PET is a type of diagnostic imaging procedure used in nuclear medicine. A PET exam records the radiotracer collected in organs and body tissues which is previously administered and that acts as dye (contrast). The Fluorine-18 glucose labelled radiotracer is the most widely used.
A PET exam allows physicians to assess how affected are diseased organs and tissues. Nowadays, it is often used to evaluate cancer and the body area affected. Frequently this procedure and a CT exam are done at once and sometimes contrast material is administered for this CT scan. Images collected from CT and PET exams are helpful to better locate the areas where glucose concentrates, i.e. the area where the disease may be found. Nuclear medicine specialists and radiologists interpret PET and CT images, regardless if these are used jointly (“fused images”) o separately.