computed tomography or MRI can be performed to evaluate anatomic changes. Holmium-166 microspheres will ... Yttrium-90 can be imaged using bremsstrahlung SPECT and positron emission tomography (PET). Bremsstrahlung SPECT makes use of ...
Generally, this staging should include positron emission tomography, computed tomography, or magnetic resonance imaging; lumbar ...
... a single photon emission computed tomography study". Brain. 122 (Pt 7): 1271-82. doi:10.1093/brain/122.7.1271. PMID 10388793. ...
"Myocardial Perfusion Imaging with Combined Single-photon Emission Computed Tomography and Multislice Computed Tomography". ... An electrocardiogram (ECG) guides the image acquisition, and the resulting set of single-photon emission computed tomography ( ... 25 May 2018). "Single Photon Emission Computed Tomography (SPECT) Myocardial Perfusion Imaging Guidelines: Instrumentation, ... Fathala, Ahmed (April 2011). "Myocardial perfusion single photon computed tomography: An Atlas". Journal of the Saudi Heart ...
Single-photon emission computed tomography (en) Asoziazio genetikoa. CCDC82 (en) , COL13A1 (en) , CLRN3 (en) , ODAPH (en) , ...
There he began work on single-photon emission computed tomography and non-invasive cardiac imaging. In 1983, Pettigrew ... including an effort to reduce the radiation dose patients receive in routine computed tomography (CT), building a national ...
... including single-photon emission computed tomography (SPECT), positron emission tomography (PET) and scintigraphy. The urea ... The emitted 159 keV gamma ray is used in single-photon emission computed tomography (SPECT). A 127 keV gamma ray is also ... It is used in positron emission tomography. 18F decays predominately by β emission, with a half-life of 109.8 min. It is made ... 4He 13N is used in positron emission tomography (PET scan). 15O decays by positron emission with a half-life of 122 sec. ...
Single photon emission computed tomography (SPECT) assessments may also be conducted pre and post treatment, depending on the ...
Magnetic resonance imaging (MRI) and single-photon emission computed tomography (SPECT) are two of the tests that can identify ...
... (CTLM) is the trademark of Imaging Diagnostic Systems, Inc. (IDSI, United States) for its ... The technology uses laser in the same way computed tomography uses X-Rays, these beams travel through tissue and suffer ... Optical computed tomography for imaging the breast: first look // Proc. SPIE, 2000, Vol. 4082, p. 40-45. ... Retrieved from "https://en.wikipedia.org/w/index.php?title=Computed_tomography_laser_mammography&oldid=795071324" ...
Positron emission tomography (PET) a nuclear medical imaging technique that produces a three-dimensional image or picture of ... Its most frequently used to work with magnetic resonance imaging (MRI) and computed tomography (CT) data sets. ... When labeled with the isotope fluorine-18 it is used as a radioligand in positron emission tomography (PET) studies of the ... Positron-emitting radionuclide (tracer). See Positron emission tomography. *Altanserin a compound that binds to a serotonin ...
... single-photon emission computed tomography (SPECT) 3-73: single-photon emission computed tomography with computed tomography ( ... positron emission tomography (PET) with full-ring scanner 3-75: positron emission tomography with computed tomography (PET / CT ... computed tomography (CT) 3-30...3-30: optical techniques 3-60...3-69: representation of the vascular system 3-70...3-76: ...
With Godfrey Hounsfield's invention of computed tomography (CT) in 1971, three-dimensional planning became a possibility and ... in the 1970s and positron emission tomography (PET) in the 1980s, has moved radiation therapy from 3-D conformal to intensity- ... The pattern of radiation delivery is determined using highly tailored computing applications to perform optimization and ...
Cranial computed topography, magnetic resonance imaging, and flurodeoxyglucose positron emission topography are just some of ... MRI or X-ray computed tomography abnormalities. *Oculomotor apraxia. *Microcephaly. *Macrocephaly. *Hyperreflexia ...
"Optical imaging of reporter gene expression using a positron-emission-tomography probe". Journal of Biomedical Optics. 15 (6): ... If the momentum of the particle is measured independently, one could compute the mass of the particle by its momentum and ... So the emission angle results in cos. ⁡. θ. =. 1. n. β. .. {\displaystyle \cos \theta ={\frac {1}{n\beta }}.}. Arbitrary ... reversing or steering Cherenkov emission at arbitrary angles given by the generalized relation: cos. ⁡. θ. =. 1. n. β. +. n. k ...
3D / ECT(英语:emission computed tomography). *SPECT(英语:Single-photon emission computed tomography) *gamma ray: Myocardial ... 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 ... Computed tomography of the head(英语:Computed tomography of the head) ...
2012). "No effects of short-term GSM mobile phone radiation on cerebral blood flow measured using positron emission tomography ... provide certification of antenna emission levels and assure compliance to ICNIRP standards and/or to other environmental ... there is no scientific proof that so-called shields significantly reduce exposure from electromagnetic emissions. Products that ...
... positron emission tomography)(PET) தனி ஒளியன் உமிழ்வு கணிப்புத் பிரித்துவரைவியல் (Single-photon emission computed tomography( ( ... Roobottom CA, Mitchell G, Morgan-Hughes G (November 2010). "Radiation-reduction strategies in cardiac computed tomographic ...
"A Bismuth Germanate-Avalanche Photodiode Module Designed for Use in High Resolution Positron Emission Tomography". IEEE ... Germanium is emerging as an important material for spintronics and spin-based quantum computing applications. In 2010, ... delayed proton emission.[46] 84. Ge. through 87. Ge. isotopes also exhibit minor β−. delayed neutron emission decay paths.[46] ...
Computed tomography of the head. *Quantitative computed tomography. *Spiral computed tomography. *High resolution CT ... There are confocal variants that achieve resolution below the diffraction limit such as stimulated emission depletion ... and used a rotating Nipkow disk to generate multiple excitation and emission pinholes.[16][21] ... "Confocal X-ray Fluorescence Imaging and XRF Tomography for Three Dimensional Trace Element Microanalysis". Microscopy and ...
... positron emission tomography (PET), single-photon emission tomography (SPECT). CT scans and MRI are the two techniques widely ... "Is cranial computed tomography unnecessary in children with a head injury and isolated vomiting?". BMJ. 365: l1875. doi:10.1136 ... "Is cranial computed tomography unnecessary in children with a head injury and isolated vomiting?". BMJ. 365: l1875. doi:10.1136 ... Computed tomography (CT) has become the diagnostic modality of choice for head trauma due to its accuracy, reliability, safety ...
"Role of positron emission tomography-computed tomography in staging and early chemotherapy response evaluation in children with ...
Computed Tomography, better known as C.T. Scans or CAT Scans have made an enormous contribution to medicine, however not ... One man is viewing his hand with a fluoroscope to optimise tube emissions, the other has his head close to the tube. No ... Electromagnetic radiation consists of emissions of electromagnetic waves, the properties of which depend on the wavelength. ...
