RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP E31 OP E31 DO 10.3174/ajnr.A3008 VO 33 IS 2 A1 Niggemann, P. A1 Seifert, M. A1 Förg, A. A1 Schild, H.H. A1 Urbach, H. A1 Krings, T. YR 2012 UL http://www.ajnr.org/content/33/2/E31.abstract AB