由Leksell及同事在立体定向手术基础上发展起来的伽玛刀。近年来人们已认识到它是一种新型手术技术,现就这一技术简介如下。一、伽玛刀的结构及原理 伽玛刀设备是由γ射线源、滑动床和准直器三大部件组成,总重18000kg,附设立体定向仪,电子计算机,液压辅助起动装置等,又称Gamma Unit。准直器为一很重的不锈钢半球体,上设有201个直径 Gamma Knife developed on the basis of stereotactic surgery by Leksell and colleagues. In recent years, people have recognized that it is a new surgical technique, the technical profile is now as follows. First, the structure and principle of gamma knife Gamma knife device is a gamma ray source, sliding bed and collimator composed of three major components, total weight 18000kg, attached stereotactic instrument, electronic computer, hydraulic auxiliary starting device, also known as Gamma Unit. The collimator is a heavy stainless steel hemisphere with 201 diameters