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摸拟定位机是对钴,医用加速器的放疗条件下的摸拟定位,是放疗前进行照射野设计选优的重要工具。我们自1987年5月～1988年9月用摸拟定位机进行了食管癌偏移测算,结果如下: 1 资料与方法:本组306例食管癌中,上段90例、中段138例、下段78例。摸拟定位机是天津产FM-Ⅱ型。 1.1 体位:患者仰卧于摸拟定位机上,头不垫枕,两肩水平对称,两上肢置于身旁,两腿平伸。 1.2 测量方法:在控制室通过电视屏幕
The simulated positioner is a simulated positioning of cobalt and medical accelerators under radiotherapy conditions. It is an important tool for selecting and optimizing the irradiation field before radiotherapy. From May 1987 to September 1988, we measured the esophageal cancer migration using a simulated positioning machine. The results were as follows: 1 Materials and Methods: Among the 306 cases of esophageal cancer in this group, 90 were in the upper segment, 138 were in the middle segment, and 78 were in the lower segment. example. The simulation positioning machine is produced in Tianjin FM-II type. 1.1 Position: The patient is supine on the simulated positioning machine. The head is not cushioned. The shoulders are horizontally symmetrical. The two upper limbs are placed next to each other and the two legs stretch out. 1.2 Measurement method: in the control room through the TV screen