Positron emission tomography, also called a PET scan, is an examination that involves producing 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 subsequent views of the human body developed by PET are used to evaluate a variety of diseases.
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PET is usually done on an outpatient basis. You should:
Patients undergo PET because their referring physician has recommended it. A radiologist who has specialized training in PET will interpret the images and forward a report to your referring physician. It usually takes one to three days to interpret, report, and deliver the results. In order to facilitate interpretation, you may be asked to bring any outside examinations with you, such as recent CT (CAT) scans or MRI scans.
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