RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E42 OP E42 DO 10.3174/ajnr.A2030 VO 31 IS 4 A1 Kallmes, D.F. A1 Cloft, H.J. A1 White, J.B. A1 Ken, C.G.M. YR 2010 UL http://www.ajnr.org/content/31/4/E42.abstract AB