Procedure Guideline for SPECT/CT Imaging 1.0*

The purpose of this Procedure Guideline is to assist physicians in recommending, performing, interpreting, and reporting the results of SPECT/CT for imaging of adult and pediatric patients. II. BACKGROUND INFORMATION AND DEFINITIONS SPECT is a tomographic scintigraphic technique in which a computer-generated image of local radioactive tracer distribution in tissues is produced through the detection of single-photon emissions from radionuclides introduced into the body. CT is a tomographic imaging technique that uses an external x-ray source to produce 3-dimensional anatomic image data. The first SPECT/CT system combined a dual-head g-camera and an integrated x-ray transmission system mounted on the same gantry. The CT image is used for at-tenuation correction as well as anatomic imaging, and th