SPECT scan
Pronunciation: spekt skan
Single photon emission computed tomography imaging that measures cerebral blood flow and brain function.
Full Definition
Single Photon Emission Computed Tomography (SPECT) is a nuclear imaging technique that uses gamma-emitting radiopharmaceuticals to assess cerebral blood flow and regional brain function. Common tracers include technetium-99m HMPAO for perfusion studies and DaTscan for dopamine transporter imaging. SPECT provides functional information about brain activity and is particularly valuable in evaluating dementia, movement disorders, epilepsy, and psychiatric conditions. Unlike PET, SPECT uses longer-lived isotopes and is more widely available, though it offers lower spatial resolution.
Usage
Usage note: Specify tracer used and clinical indication; distinguish from PET imaging which uses different isotopes.
In Context
- "Brain SPECT scan demonstrated decreased perfusion in the right frontal lobe." — Nuclear medicine imaging report
- "DaTscan SPECT revealed reduced dopamine transporter binding in the putamen." — Movement disorder evaluation