positron emission tomography (PET)
- positron emission tomography (PET)
-
Imaging technique used in diagnosis and biomedical research.
A chemical compound labeled with a radioactive
isotope (see
radioactivity) that emits
positrons is injected into the body, and detectors measure their activity in the tissues as they combine with
electrons and are annihilated. Computers analyze, integrate, and reconstruct the data to produce images of the organs scanned. PET is particularly useful for studying
brain and
heart functions.
* * *
Universalium.
2010.
Look at other dictionaries:
Positron Emission Tomography (PET) — A tool used to diagnose brain functions and disorders. PET produces three dimensional, colored images of chemicals or substances functioning within the body. These images are called PET scans … Medical dictionary
Positron emission tomography — (PET) is a nuclear medicine imaging technique which produces a three dimensional image or map of functional processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron emitting radionuclide (tracer), which is… … Wikipedia
Positron Emission Tomography — Tomographie par émission de positons Pour les articles homonymes, voir TEP. Reconstruction tridimensionnelle de la distribution de glucose marqué au fluor 18 telle que mesurée par tomographie d émission de positons La tomographie … Wikipédia en Français
positron-emission tomography — n tomography in which an in vivo, noninvasive, cross sectional image of regional metabolism is obtained by a usu. color coded cathode ray tube representation of the distribution of gamma radiation given off in the collision of electrons in cells… … Medical dictionary
positron emission tomography — noun using a computerized radiographic technique to examine the metabolic activity in various tissues (especially in the brain) • Syn: ↑PET • Hypernyms: ↑imaging, ↑tomography * * * the process of producing a PET scan. Cf. PET scanner. * * *… … Useful english dictionary
positron emission tomography scanner — noun a tomograph that produces cross sectional X rays of metabolic processes in the body • Syn: ↑PET scanner • Hypernyms: ↑tomograph * * * positron emission tomography scanner ● positron … Useful english dictionary
positron emission tomography — (PET, positron emission computed tomography, PECT) a technique in nuclear medicine for cross sectional imaging that enables a noninvasive assessment and localization of metabolic activity to be made. Emission of a positron by a radioisotope… … Medical dictionary
positron emission tomography — (PET) tomography accomplished by detection of gamma rays emitted from tissues after administration of a natural biochemical substance (e.g., glucose, fatty acids) into which positron emitting isotopes have been incorporated. The paths of the… … Medical dictionary
positron emission tomography scan — PET scan. A procedure in which a small amount of radioactive glucose (sugar) is injected into a vein, and a scanner is used to make detailed, computerized pictures of areas inside the body where the glucose is used. Because cancer cells often use … English dictionary of cancer terms
Томография Позитронная Эмиссионная (Positron Emission Tomography (Pet)) — метод исследования, применяющийся для оценки активности тканей головного мозга. В основе данного метода лежит определение степени эмиссии радиоактивных частиц из молекул радиоактивной 2 дсоксиглюкозы. Это вещество попадает в головной мозг так же … Медицинские термины
