SPECT, or Single Photon Emission Computed Tomography, is a medical imaging technique that helps doctors see how blood flows to tissues and organs. It uses a small amount of radioactive material, which is injected into the body. This material emits gamma rays, and a special camera captures these rays to create detailed images of the inside of the body. SPECT is often used to assess conditions like heart disease and brain disorders. The images produced by SPECT can show areas of reduced blood flow, helping doctors diagnose problems early. This technique is particularly useful in evaluating the function of the heart and detecting issues such as tumors or strokes.