WordReference Random House Unabridged Dictionary of American English © 2026
PET′ scan′ner,
- Medicine, Laboratorya tomographic imaging device that yields visual information about the ongoing activity of the brain: positron-emitting isotopes, incorporated into biologically important compounds, are injected intravenously or administered by inhalation, and the resultant gamma radiation is sensed by detectors and converted into computer-generated images of blood flow, oxygen utilization, glucose uptake, etc.
'PET scanner' also found in these entries (note: many are not synonyms or translations):