Methods Between January 1991 and December 1997, CT or MRI-guided stereotactic biopsies were performed in 420 patients with intracerebral lesions which were deeply located in brain func- tional area.

• 方法 采用计算机体层摄影（CT）或磁共振成像（MRI）引导立体定向技术对420例脑深部或脑主要功能区病灶进行了活检手术。