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 D R Enzmann A1 K M Irwin A1 W H Marshall A1 G D Silverberg A1 R H Britt A1 J W Hanbery 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.