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Definition |
A technique for measuring the gamma radiation produced by collisions of electrons and positrons (anti-electrons) within living tissue. In positron emission tomography (PET), a subject is given a dose of a positron-emitting radionuclide attached to a metabolically active substance (for example, 2-fluoro-2-deoxy-D-glucose (FDG), which is similar to a naturally occurring sugar, glucose, with the addition of a radioactive fluorine atom). When living tissue containing the positron emitter is bombarded by electrons, gamma radiation produced by collisions of electrons and positrons is detected by a scanner, revealing in fine detail the tissue location of the metabolically-active substance administered./CDISC Definition: An imaging technique for measuring the gamma radiation produced by collisions of electrons and positrons (anti-electrons) within living tissue. In positron emission tomography (PET), a subject is given a dose of a positron-emitting radionuclide attached to a metabolically active substance. A scanner reveals the tissue location of the metabolically-active substance administered./NCI-GLOSS Definition: 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 more glucose than normal cells, the pictures can be used to find cancer cells in the body.//A method of examining structures within the body by scanning them with X rays and using a computer to construct a series of cross-sectional scans along a single axis./NCI-GLOSS Definition: A series of detailed pictures of areas inside the body; the pictures are created by a computer linked to an x-ray machine./CDISC Definition: An imaging technique for examining structures within the body by scanning them with X rays and using a computer to construct a series of cross-sectional scans along a single axis.
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