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PET CT
Positron emission tomography, also called PET imaging or a PET scan, is a diagnostic examination that acquires physiologic images based on the detection of radiation from the emission of positrons. Positrons are tiny particles emitted from a radioactive substance administered to the patient. The resulting images of the human body developed with this technique are used to evaluate a variety of diseases. Modern PET scanners are paired with a CT scanner. The two technologies use sophisticated computer systems to evaluate both the structure and functions of the body.
PET/CT scans are used most often to detect and evaluate the stages of cancers and to examine the effects of cancer therapy by characterizing biochemical changes in the cancer. These scans can be performed on the whole body.
