A PET scan may be done to:help diagnose certain cancerssee how far the cancer has spread (staging)find out if cancer treatment is working or as part of follow-upcheck if cancer has come back (recurred) after treatment or spread to other parts of the bodyhelp diagnose non-cancerous conditions
People also ask
What is a PET scan used to look for?
A positron emission tomography (PET) scan is an advanced nuclear imaging technique used to look for cancer and its spread. PET scanners trace a form of radioactive sugar as it鈥檚 absorbed by your cells. Because cancer cells grow quickly, they take up larger amounts of sugar (glucose) than normal cells.
What happens before a PET scan for cancer?
Before the scan you will have a small amount of mildly radioactive glucose solution injected through a small plastic tube (cannula) in your arm. Cancer cells absorb more of the solution than normal cells and will show up brighter on the scan.
What can a PET scan tell you about metabolism?
The PET scan uses a radioactive drug (tracer) to show both normal and abnormal metabolic activity. A PET scan can often detect the abnormal metabolism of the tracer in diseases before the disease shows up on other imaging tests, such as computerized tomography (CT) and magnetic resonance imaging (MRI).
What diseases can be seen on a PET scan?
1 Cancer. Cancer cells show up as bright spots on PET scans because they have a higher metabolic rate than do normal cells. 2 Heart disease. PET scans can reveal areas of decreased blood flow in the heart. … 3 Brain disorders. PET scans can be used to evaluate certain brain disorders, such as tumors, Alzheimer’s disease and seizures.