Cancer Terms

Positron Emission Tomography

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Positron Emission Tomography 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.

Positron Emission Tomography Synonyms

Positron Emission Tomography, FDG-PET, Medical Imaging, Positron Emission Tomography, PET, PET Scan, PET scan, Positron Emission Tomography Scan, Positron-Emission Tomography, positron emission tomography scan, proton magnetic resonance spectroscopic imaging

Terms in Positron Emission Tomography category



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