Redirected from Single photon emission computed tomography). Single-photon emission computed tomography (SPECT, or less ... X-ray computed tomography (X-ray CT), and positron emission tomography (PET). ... Wikimedia Commons has media related to Single photon emission computed tomography.. *Human Health Campus, The official website ... Single-photon emission computed tomography. A SPECT slice of the distribution of technetium exametazime within a patient's ...
Single-photon emission (SPECT). *Positron-emission tomography (PET). Therapy. *Fast-neutron. *Neutron capture therapy of cancer ... Inductively coupled plasmas (ICP), formed typically in argon gas for optical emission spectroscopy or mass spectrometry ...
... positron emission tomography (PET), Near-infrared spectroscopy (NIRS) and other non-invasive scanning techniques to map anatomy ... National Alliance for Medical Imaging Computing. *Informatics for Integrating Biology and the Bedside ...
... single-photon emission computed tomography (SPECT), near-infrared spectroscopy (NIRS), and event-related optical signal (EROS ... EEG has also been combined with positron emission tomography. This provides the advantage of allowing researchers to see what ... EEG does not involve exposure to radioligands, unlike positron emission tomography.[28] ... and computed tomography (CT). Despite limited spatial resolution, EEG continues to be a valuable tool for research and ...
... blood flow and cerebral hematocrit in patients with cerebral ischemia measured by single-photon emission computed tomography". ...
... "computed tomography" could be used to describe positron emission tomography or single photon emission computed tomography ( ... For non-medical computed tomography, see industrial computed tomography scanning. For non-X-ray tomography, see Tomography. ... such as positron emission tomography (PET) and single-photon emission computed tomography (SPECT). X-ray tomography, a ... X-ray computed tomography (X-ray CT), computerized axial tomography scan (CAT scan),[2] computer aided tomography, computed ...
Computed Tomography, Some History and Recent Developments, Proc. of Symposia in Applied Mathematics, Vol. 29, p. 35, 1985 ... No less interesting are the results of Ambartsumian's research in the so-called continuous emission, observed in the spectras ... Contribution to tomography[edit]. Ambartsumian's works contributed to the development of Tomography. In particular He was the ... the first numerical inversion of the Radon transform and it gives the lie to the often made statement that computed tomography ...
They include computer-assisted imaging computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography ...
FDG positron emission tomography/computed tomography and multidetector computed tomography roles in thymic lesion treatment ...
CT scan and positron emission tomography are used for this determination.[1] If mediastinal lymph node involvement is suspected ... Baldwin, DR; Hansell, DM; Duffy, SW; Field, JK (Mar 7, 2014). "Lung cancer screening with low dose computed tomography". BMJ ( ... The United States Preventive Services Task Force (USPSTF) recommends yearly screening using low-dose computed tomography in ... computed tomography (CT) screening can detect cancer and give a person options to respond to it in a way that prolongs life.[64 ...
The angular power spectrum of polarized dust emission at intermediate and high Galactic latitudes". Astronomy & Astrophysics. ... Hawking and Page later found ambiguous results when they attempted to compute the probability of inflation in the Hartle- ... "Measuring the small-scale power spectrum of cosmic density fluctuations through 21 cm tomography prior to the epoch of ...
Single-photon emission computed tomography is a well established functional imaging technique in epilepsy that aids precise ... Single photon emission computed tomography Neuroimaging Clin N Am. 1995 Nov;5(4):647-73. ... Single-photon emission computed tomography is a well established functional imaging technique in epilepsy that aids precise ... Ictal single photon emission computed tomography studies in temporal lobe epilepsy demonstrate transient intense hyperemia in ...
A single photon emission computed tomography system includes a base for supporting a patient and a detector assembly adjacent ... Single photon emission computed tomography system. US5225980. Nov 27, 1991. Jul 6, 1993. General Electric Company. Reduction of ... A single photon emission computed tomography system includes a base for supporting a patient and a detector assembly adjacent ... A single photon emission computed tomography system includes a base for supporting a patient and a detector assembly adjacent ...
... In Depth Research 2020-2026 , Philips Healthcare, Siemens Healthcare, GE ... Emission Computed Tomography Market which would mention How the Covid-19 is Affecting the Positron Emission Computed Tomography ... Positron Emission Tomography Market Rapid Growth By top Players: Toshiba Corpora … Positron Emission Tomography Market is ... Global Positron Emission Tomography (PET) System Industry Market Analysis & Fore … Global Positron Emission Tomography (PET) ...
Redirected from Single photon emission computed tomography). Single-photon emission computed tomography (SPECT, or less ... X-ray computed tomography (X-ray CT), and positron emission tomography (PET). ... Wikimedia Commons has media related to Single photon emission computed tomography.. *Human Health Campus, The official website ... Single-photon emission computed tomography. A SPECT slice of the distribution of technetium exametazime within a patients ...
"Single-photon emission computed tomography" - news · newspapers · books · scholar · JSTOR (January 2014) (Learn how and when to ... "Single-photon emission computed tomography" - news · newspapers · books · scholar · JSTOR (January 2014) (Learn how and when to ... Single-photon emission computed tomography (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique ... X-ray computed tomography (X-ray CT), and positron emission tomography (PET). ...
What is Positron Emission Tomography - Computed Tomography (PET/CT) Scanning?. Positron emission tomography, also called PET ... manufacturers are now making single photon emission computed tomography/computed tomography (SPECT/CT) and positron emission ... What are the limitations of Positron Emission Tomography - Computed Tomography (PET/CT)?. Nuclear medicine procedures can be ... What are the limitations of Positron Emission Tomography - Computed Tomography (PET/CT)? ...
What is Positron Emission Tomography - Computed Tomography (PET/CT) Scanning?. Positron emission tomography, also called PET ... Images related to Positron Emission Tomography - Computed Tomography (PET/CT) * Videos related to Positron Emission Tomography ... What are the limitations of Positron Emission Tomography - Computed Tomography (PET/CT)?. Nuclear medicine procedures can be ... What are the limitations of Positron Emission Tomography - Computed Tomography (PET/CT)? ...
NIAID researchers used single-photon emission computed tomography (SPECT) and an CD4-specific imaging probe to assess immune ...
Neutron stimulated emission computed tomography (NSECT) is being developed as a non-invasive spectroscopic imaging technique to ...
The effect of object size on the capability of positron emission computed tomography to measure isotope concentrations in a ... Quantitation in positron emission computed tomography: 1. Effect of object size J Comput Assist Tomogr. 1979 Jun;3(3):299-308. ... The effect of object size on the capability of positron emission computed tomography to measure isotope concentrations in a ...
A positron emission tomography scan is known as a PET scan. PET scan is a type of test that may be used in cancer treatment. It ... Positron Emission Tomography and Computed Tomography (PET-CT) Scans. Approved by the Cancer.Net Editorial Board, 02/2020 ... A positron emission tomography scan is known as a PET scan. PET scan is a type of test that may be used in cancer treatment. It ...
