A heart PET scan is an imaging tool, offering information on blood flow and heart health. Learn more about how this scan helps with diagnosing heart conditions.

PET scans can light up tumors in the body and help doctors determine if they are cancerous or benign (noncancerous). The results of a PET scan help guide medical decisions.

You can still have cancer if a PET scan is negative. That’s because some types of tumors are harder for PET scans to detect.

PET scans require dietary preparation, sometimes up to 24 hours before your test, so it's important that you know what foods to eat before a PET scan.