RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP e95 OP e95 DO 10.3174/ajnr.A1174 VO 29 IS 10 A1 Schievink, W.I. YR 2008 UL http://www.ajnr.org/content/29/10/e95.abstract AB