Computed Tomography Device Market 2018 in-depth complete study of the current state of the Single Photon Emission Computed ... Global Market report from QY Market Research on Single Photon Emission ... The Single Photon Emission Computed Tomography Device market report analyzes the market on the basis of its major geographies, ... The Single Photon Emission Computed Tomography Device market report is a complete study of industry growth drivers, current ...
Positron Emission Tomography - Computed Tomography (PET-CT) Cetuximab Project. The safety and scientific validity of this study ... Molecular imaging with positron emission tomography (PET) using [18F] fluorodeoxyglucose (FDG) has been suggested as an early, ...
Computed Tomography and Positron Emission Tomography. Although imaging studies are not used in establishing a diagnosis of ALPS ... Positron emission tomography (PET) using18 fluoro-2-deoxy-D-glucose (FDG), or FDG-PET, is the standard for staging and follow- ... Positron emission tomography (PET) superimposed over a CT scan from a patient with autoimmune lymphoproliferative syndrome ( ... Positron emission tomography (PET) superimposed over a CT scan from a patient with autoimmune lymphoproliferative syndrome ( ...
Dynamic Whole Body Positron Emission Tomography/Computed Tomography Imaging. The safety and scientific validity of this study ... A Sub-study of 18F-DCFPyL Positron Emission Tomography / Computed Tomography (PET/CT) for Assessment of Recurrent Prostate ... Quantitative parameters obtained with dynamic whole body imaging using positron emission tomography (PET) can provide ... topogram will be acquired followed by very low dose whole body CT for attenuation correction and localization of PET emission ...
Emission computed tomography (ECT) is a type of tomography involving radioactive emissions. Types include positron emission ... tomography (PET) and Single-photon emission computed tomography (SPECT). The imaging agent used in SPECT emits gamma rays, as ...
Single Photon Emission Computed Tomography (SPECT). August 8, 2011 Single Photon Emission Computed Tomography is a functional ...
A Single Photon Emission Computed Tomography (SPECT) scan is a type of nuclear imaging test that shows how blood flows to ... SPECT (single photon emission computed tomography) scan. Overview. A single photon emission computed tomography (SPECT) scan is ... positron emission tomography (PET): a nuclear medicine test in which tissue function can be imaged. Damaged tissues have ... SPECT is a nuclear imaging scan that integrates computed tomography (CT) and a radioactive tracer. The tracer is what allows ...
... fluoro-D-glucose positron emission tomography and positron emission tomography/computed tomography hardware fusion for staging ... 18-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in the Management of Aggressive Non-Hodgkins B-Cell ... M. Hutchings, A. Loft, M. Hansen et al., "Position emission tomography with or without computed tomography in the primary ... P. L. Zinzani, V. Stefoni, M. Tani et al., "Role of [18F]fluorodeoxyglucose positron emission tomography scan in the follow-up ...
18-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in the Management of Aggressive Non-Hodgkins B-Cell ... "18-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in the Management of Aggressive Non-Hodgkins B-Cell ...
X-ray computed tomography (X-ray CT), and positron emission tomography (PET). SPECT is similar to PET in its use of radioactive ... Single-photon emission computed tomography (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique ... "D. Boulfelfel, R.M. Rangayyan, L.J. Hahn, R. Kloiber, Restoration of Single Photon Emission Computed Tomography Images". ... Luo, S, Zhou, T (2014). "Superiorization of EM algorithm and its application in single-photon emission computed tomography ( ...
... profiles at different time points were determined by single photon emission computed tomography/computed tomography. The ... whole-body single photon emission computed tomography/computed tomography imaging, and pharmacokinetics of carbon nanohorns in ... Radiolabeling, whole-body single photon emission computed tomography/computed tomography imaging, and pharmacokinetics of ... profiles at different time points were determined by single photon emission computed tomography/computed tomography. The ...
Positron Emission Tomography - (CT Tech - PET)StartDate: 12/26/2017Availabl ... Computed Tomography Technologist, positron emission tomography, PET, PET/CT, PET-CT, PET Imaging, CT tech, CT technologist, ... Computed Tomography Technologist - Positron Emission Tomography - (CT Tech - PET). StartDate: 12/26/2017Available Shifts: 8/10/ ... computed tomography tech, CT, radiology, radiologic technologist, radiologic, allied health, healthcare, health care, allied, ...
68Gallium-DOTATATE positron emission tomography-computed tomography (PET CT) changes management in a majority of patients with ... 68Gallium-DOTATATE positron emission tomography-computed tomography (PET CT) has shown superior accuracy in detecting grade 1 ...
Non-isotope Based Imaging Modalities vs Technetium-99m Single-Photon Emission Computed Tomography(99mTcSPECT) (MITNECB5). The ... Non-isotope Based Imaging Modalities vs Technetium-99m Single-Photon Emission Computed Tomography(99mTcSPECT) ...
Your way to finding the right doctor: Single photon emission computed tomography. Free-of-charge inquiry. ... Here you will find medical specialists in the field Single photon emission computed tomography. All listed physicians are ...
There are no reports on single photon emission computed tomography (SPECT) studies in the available literature. In this paper, ... INTRODUCTION Data on single photon emission computed tomography (SPECT) in tuberculous meningitis are lacking and prompted this ... 1991) Single photon emission computed tomography in patients with acute hydrocephalus or with cerebral ischaemia after ... Computed tomography and/or magnetic resonance imaging (MRI) and SPECT using99mTc-ethylene cystine dimer were performed in all ...
Our integrated circuits and reference designs help you create high performance computed tomography (CT) scanners with high ... Computed tomography (CT) and positron emission tomography (PET) scanner integrated circuits and reference designs ... Our integrated circuits and reference designs help you create high performance computed tomography (CT) scanners with high ...
PET/CT scans are performed to help your doctor appropriately plan treatment for your medical condition. Here is what youll need to know if your physician has ordered a PET/CT scan for you.
The relationship between absence coronary artery calcification and myocardial perfusion single photon emission computed ... Absent coronary artery calcium excludes inducible myocardial ischemia on computed tomography/positron emission tomography. ... a combined positron emission tomography/computed tomography study. Circulation. 2008;117 (13):1693-700. ... The data on the prevalence of myocardial ischemia on Myocardial Perfusion Single Photon Emission Computed Tomography (MPS) in ...
