POSITRON EMISSION TOMOGRAPHY


Meaning of POSITRON EMISSION TOMOGRAPHY in English

Imaging technique used in diagnosis and biomedical research.

A chemical compound labeled with a radioactive isotope (see radioactivity ) that emits positron s is injected into the body, and detectors measure their activity in the tissues as they combine with electron s 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.

Britannica Concise Encyclopedia.      Краткая энциклопедия Британика.