Acronyms Acronym Definition AD  Alzheimer’s disease  FDOPA  3,4-dihydroxy-6-[18F]fluoro-phenylalanine  DOTA  1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid  FLT  [18]F-3'-deoxy-3'-fluorothymidine   2 of 2