PET scans can detect amyloid plaques and tau tangles in the brain, which are often early signs of Alzheimer’s disease. But they’re not enough on their own to make a diagnosis. Alzheimer’s disease is ...

PET scans use a radioactive tracer to generate images of the body for medical analysis. Doctors commonly use PET scans to detect cancer and assess how far it has spread. Radiation exposure from PET ...

Medicare has proposed expanding its coverage of PET scans that are used to help diagnose Alzheimer's disease. The proposal would abolish a nationwide policy that limited the scans to one per lifetime ...

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. A PET scan is a type of ...

A positron emission tomography (PET) scan is an imaging technique that uses small amounts of radioactive substances. Doctors may use PET scans in chemotherapy treatments for cancer. PET scans help ...