RT Journal Article SR Electronic T1 REPLY JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 610 OP 612 VO 21 IS 3 A1 Watters, Michael R. A1 Stears, John C. A1 Yuh, William T.C. A1 Burton, Bradford S. A1 Osborn, Anne G. YR 2000 UL http://www.ajnr.org/content/21/3/610.abstract AB