P3‐438: PARAMETRIC IMAGING OF [18F]FLORBETAPIR: A TEST‐RETEST STUDY IN HEALTHY SUBJECTS AND PATIENTS WITH ALZHEIMER'S DISEASE - Verfaillie, Sander C.J.; Golla, Sandeep S.V.; Weijden, Chris W.J.; Timmers, Tessa; Schober, Patrick; Schuit, Robert C.; Windhorst, Albert D.; Scheltens, Philip; Flier, Wiesje M.; Lammertsma, Adriaan A.; Berckel, Bart N.M.; Boellaard, Ronald (Alzheimer's & dementia, 2018)