RT Journal Article SR Electronic T1 Central Sulcus Focal Subarachnoid Hemorrhage in the Elderly: Cerebral Amyloid Angiopathy Is the Most Frequent Cause JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E161 OP E161 DO 10.3174/ajnr.A2647 VO 32 IS 8 YR 2011 UL http://www.ajnr.org/content/32/8/E161.abstract AB