  • Single-photon emission computed tomography ( SPECT , or less commonly, SPET ) is a nuclear medicine tomographic imaging technique using gamma rays . (wikipedia.org)
  • A PET scanner detects these emissions "coincident" in time, which provides more radiation event localization information and, thus, higher spatial resolution images than SPECT (which has about 1 cm resolution). (wikipedia.org)
  • In addition, manufacturers are now making single photon emission computed tomography/computed tomography (SPECT/CT) and positron emission tomography/computed tomography (PET/CT) units that are able to perform both imaging exams at the same time. (radiologyinfo.org)
  • Single photon emission CT/CT (SPECT/CT) and positron emission tomography/CT (PET/CT) units can perform both exams at the same time. (radiologyinfo.org)
  • NIAID researchers used single-photon emission computed tomography (SPECT) and an CD4-specific imaging probe to assess immune system changes throughout macaques infected with SIV, a simian form of HIV, following initiation and interruption of antiretroviral therapy (ART). (federallabs.org)
  • Types include positron emission tomography (PET) and Single-photon emission computed tomography (SPECT). (wikipedia.org)
  • A single photon emission computed tomography (SPECT) scan is an imaging test that shows how blood flows to tissues and organs. (mayfieldclinic.com)
  • SPECT is a nuclear imaging scan that integrates computed tomography (CT) and a radioactive tracer. (mayfieldclinic.com)
  • Contrast-enhanced MRI and routine single photon emission computed tomography (SPECT) perfusion imaging for detection of subendocardial myocardial i. (nih.gov)
  • Myocardial infarcts are routinely detected by nuclear imaging techniques such as single photon emission computed tomography (SPECT) myocardial perfusion imaging. (nih.gov)
  • INTRODUCTION Data on single photon emission computed tomography (SPECT) in tuberculous meningitis are lacking and prompted this study. (bmj.com)
  • Computed tomography and/or magnetic resonance imaging (MRI) and SPECT using 99m Tc-ethylene cystine dimer were performed in all the patients. (bmj.com)
  • The SPECT studies were more frequently abnormal compared with computed tomography but did not correlate with stage of meningitis or outcome. (bmj.com)
  • There are no reports on single photon emission computed tomography (SPECT) studies in the available literature. (bmj.com)
  • Zhao M, Ning H, Feng M, Li S, Chang J, Qi C. Novel [ 99m TcN] 2+ Labeled EGFR Inhibitors as Potential Radiotracers for Single Photon Emission Computed Tomography (SPECT) Tumor Imaging. (mdpi.com)
  • 2014. "Novel [ 99m TcN] 2+ Labeled EGFR Inhibitors as Potential Radiotracers for Single Photon Emission Computed Tomography (SPECT) Tumor Imaging. (mdpi.com)
  • We conducted a retrospective study to reexamine the value of single-photon emission computed tomography (SPECT) in the evaluation of patients with neurotologic complaints, and to assess the intra- and inter-radiologist variability of SPECT readings. (thefreelibrary.com)
  • All patients had undergone brain scanning with SPECT during their evaluation, and almost all had also undergone magnetic resonance imaging (MRI) and standard computed tomography (CT). (thefreelibrary.com)
  • Single-photon emission computed tomography (SPECT) evaluates tissue metabolism by detecting electromagnetic radiation emitted from intravenous tracers. (thefreelibrary.com)
  • A single-photon emission computed tomography (SPECT) scan is a type of nuclear medicine study that involves intravenous injection of a radioactive pharmaceutical that will concentrate in the desired organ(s) and shows how well the organ is functioning. (rightdiagnosis.com)
  • We used 99mTc-hexamethylpropyleneamine oxime single-photon emission computed tomography (SPECT) to study cerebral perfusion in patients treated with streptokinase for acute ischemic stroke in an open and prospective study. (ahajournals.org)
  • ASTRO Patient Summary: Objective Versus Subjective Assessment of Single Photon Emission Computed Tomography (SPECT) Cardiac Perfusion Scans to Asse. (oncolink.org)
  • The study used a scan called Single Photon Emission Computed Tomography (or SPECT) to evaluate heart damage. (oncolink.org)
  • Serial single photon emission computed tomography (SPECT), near-infrared spectroscopy (NIRS), and transcranial doppler (TCD) sonography examinations were performed to investigate changes of cerebral perfusion and tissue oxygenation in a patient with complicated cerebral malaria that have been acquired in Nigeria. (ajtmh.org)
  • Single photon emission computed tomography ( SPECT ) is a three-dimensional nuclear medicine imaging technique combining the information gained from scintigraphy with that of computed tomography. (radiopaedia.org)
  • single photon emission computed tomography-computerized tomography (SPECT-CT) mainly for the purposes of attenuation correction and anatomical localization 1 . (radiopaedia.org)
  • Cone-beam emission CT (CE-SPECT) seems potentially useful for animal investigations, pediatric studies, and for brain imaging. (spie.org)
  • 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)
  • "Single-Photon Emission Computed Tomography Market: Global Industry Analysis (2012 - 2016) and Opportunity Assessment (2017 - 2027)," is Future Market Insights' recent report which offers insights on the various factors driving the popularity of single-photon emission computed tomography (SPECT) in seven regions across the globe. (pharmiweb.com)
  • Single-photon emission computed tomography (SPECT) scan showed that radioactivity mainly accumu. (medworm.com)
  • Thus, when used in combination with positron-emission tomography/single-photon emission computed tomography (PET/SPECT), β-amyloid imaging agents could serve as surrogate markers for the early diagnosis and neuropathogenetic studies of AD. (go.jp)
  • measured by EIT against single-photon emission computed tomography (SPECT) is performed on data acquired as part of a porcine animal trial. (diva-portal.org)
  • This invention relates generally to single photon emission computed tomography (SPECT) imaging and, more particularly, to scatter correction systems and methods for improving images generated from data collected by a SPECT scanner. (google.com)
  • In this report, the Global single photon emission computed tomography spect scanner sales market report 2016 market has been carefully studied with numerous features put into inspection for the market to be brought into clear picture before the readers. (qyresearchreports.com)
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  • They were initially expected to be equally successful in single-photon emission computed tomography (SPECT). (osapublishing.org)
  • This study assessed the validity of a novel approach to myocardial perfusion scintigraphy that provides the opportunity to avoid the drawbacks of standard same-day rest/stress technetium-99m sestamibi myocardial perfusion studies by using separate-acquisition dual-isotope rest thallium-201 and exercise technetium-99m sestamibi single-photon emisson computed tomography (SPECT). (onlinejacc.org)
  • The purpose of the study was to investigate the usefulness of quantitative salivary single-photon emission computed tomography/computed tomography (SPECT/CT) using Tc-99m pertechnetate in Sjögren's syndrome (SS). (springer.com)
  • What is the impact of an internal quality improvement project (QIP) on compliance with appropriate use criteria (AUC) for single-photon emission computed tomographic sestamibi (SPECT) in a single center? (acc.org)
  • Objectives This study aimed to evaluate the incidence and clinical outcomes of abnormal ventilation/perfusion (V/Q) single-photon emission computed tomography (SPECT) without thromboembolism, especially in patients with group I pulmonary arterial hypertension (PAH). (onlinejacc.org)
