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PET SCAN

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.