RT Journal Article SR Electronic T1 Three-Dimensional Power Doppler Imaging of Vertebrobasilar Circulation in Adults JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 943 OP 944 VO 20 IS 5 A1 Mastoshi Koga A1 Kazumi Kimura A1 Masahiro Yasaka A1 Ryoichi Otsubo A1 Yasuhiro Hasegawa A1 Kazuo Minematsu A1 Takenori Yamaguchi YR 1999 UL http://www.ajnr.org/content/20/5/943.abstract AB