  • V/Q SPECT findings were reported using European Association of Nuclear Medicine criteria for pulmonary embolism followed by computed tomography pulmonary angiography screening for positive thromboembolism and further invasive pulmonary angiography for distal thromboembolism. (onlinejacc.org)
  • Martin Freesmeyer et al in recent edition of Radiology have reported an initial experience regarding the feasibility and applicability of quasi-integrated freehand single photon emission computed tomography (SPECT)/ultrasonography (US) fusion imaging in patients with thyroid disease. (blogspot.com)
  • Aims To determine diagnostic accuracy, effective radiation dose, and potential value of computed tomography coronary angiography (CTCA) for hybrid imaging with single-photon emission computed tomography (SPECT) comparing prospective electrocardiogram (ECG)-triggering vs. retrospective ECG-gating. (uzh.ch)
  • EF was evaluated using two software programs of quantitative gated single-photon emission computed tomography (SPECT) (QGS) and cardioREPO. (deepdyve.com)
  • In this multicenter study the comparative safety and diagnostic efficacy of single-photon emission computed tomography (SPECT) thallium imaging during adenosine-induced coronary hyperemia was compared with exercise treadmill stress. (onlinejacc.org)
  • The current clinical practice of reporting images obtained with single photon emission computed tomography (SPECT) with 99mTc-d,l-hexamethylpropylene amine oxime (99mTc HMPAO) images was examined by having 16 experts evaluate the appearance of SPECT images in patients with probable Alzheimer type dementia (ATD), patients with major depressive episode (DSM-IV), and healthy volunteers. (stir.ac.uk)
  • Quantitative parameters obtained with dynamic whole body imaging using positron emission tomography (PET) can provide additional and complementary information to standard PET. (clinicaltrials.gov)
  • The Center for Molecular and Biomolecular Imaging provided pilot funding for Prof. Anuj Kapadia's collaborative research into Neutron Stimulated Emission Computed Tomography (NSECT) spectroscopic examinations of tissue using the Spallation Neutron Sources (SNS) at Oak Ridge National Labs (ORNL). (duke.edu)
  • A.J. Kapadia, B.P. Harrawood, and G.D. Tourassi, "Validationi of a GEANT4 simulation of neutron stimulated emission computed tomography," SPIE Symposium on Medical Imaging , San Diego, CA, 69133H (2008). (duke.edu)
  • G.A. Agasthya and A.J. Kapadia, "A Technique to Locate Stored Iron in the Liver Using Attenuation Correction for Neutron Stimulated Emission Computed Tomography," IEEE Nuclear Science Symposium and Medical Imaging Conference , Orlando, FL (2009). (duke.edu)
  • A.J. Kapadia, "Neutron Stimulated Emission Computed Tomography: A New Technique for Spectroscopic Medical Imaging", Neutron Imaging and Applications , Anderson, McGreevy, Bilheux, Eds: Springer (2009). (duke.edu)
  • A.J. Kapadia, G.A. Agasthya, and G.D. Tourassi, "Detection of iron overload through neutron stimulated emission computed tomography: a sensitivity analysis study," SPIE Symposium on Medical Imaging , Orlando, FL, 725811 (2009). (duke.edu)
  • G.A. Agasthya, B.P. Harrawood, J.P. Shah, and A.J. Kapadia, "Sensitivity analysis for liver iron measurement through neutron stimulated emission computed tomography: a Monte Carlo study in GEANT4", Phys Med Biol , 57, 113-126 (2012). (duke.edu)
  • New iodinated neuroreceptor single photon emission computed tomography imaging agents hold promise in localizing the seizure focus (focally reduced uptake) without ictal injection, and also may elucidate underlying mechanisms inherent to epilepsy. (nih.gov)
  • The data on the prevalence of myocardial ischemia on Myocardial Perfusion Single Photon Emission Computed Tomography (MPS) in symptomatic patients with zero CACS and low to intermediate risk probability is lacking and controversial. (pulsus.com)
  • In a previous study, in the symptomatic patients, the absence of measurable CAC has a high negative predictive value of obstructive CAD [ 7 ] and may exclude inducible ischemia at functional testing as myocardial perfusion Positron Emission Tomography (PET) in patients at low or intermediate risk for CAD [ 8 ]. (pulsus.com)
  • Assessment of coronary ischaemia by myocardial perfusion dipyridamole stress technetium-99 m tetrofosmin, single-photon emission computed tomography, and coronary angiography in children with Kawasaki disease: pre- and post-coronary bypass grafting. (biomedsearch.com)
  • Evaluation of myocardial perfusion by single-photon emission computed tomography may identify the haemodynamic significance of coronary lesions. (biomedsearch.com)
  • Of the 21 patients, 16 (groups I and II) patients with myocardial perfusion defects, who underwent coronary bypass grafting, were followed up with single-photon emission computed tomography. (biomedsearch.com)
  • Conclusion: Technetium-99 m tetrofosmin single-photon emission computed tomography can be applied as an accurate non-invasive diagnostic technique for detecting myocardial perfusion defects with coronary artery lesions, and to show improved or even normalised perfusion of the myocardium in patients after surgical revascularisation. (biomedsearch.com)
  • BACKGROUND: -Previous studies have shown that the presence of stenosis alone on multislice computed tomography (MSCT) has a limited positive predictive value for the presence of ischemia on myocardial perfusion imaging (MPI). (uzh.ch)
  • The present study aims at validating CCO decrease with quantitative 13N-ammonia positron emission tomography (PET) myocardial perfusion imaging (MPI). (springermedizin.de)
  • Role of 18 F-FDG PET/CT in staging and follow-up of lymphoma in pediatric and young adult patients," Journal of Computer Assisted Tomography , vol. 30, no. 4, pp. 689-694, 2006. (hindawi.com)
  • Journal of Computer Assisted Tomography. (ovid.com)
  • Positron emission tomography, also called PET imaging or a PET scan, is a type of nuclear medicine imaging. (radiologyinfo.org)
  • A positron emission tomography scan is known as a PET scan. (cancer.net)
  • These are the diseases or medical conditions in which the medical test 'Single-photon emission computed tomography scan' may be involved. (rightdiagnosis.com)
  • OUTLINE: Patients undergo a non-contrast computed tomography (CT) scan followed by a fludeoxyglucose F 18 positron emission tomography/computed tomography (PET/CT) imaging scan to plan treatment volumes. (bioportfolio.com)
  • A computed tomography scan employs computer processed arrangements of several X-ray images which have been taken from many different angles in order to produce tomographic or cross sectional virtual slices or images of precise areas of a particular scanned object. (qyresearchreports.com)
  • Computed tomography is used in the medical field for the purpose of scanning head, lungs, pulmonary angiogram, cardiac, abdominal and pelvic region, and at times to scan fractures occurring in joints and other ligaments and even dislocation of bones. (qyresearchreports.com)
  • Quantitation in positron emission computed tomography: 1. (nih.gov)
  • Dual-Energy Computed Tomography-Based Iodine Quantitation for Response Evaluation of Lung Cancers to Chemoradiotherapy/Radiotherapy: A Comparison With Fluorine-18 Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography-Based Positron Emission Tomography/Computed Tomography Response Evaluation Criterion in Solid Tumors. (bioportfolio.com)
  • The objective of this study was to investigate the correlation between dual-energy computed tomography (DECT)-based iodine quantitation and fluorine-18 fluorodeoxyglucose (F-FDG) positron emission tom. (bioportfolio.com)
