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 ...

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 of patients with early Alzheimer’s disease showed that binding of a marker of tau protein correlated to regions of atrophy in the brain (colored areas). [R. La Joie et al., Science ...

Medicare may cover positron emission tomography (PET) scans. If you have a PET scan as an inpatient, Part A will typically cover costs. If you are an outpatient, Part B will cover eligible expenses.

Medicare Part B covers outpatient PET scans when ordered by a doctor and considered medically necessary. PET scan costs can vary depending on whether you have the scan in a hospital as an inpatient, ...