RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A2629 A1 J. Hom A1 M. Wintermark YR 2011 UL http://www.ajnr.org/content/early/2011/04/21/ajnr.A2629.abstract AB