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.A2512 A1 O. Naggara A1 J.-F. Meder A1 C. Oppenheim YR 2011 UL http://www.ajnr.org/content/early/2011/04/07/ajnr.A2512.abstract AB