RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E165 OP E165 DO 10.3174/ajnr.A2688 VO 32 IS 8 A1 Kallmes, D.F. A1 Cloft, H. A1 Daugherty, W.P. A1 Meyers, P.M. YR 2011 UL http://www.ajnr.org/content/32/8/E165.abstract AB