Positron Emission Tomography (PET) is used to measure amyloid plaques in the brain. Amyloid plaques are one of the hallmarks of the pathology of Alzheimer’s disease.
What is involved?
- A small amount of radioactive chemical (tracer) is injected into a vein in the arm.
- About 20 minutes later, a scan of the brain is taken. This involves lying still in a CAT scanner for about 10 minutes.