SPECT imaging, or Single Photon Emission Computed Tomography, is a medical imaging technique that provides detailed pictures of blood flow and activity in the body. It uses a small amount of radioactive material, which is injected into the patient. This material emits gamma rays that are detected by a special camera, creating images that help doctors assess various conditions, particularly in the heart and brain. The images produced by SPECT can reveal how well organs are functioning and can help diagnose diseases such as cancer, heart disease, and neurological disorders. SPECT is often used in conjunction with other imaging techniques, like CT scans or MRI, to provide a more comprehensive view of a patient's health.