RT Journal Article SR Electronic T1 Validation of transcranial Doppler ultrasound with an in vivo stereotactic technique. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1349 OP 1350 VO 15 IS 7 A1 A Y Razumovsky A1 L H Monsein A1 S J Ackerman A1 H J Nauta A1 D F Hanley YR 1994 UL http://www.ajnr.org/content/15/7/1349.abstract AB