Positron Emission Tomography Positron emission tomography (procedure) 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. OORO positron emission tomography scan PET Scan CDISC C17007 PCDC PET scan mCode C0032743 PET proton magnetic resonance spectroscopic imaging Diagnostic Procedure PET SCAN Positron Emission Tomography Positron Emission Tomography 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. Positron Emission Tomography Positron-Emission Tomography Positron_Emission_Tomography PT GDC PET CTRP Medical Imaging, Positron Emission Tomography Positron Emission Tomography Scan Pet Scan 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. Imaging Technique