  • Single-photon emission computed tomography quantitation of gallium citrate uptake for the differentiation of lymphoma from benign hilar uptake. (harvard.edu)
  • Even-Sapir E, Bar-Shalom R, Israel O, Frenkel A, Iosilevsky G, Haim N, Epelbaum R, Gaitini D, Kolodny GM, Front D. Single-photon emission computed tomography quantitation of gallium citrate uptake for the differentiation of lymphoma from benign hilar uptake. (harvard.edu)
  • Molecular imaging with positron emission tomography (PET) using [18F] fluorodeoxyglucose (FDG) has been suggested as an early, sensitive marker of tumour response to anticancer drugs by monitoring the changes in glucose metabolism in tumours. (clinicaltrials.gov)
  • Fluorine-18 fluorodeoxyglucose positron emission tomography, gallium-67 scintigraphy, and conventional staging for Hodgkin's disease and non-Hodgkin's lymphoma," American Journal of Medicine , vol. 112, no. 4, pp. 262-268, 2002. (hindawi.com)
  • The usefulness of 18 F-fluorodeoxyglucose positron emission tomography ( 18 F-FDG-PET) and a comparison of 18 F-FDG-PET with 67 gallium scintigraphy in the evaluation of lymphoma: relation to histologic subtypes based on the World Health Organization classification," Cancer , vol. 110, no. 3, pp. 652-659, 2007. (hindawi.com)
  • M. J. Shelly, S. McDermott, O. J. O'Connor, and M. A. Blake, "18-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in the Management of Aggressive Non-Hodgkin's B-Cell Lymphoma," ISRN Hematology , vol. 2012, Article ID 456706, 9 pages, 2012. (hindawi.com)
  • Is planar thallium-201/fluorine-18 fluorodeoxyglucose imaging a reasonable clinical alternative to positron emission tomographic myocardial viability scanning? (nii.ac.jp)
  • To investigate the correlation between 18 F-fluorodeoxyglucose positron emission tomography/computed tomography ( 18 F-FDG PET/CT) metabolic parameters and clinicopathological factors in pathological subtypes of invasive lung adenocarcinoma and prognosis. (frontiersin.org)
  • Rationale: Diagnostic procedures, such as positron emission tomography (PET) using fluorodeoxyglucose (FDG), may help determine response to standard cancer therapy in patients with cervic. (bioportfolio.com)
  • 11C-Methionine Positron Emission Tomography/Computed Tomography Versus 18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in Evaluation of Residual or Recurrent World Health Organization Grades II and III Meningioma After Treatment. (bioportfolio.com)
  • Visceral Adiposity in Psoriasis is Associated With Vascular Inflammation by (18)Fluorodeoxyglucose Positron-Emission Tomography/Computed Tomography Beyond Cardiometabolic Disease Risk Factors in an Observational Cohort Study. (bioportfolio.com)
  • Noninvasive 18 F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) imaging can measure neutrophil inflammation in VT. (nih.gov)
  • Here, we hypothesized (1) early fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) VT inflammation can predict subsequent vein wall scarring (VWS) and (2) statin therapy can reduce FDG-PET VT inflammation and subsequent VWS. (nih.gov)
  • Fluorodeoxyglucose positron emission tomography/computed tomography (PET/CT) can be potentially used to drive biopsy to the most metabolically active area within a lymph node or extranodal masses. (springer.com)
  • Whole-body conventional radiography remains the gold standard in the diagnostic evaluation, but computed tomography, magnetic resonance imaging and 18F-fluorodeoxyglucose positron emission tomography are increasingly used as complementary techniques in the detection of bone lesions. (haematologica.org)
  • A comprehensive literature search of the PubMed and Scopus databases and abstracts presented at the ASH meetings was carried out to find relevant peer-reviewed articles on the use of MRI, 18F-fluorodeoxyglucose positron emission tomography (FDG-PET), PET/CT and CT in the diagnosis and monitoring of treatment response in patients with MM. Unless stated otherwise, the retained sensitivity and specificity values are related to the results obtained with WBXR. (haematologica.org)
  • The aim of this study was to evaluate the clinical use of [F-18]-fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) in addition to conventional preoperative radiological investigations in a defined group of patients with high-risk muscle-invasive bladder cancer. (lu.se)
  • Is 18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography useful to discriminate metachronous lung cancer from metastasis in patients with oncological history? (minervamedica.it)
  • Aim - to evaluate the role of 18F-Fluorodeoxyglucose (18F-FDG) Positron Emission Tomography/Computed Tomography (PET/CT) in distinguishing whether solitary pulmonary nodules are metachronous cancers or metastases and the relationship between the nodule's characteristics and their nature. (minervamedica.it)
  • This data set may then be manipulated to show thin slices along any chosen axis of the body, similar to those obtained from other tomographic techniques, such as magnetic resonance imaging (MRI), X-ray computed tomography (X-ray CT), and positron emission tomography (PET). (wikipedia.org)
  • The diagnosis was based on clinical, computed tomographic, and cerebrospinal fluid (CSF) criteria. (bmj.com)
  • An emission tomographic system for imaging an object of interest is described. (google.com)
  • In many centers, nuclear medicine images can be superimposed with computed tomography (CT) or magnetic resonance imaging (MRI) to produce special views, a practice known as image fusion or co-registration. (radiologyinfo.org)
  • Many imaging centers combine nuclear medicine images with computed tomography (CT) or magnetic resonance imaging (MRI) to produce special views. (radiologyinfo.org)
  • Computed tomography and its application to nuclear medicine. (helsinki.fi)
  • Single-photon emission computed tomography is a well established functional imaging technique in epilepsy that aids precise noninvasive localization of the seizure focus required for surgical intervention in refractory seizures. (nih.gov)
  • Ictal single photon emission computed tomography studies in temporal lobe epilepsy demonstrate transient intense hyperemia in the anterior temporal lobe structures. (nih.gov)
  • Interictal single photon emission computed tomography with ipsilateral hypoperfusion, suffers from reduced sensitivity and accuracy, whereas ictal and, to a lesser extent, peri-ictal and postictal single photon emission computed tomography are highly sensitive and accurate in localizing temporal lobe epilepsy. (nih.gov)
  • A single photon emission computed tomography system includes a base for supporting a patient and a detector assembly adjacent the field of view. (google.com)
  • News Member Labs NIAID's Single-Photon Emission. (federallabs.org)
  • Global Market report from QY Market Research on Single Photon Emission Computed Tomography Device Market 2018 in-depth complete study of the current state of the Single Photon Emission Computed Tomography Device worldwide. (sbwire.com)
  • Deerfield Beach, FL -- ( SBWIRE ) -- 05/09/2018 -- The QY Group is providing latest report on Single Photon Emission Computed Tomography Device market report offers a rough analysis of the different trends and factors impacting the growth trajectory of the global market. (sbwire.com)
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  • The Single Photon Emission Computed Tomography Device market report is a complete study of industry growth drivers, current trends in the market, and restraints. (sbwire.com)
  • It provides global Single Photon Emission Computed Tomography Device market projections for the coming years. (sbwire.com)
  • Single Photon Emission Computed Tomography is a functional imaging technique that creates three-dimensional images of the brain on computer. (epilepsyontario.org)
