Different colors or degrees of brightness on the images from a PET scan represent different levels of tissue and organ function. A radiologist with special training in reading PET scans interprets the images.

Images from other tests, such as those from recent computerized tomography (CT) or magnetic resonance imaging (MRI), may be compared or even combined with those of your PET scan. Some hospitals have a machine that can take a PET scan and a CT scan at the same time. The resulting images often provide greater clarity.

May. 07, 2011