SPECT Scan
Single-Photon Emission Computed Tomography (SPECT), a nuclear medicine 3D functional imaging technique using gamma-emitting radioisotopes.
Governing formula
Gamma Camera 3D Tomographic Reconstruction
SI unit
MBq (Activity) & Hounsfield-like Functional Units
In depth
Injects gamma-emitting radiopharmaceuticals (like Technetium-99m). Rotating gamma cameras equipped with lead collimators detect single gamma photons to reconstruct 3D radiotracer distribution images.
Examples in the real world
Technetium-99m sestamibi SPECT myocardial perfusion scans evaluating heart muscle blood flow.