This study is being done to examine the usefulness of Positron Emission Tomography (PET) imaging with florbetapir F 18 as a biomarker in the identification of amyloid-ß peptide (Aß) in the brain. Amyloid-ß peptide (Aß) accumulates in the brains of patients with Alzheimer's disease. Florbetapir F 18 sticks to the amyloid plaques in the brain and emits a low level of gamma rays which can be detected by a PET camera. The development of biomarker and imaging studies that track the development of PPA and reflect the change in people's bodies may help other people who have a similar medical problem in the future.
The purpose of this research is to better understand how dementia affects activity in different parts of the brain.