RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E12 OP E12 DO 10.3174/ajnr.A3452 VO 34 IS 1 A1 W. Pope YR 2013 UL http://www.ajnr.org/content/34/1/E12.abstract AB