RT Journal Article SR Electronic T1 Digital Subtraction Intravenous Angiography JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 477 OP 478 VO 1 IS 5 A1 T, JM YR 1980 UL http://www.ajnr.org/content/1/5/477.abstract AB