P2‐385: BRAIN IMAGING OF VASCULAR DYSFUNCTION AS AN EARLY BIOMARKER OF COGNITIVE DECLINE. (1st July 2019) - Montagne, Axel; Sweeney, Melanie D.; Sagare, Abhay P.; Nation, Daniel A.; Harrington, Michael G.; Chui, Helena C.; Law, Meng; Toga, Arthur W.; Zlokovic, Berislav V.