P1‐421: COMPARISON OF STRIATAL LONGITUDINAL CHANGES IN AMYLOID DEPOSITION IN NON‐DEMENTED ELDERLY AND DOWN SYNDROME. (1st July 2006) - Tudorascu, Dana L.; Laymon, Charles M.; Minhas, Davneet S.; Lopresti, Brian J.; Price, Julie C.; Mathis, Chester; Aizenstein, Howard J.; Klunk, William E.; Handen, Benjamin L.; Christian, Brad T.; Cohen, Annie