RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E145 OP E145 DO 10.3174/ajnr.A2641 VO 32 IS 7 A1 H. P. Burmeister YR 2011 UL http://www.ajnr.org/content/32/7/E145.abstract AB