[IC‐P‐042]: COMPARISON OF BASELINE ARIA‐H PREVALENCE AT 1.5T AND 3T MRI FIELD STRENGTHS IN A MULTI‐SITE GLOBAL CLINICAL TRIAL WITH A COHORT OF 2, 137 AD SUBJECTS. (1st July 2017) - Schwarz, Adam J.; Oh, Joonmi; Barakos, Jerome; Bracoud, Luc; Scott, David; Suhy, Joyce; Carlson, Christopher D.; Siemers, Eric R.