 Alzheimers disease AD is associated with amyloid-related imaging abnormalities ARIA. Microbleeds MBs represent part of the spectrum of ARIA and can be identified as small hypointense lesions on gradient-recalled echo GRE T2-weighted MRI. They are thought to represent hemosiderin deposits and hence have been classified as ARIA-H1 and occur as a consequence of leakage of blood products out of vessels that have been damaged by deposition of the protein β-amyloid in cerebral vessels; cerebral amyloid angiopathy CAA. However, it is also possible that cerebrovascular disease could contribute to the presence of MBs in AD. Subjects with MBs are at a greater risk of bleeds which could impact the use of anti-coagulation treatment approaches. 