SPECT
Also written as: SPECT — Single-Photon Emission Computed Tomography
A nuclear imaging technique that uses gamma rays to create three-dimensional images of myocardial perfusion and function.
Full Definition
Single-Photon Emission Computed Tomography (SPECT) is a nuclear imaging modality that detects gamma rays emitted by radioactive tracers to create cross-sectional images of the heart. In cardiac applications, SPECT is primarily used to assess myocardial perfusion, viability, and ventricular function. The technique involves injecting radiopharmaceuticals such as technetium-99m sestamibi or thallium-201, which are taken up by viable myocardium in proportion to blood flow. SPECT imaging is often combined with stress testing to detect coronary artery disease and evaluate treatment effectiveness.
Usage
Usage note: Always capitalize as SPECT when used as an acronym; lowercase when spelling out the full form.
In Context
- "The patient underwent stress SPECT imaging to evaluate for inducible ischemia." — Cardiology consultation note
- "SPECT perfusion imaging revealed a fixed defect in the inferior wall consistent with prior infarction." — Nuclear cardiology report