RT Journal Article SR Electronic T1 Frontal Bone Window Improves the Ability of Transcranial Color-Coded Sonography to Visualize the Anterior Cerebral Artery of Asian Patients with Stroke JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology DO 10.3174/ajnr.A1452 A1 S. Yoshimura A1 M. Koga A1 K. Toyoda A1 T. Mukai A1 B.-H. Hyun A1 M. Naganuma A1 K. Nagatsuka A1 K. Minematsu YR 2009 UL http://www.ajnr.org/content/early/2009/02/12/ajnr.A1452.abstract AB