安置立体定向头环是X刀治疗的第 1个环节 ,其位置是否适当将直接影响影像定位质量。近 10年来 ,我院采用自行研制的X刀系统[1] 及德国Leibinger FischerX刀系统共治疗颅内病变 6 86例。现对头环安置体会报告如下。1　临床资料1 1　一般情况　男 376例 ,女 310例 ;年龄 4～ 83岁 Placement of stereotactic head ring is the first part of the X-knife treatment, the location is appropriate will directly affect the quality of image positioning. In the past 10 years, our hospital used a self-developed X-knife system [1] and a German Leibinger FischerX knife system to treat 686 cases of intracranial lesions. Now the first ring resettlement experience report is as follows. 1 Clinical data 1 1 The general situation of 376 males and 310 females; aged 4 to 83 years