positron emission tomography

(redirected from Positron-emission tomography)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Positron-emission tomography: PET scan, magnetic resonance imaging, positron emission tomography (PET) scan

positron emission tomography

n. Abbr. PET
Tomography in which a computer-generated image of local metabolic and physiological functions in tissues is produced through the detection of gamma rays that are emitted when introduced radionuclides decay and release positrons.

positron emission tomography

n
(Medicine) a technique for assessing brain activity and function by recording the emission of positrons from radioactively labelled substances, such as glucose or dopamine

pos′itron emis`sion tomog`raphy


n.
the process of producing a PET scan. Compare PET scanner.

Positron Emission Tomography

(PET scan) A diagnostic method of examining tissues within the brain using a radioactive isotope injected into the bloodstream
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.positron emission tomography - using a computerized radiographic technique to examine the metabolic activity in various tissues (especially in the brain)
tomography, imaging - (medicine) obtaining pictures of the interior of the body
Translations
pozitronová emisní tomografie
References in periodicals archive ?
The primary tools of the trade are positron-emission tomography (PET) and single-photon-emission computed tomography (SPECT) scans, with which scientists can find and measure changes in dopamine and other neurochemicals in the brain.
ALTERED STATES--These positron-emission tomography images show brain areas with unusual metabolic activity in a Parkinson's disease patient.