RT Journal Article SR Electronic T1 Heart of Darkness JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1629 OP 1630 DO 10.3174/ajnr.A2976 VO 33 IS 9 A1 M. Castillo YR 2012 UL http://www.ajnr.org/content/33/9/1629.abstract AB