RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A3008 A1 Pascal Niggemann A1 Mirko Seifert A1 Andreas Förg A1 Hans H. Schild A1 Horst Urbach A1 Timo Krings YR 2012 UL http://www.ajnr.org/content/early/2012/01/26/ajnr.A3008.abstract AB