Single-photon emission tomography/computed tomography (SPECT/CT); is a diagnostic imaging technique that provides functional information from SPECT and anatomical information from CT. Besides many other indications, SPECT/CT is used in the planning of medical treatment, surgical treatment, and internal/ external radiotherapy. In this review, we presented the role of SPECT/CT in the planning of radiotherapy and medical/surgical treatment

It is a nuclear imaging scan that combines computed tomography with radioactive material and a gamma camera. SPECT scan is an imaging test that shows how blood reaches tissues and organs, as well as detecting strokes, stress fractures, infections, and tumors.

Before the SPECT scan, a radioactive tracer is injected into the bloodstream. Typically, iodine-123, technetium-99m, xenon-133, thallium-201, and fluorine-18 are used as radioactive tracers of spect scans. Tracers used in SPECT scans are not absorbed by tissues, unlike those used in PET scans. It stays in the bloodstream. This radioactive tracer, injected into the bloodstream, emits gamma rays that are detected by the gamma camera. These images obtained by gamma camera are combined with tomographic images and the desired image is obtained.