RT Journal Article SR Electronic T1 Intraoperative sonography through a burr hole: guide for brain biopsy. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 243 OP 246 VO 5 IS 3 A1 Enzmann, D R A1 Irwin, K M A1 Marshall, W H A1 Silverberg, G D A1 Britt, R H A1 Hanbery, J W YR 1984 UL http://www.ajnr.org/content/5/3/243.abstract AB Sonographic imaging of the brain was accomplished through a burr hole using a small, real-time, 5 MHz transducer in five patients. Brain tumors were accurately imaged, corresponding closely in morphology to the computed tomographic scan. Intraoperative sonography through a burr hole allows flexibility in technique and greatly facilitates brain biopsy procedures.