目前国外普遍应用立体定位仪作脑组织间插植术,但是国内放疗中心尚未普及使用立体定位仪。本文介绍应用同位素及CT扫描设备行脑组织间插植定位技术。具体步骤如下: 1.确定靶区投影范围:病人剃发后,头部固定于扫描床,注射同位素~(99)Tc-GH后1小时左右行脑扫描,根据扫描图上的浓集区划出肿瘤轮廓,并且 At present, stereotaxic instruments are commonly used in foreign countries for inter-brain implantation. However, stereotaxic instruments have not been widely used in domestic radiotherapy centers. This article describes the application of isotope and CT scanning equipment for inter-brain placement. The specific steps are as follows: 1. Determine the projection range of the target area: After the patient shaves his head, the head is fixed on the scanning bed. Brain scan is performed about 1 hour after the injection of isotope ~(99)Tc-GH. The area is divided according to the concentration range on the scanogram. Tumor contours, and