RT Journal Article SR Electronic T1 Identification of the Distal Dural Ring with Use of Fusion Images with 3D-MR Cisternography and MR Angiography: Application to Paraclinoid Aneurysms JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A1440 A1 Y. Watanabe A1 T. Nakazawa A1 N. Yamada A1 M. Higashi A1 T. Hishikawa A1 S. Miyamoto A1 H. Naito YR 2009 UL http://www.ajnr.org/content/early/2009/01/15/ajnr.A1440.abstract AB