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.A1491 A1 J.M. Isokangas A1 T. Siniluoto A1 T. Kumpulainen A1 T. Tikkakoski YR 2009 UL http://www.ajnr.org/content/early/2009/02/12/ajnr.A1491.abstract AB