A radiotherapy orientated 3D CT Sim consisted a SCT 6800TX spiral CT,a laser alignment system and Focus Dusimulator. From February 10, 1999 to October 28,1999,CT simulation and treatment planning of 143 patients were performed on this system.

• [方法]将螺旋CT,三维激光定位系统和Focus9200三维计划系统通过网络连接 ,形成放疗科专用的 ,集影像诊断 ,图像传送 ,肿瘤定位和三维计划为一体的三维CT模拟定位计划系统。