Emissions from the radionuclide indicate amounts of blood flow in the capillaries of the imaged regions. Instead of just "taking a picture of anatomical structures", a SPECT scan monitors level of biological activity at each place in the 3-D region analyzed. This marriage allows the combination of ligand and radiopharmaceutical to be carried and bound to a place of interest in the body, where the ligand concentration is seen by a gamma camera.Ī Siemens brand SPECT scanner, consisting of two gamma cameras. Most of the time, though, a marker radioisotope is attached to a specific ligand to create a radioligand, whose properties bind it to certain types of tissues. On occasion, the radioisotope is a simple soluble dissolved ion, such as an isotope of gallium(III). The technique needs delivery of a gamma-emitting radioisotope (a radionuclide) into the patient, normally through injection into the bloodstream. ![]() This information is typically presented as cross-sectional slices through the patient, but can be freely reformatted or manipulated as required. It is very similar to conventional nuclear medicine planar imaging using a gamma camera (that is, scintigraphy), but is able to provide true 3D information. ![]() ![]() Single-photon emission computed tomography ( SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. Collimator used to collimate gamma rays (red arrows) in a gamma camera
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