  • Their tissue distribution profiles at different time points were determined by single photon emission computed tomography/computed tomography. (dovepress.com)
  • Here you will find medical specialists in the field Single photon emission computed tomography. (leading-medicine-guide.com)
  • Evaluating the role of single-photon emission computed tomography in the assessment of neurotologic complaints. (thefreelibrary.com)
  • Single photon emission computed tomography in systemic lupus erythematosus with psychiatric symptoms. (bmj.com)
  • This report is an essential reference for who looks for detailed information on China Single Photon Emission Computed Tomography market. (rnrmarketresearch.com)
  • In addition to the data part, the report also provides overview of Single Photon Emission Computed Tomography market, including classification, application, manufacturing technology, industry chain analysis and latest market dynamics. (rnrmarketresearch.com)
  • Reperfusion after thrombolytic therapy in ischemic stroke measured by single-photon emission computed tomography. (ahajournals.org)
  • Single-Photon Emission Computed Tomography/Computed Tomography Imaging in a Rabbit Model of Emphysema Reveals Ongoing Apoptosis In Vivo. (sigmaaldrich.com)
  • Rabbits were exposed to cigarette smoke for 4 or 16 weeks and underwent single-photon emission computed tomography/computed tomography scanning using technetium-99m-rhAnnexin V-128. (sigmaaldrich.com)
  • Technetium-99m-rhAnnexin V-128 single-photon emission computed tomography signal was increased after smoke exposure at 4 and 16 weeks, with confirmation of increased apoptosis through terminal deoxynucleotidyl transferase dUTP nick end labeling staining and increased tissue neutral sphingomyelinase activity in the tissue. (sigmaaldrich.com)
  • Objective: To evaluate diagnostic accuracy of dipyridamole stress technetium-99 m tetrofosmin, single-photon emission computed tomography as a possible alternative to invasive coronary angiography for detection and follow-up of myocardial ischaemia in patients with Kawasaki disease, and pre- and post-coronary bypass grafting. (biomedsearch.com)
  • Patients and methods: Coronary angiography and single-photon emission computed tomography were performed on 21 patients who were classified into three groups - group I (stenosis), group II (giant aneurysms), and group III (small aneurysms). (biomedsearch.com)
  • By value and by device development, the global single-photon emission computed tomography market report provides data on global single-photon emission computed tomography along with capacity utilisation and pricing structure across the different regional markets. (pharmiweb.com)
  • The report quantifies the market value and market volume share of various segments of the global single-photon emission computed tomography market across the studied regional markets, thereby performing a comprehensive analysis of the global single-photon emission computed tomography market across all levels. (pharmiweb.com)
  • The report features a competitive landscape to provide clients with a dashboard view, based on categories of providers in the value chain, presence in the single-photon emission computed tomography portfolio and key differentiators. (pharmiweb.com)
  • This section is primarily designed to provide clients with an objective and detailed comparative assessment of key providers specific to a market segment in the single-photon emission computed tomography supply chain and the potential players for the same. (pharmiweb.com)
  • Detailed profiles of providers are also included in the scope of the report to evaluate their long-term and short-term strategies, key offerings and recent developments in the global single-photon emission computed tomography market. (pharmiweb.com)
  • The price of single-photon emission computed tomography devices is deduced on the basis of average spending for the development of the particular type of system and associated devices. (pharmiweb.com)
  • For forecasting the global single-photon emission computed tomography market, various macroeconomic factors and changing trends have been observed, giving an idea about the future of the market. (pharmiweb.com)
  • In the compilation of the report, the forecasts are conducted in terms of CAGR, while other important criteria such as year-on-year growth and incremental dollar opportunity have also been incorporated presenting the client with crystal clear insights and future opportunities likely to emerge in the global single-photon emission computed tomography market. (pharmiweb.com)
  • Standardized Uptake Value from Semiquantitative Bone Single-Photon Emission Computed Tomography/Computed Tomography in Normal Thoracic and Lumbar Vertebrae of Breast Cancer Patients. (medworm.com)
  • Whole Body Positron Emission Tomography (PET) and Computed Tomography (CT) is a combined modality imaging technique which provides critical assistance to the physician in whole body tumor staging in a single session. (medicaltourismco.com)
  • Dougall N, Nobili F & Ebmeier KP (2004) Predicting the accuracy of a diagnosis of Alzheimer's disease with Tc-99m HMPAO single photon emission computed tomography, Psychiatry Research: Neuroimaging, 131 (2), pp. 157-168. (stir.ac.uk)
  • RATIONALE: Diagnostic procedures, such as positron emission tomography (PET) using fludeoxyglucose F 18, may help in learning how well chemotherapy works to kill cancer cells and allow doc. (bioportfolio.com)
  • 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 radiation therapy. (bioportfolio.com)
  • What is the diagnostic accuracy of positron emission tomography-computed tomography in patients with suspected infective endocarditis or infection of cardiac devices? (cadth.ca)
  • Seven systematic reviews with meta-analyses and 26 non-randomized studies were identified regarding the diagnostic accuracy of positron emission tomography-computed tomography (PET-CT) in patients with suspected infective endocarditis or infection of cardiac devices. (cadth.ca)
  • Use of positron emission tomography for response assessment of lymphoma: consensus of the imaging subcommittee of international harmonization project in lymphoma," Journal of Clinical Oncology , vol. 25, no. 5, pp. 571-578, 2007. (hindawi.com)
  • The aim of this study was to determine the assessment of positron emission tomography-computed tomography using C-methionine (MET PET/CT) for World Health Organization (WHO) grades II and III meningio. (bioportfolio.com)
  • Early assessment with 18F-2-fluoro-2-deoxyglucose positron emission tomography/computed tomography to predict short-term outcome in clear cell renal carcinoma treated with nivolumab. (urotoday.com)
  • The patients were referred to FDG-PET/CT in addition to standard preoperative investigation with computed tomography (CT). (lu.se)
  • The maximum standardized uptake value of preoperative positron emission tomography/computed. (deepdyve.com)
  • Radioactive emissions from the radiotracer are detected by a special camera or imaging device that produces pictures and provides molecular information. (radiologyinfo.org)
  • 68 Gallium-DOTATATE positron emission tomography-computed tomography (PET CT) has shown superior accuracy in detecting grade 1 and 2 neuroendocrine tumors over previous imaging modalities and was recently included in National Comprehensive Cancer Network guidelines. (nih.gov)
  • Our long-range objective is to obtain pilot data to investigate the ability of the new dual-modality positron emission tomography and computed tomography (PET-CT) imaging systems for assessing treatment response in patients with metastatic prostate cancer in comparison to conventional imaging. (knowcancer.com)
