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positron emission tomography
(redirected from Positron emission tomograph)

    Also found in: Medical, Wikipedia, Hutchinson 0.01 sec.
positron emission tomography: see PET scan PET scan (pĕt) or positron emission tomography
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positron emission tomography (PET)

Imaging technique used in diagnosis and biomedical research. A chemical compound labeled with a radioactive isotope (see radioactivity) that emits positrons is injected into the body, and detectors measure their activity in the tissues as they combine with electrons 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.
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