RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP e32 OP e32 DO 10.3174/ajnr.A1077 VO 29 IS 5 A1 E.Y. Cho YR 2008 UL http://www.ajnr.org/content/29/5/e32.abstract AB