  • Whole body positron emission tomography/computed tomography showed strong accumulation of [ 18 F]-fluoro-deoxy-2-glucose (FDG) in the small pelvis, and pelvic magnetic resonance imaging revealed a 60×40-mm cystic lesion, with an irregular thickened wall, behind the prostate. (urotoday.com)
  • RS 510 Research I November, 16, 2012 Efficacy of Positron Emission Tomography/Computed Tomography in staging of cancers Introduction In the last few decades, CT was regarded as the gold standard imaging method in in oncology as it was used for the initial staging, evaluation of tumors after treatment, and follow up of those patients diagnosed with cancer. (transtutors.com)
  • RATIONALE: Imaging procedures such as positron emission tomography may improve the ability to detect the extent of cancer and allow doctors to plan more effective treatment for patients wh. (bioportfolio.com)
  • RATIONALE: Imaging procedures such as positron emission tomography may improve the ability to determine the stage of esophageal cancer. (bioportfolio.com)
  • Positron emission tomography/computed tomography (PET/CT) is a nuclear imaging technology that enables visualization of metabolic processes in the body following injection of a radioactively labeled ligand, also called tracer. (jove.com)
  • Since the 1980s, considerable technological advances in medical imaging have propelled computed tomography (CT), magnetic resonance imaging (MRI) and positron emission tomography (PET) to the forefront. (haematologica.org)
  • The research led to a full collaboration between Prof. Kapadia and ORNL, culminating in a federally funded research project (Department of Defense Award BC133814 - In-vivo Diagnosis of Breast Cancer using Neutron and Gamma Stimulated Emission Computed Tomography). (duke.edu)
  • 68Gallium-DOTATATE positron emission tomography-computed tomography (PET CT) changes management in a majority of patients with neuroendocrine tumors. (nih.gov)
  • Computed tomography was abnormal in 11 out of 16 patients and revealed hydrocephalus in nine, basal exudates, infarction in subcortical white matter and basal ganglia in six patients each, frontal cortical infarction in one, and granulomata in three patients. (bmj.com)
  • Purpose: To investigate the prognostic role of metabolic response by the use of serial sets of positron emission tomography/computed tomography (PET/CT) in patients with cervical cancer who were treated with concurrent chemoradiation therapy (CCRT). (osti.gov)
  • The aim of the present study was to investigate the value of positron emission tomography using 2-[18F]fluoro-2-deoxy-D-glucose (FDG-PET) and combined FDG-PET/CT for the staging of HL patients, and the impact on the choice of treatment. (haematologica.org)
  • Patients undergo fludeoxyglucose F18 (FDG) positron emission tomography/computed tomography scans 60 and 180 minutes after FDG administration. (bioportfolio.com)
  • What is the clinical utility of positron emission tomography-computed tomography compared to computed tomography in patients with suspected infective endocarditis or infection of cardiac devices? (cadth.ca)
  • No relevant literature was identified regarding the clinical utility or cost-effectiveness of PET-CT compared to computed tomography (CT) in patients with suspected infective endocarditis or infection of cardiac devices. (cadth.ca)
  • 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)
  • 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)
  • Jheon, Sanghoon 2018-01-01 00:00:00 INTRODUCTIONThe frequency of early detection of focal ground‐glass opacity nodules (GGN) has been increasing due to computed tomography (CT) screening programs and with advances in the quality of high resolution computed tomography (HRCT). (deepdyve.com)
  • RS 510 Research I November, 16, 2012 Total word count: 5263 Efficacy of Positron Emission Tomography/Computed Tomography in staging of cancers Abstract: This paper aims to analyze the Efficacy of Positron Emission Tomography/Computed Tomography in staging of cancers. (transtutors.com)
  • P. R. Mueller, J. T. Ferrucci Jr., and W. P. Harbin, "Appearance of lymphomatous involvement of the mesentery by ultrasonography and body computed tomography: the "sandwich sign"," Radiology , vol. 134, no. 2, pp. 467-473, 1980. (hindawi.com)
  • PURPOSE: This clinical trial is studying positron emission tomogaphy and computed tomography in determining differences in Hodgkin lymphoma and diffuse large B-cell lymphoma. (bioportfolio.com)
  • Lung computed tomography scans of long-term smoke-exposed rabbits exhibit anatomical similarities to human emphysema, with increased lung volumes compared with controls. (sigmaaldrich.com)
  • Objective: The objective of this study was to compare the accuracy of calculating the primary tumor volumes using a gradient-based method and fixed threshold methods on the standardized uptake value (SUV) maps and the net influx of FDG (Ki) maps from positron emission tomography-computed tomography (PET-CT) images. (diva-portal.org)
  • Positron emission tomography (PET) uses small amounts of radioactive materials called radiotracers, a special camera and a computer to help evaluate your organ and tissue functions. (radiologyinfo.org)
  • Emission computed tomography (ECT) is a type of tomography involving radioactive emissions. (wikipedia.org)
  • For this purpose, the samples were stepwise tensile loaded in the longitudinal (L) and radial (R) directions and the damage evolution was monitored in real-time by acoustic emission (AE) and synchrotron radiation micro-computed tomography (SRμCT). (degruyter.com)
  • This randomized phase II trial studies how well positron emission tomography (PET)/computed tomography (CT)-guided radiation therapy works compared to standard radiation therapy in treatin. (bioportfolio.com)
  • We reported previously the usefulness of 18F-2-fluoro-2-deoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) to predict prognosis of renal cell carcinoma (RCC) treated with molecular targeted agents. (urotoday.com)
  • Accuracy of low-dose computed tomography coronary angiography using prospective electrocardiogram-triggering: First clinical experience. (springermedizin.de)
  • In nuclear emission tomography, gamma cameras or detectors typically are used for locating and displaying human glands and organs and associated abnormalities. (google.com)
  • To assess the functional relevance of a coronary artery stenosis, corrected coronary opacification (CCO) decrease derived from coronary computed tomography angiography (CCTA) has been proposed. (springermedizin.de)
  • In this report, the United States Emission Computed Tomography System market is valued at USD XX million in 2017 and is expected to reach USD XX million by the end of 2025, growing at a CAGR of XX% between 2017 and 2025. (rnrmarketresearch.com)
  • A special camera detects gamma ray emissions from the radiotracer. (radiologyinfo.org)
  • For quantitative analysis and bio-kinetic modeling of positron emission tomography/computed tomography (PET/CT) data, the determination of the temporal blood time-activity concentration also known as arterial input function (AIF) is a key point, especially for the characterization of animal disease models and the introduction of newly developed radiotracers. (jove.com)
  • Emissions from the radionuclide indicate amounts of blood flow in the capillaries of the imaged regions. (wikipedia.org)
  • Efficacy of Positron Emission Tomography/Computed Tomography in staging of cancers. (transtutors.com)
  • What is Positron Emission Tomography - Computed Tomography (PET/CT) Scanning? (radiologyinfo.org)
  • Integrated positron emission tomography/computed tomography (PET-CT) is a well-validated modality for assessing pulmonary mass lesions and specifically for estimating risk of malignancy. (ajol.info)