Medical Dictionary
positron–emission tomography
noun
Medical Definition of POSITRON-EMISSION TOMOGRAPHY
: tomography in which an in vivo, noninvasive, cross-sectional image of regional metabolism is obtained by a usually color-coded cathode-ray tube representation of the distribution of gamma radiation given off in the collision of electrons in cells with positrons emitted by radionuclides incorporated into metabolic substances—abbreviation PET
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