X-刀治疗计划验证及误差分析

Error Analysis of X—knife Treatment Plan

目的:探讨应用放射治疗模拟机对X-刀治疗计划验证的可行性,并分析报道X-刀治疗计划中的误差,以供借鉴。方法:应用放射治疗模拟定位机对372例X-刀治疗计划的照射野进行治疗模拟,观察计划等中心与实际预照射等中心吻合度。结果:在治疗模拟中发现总误差率为5.9%(22/372),值得注意的是:3例X-刀治疗计划照射野等中心Z方向误差10 cm。结论:这是X-刀治疗计划系统中的一种特殊误差,在立体定向放射治疗中值得注意。

Objective To investigate the probability of verifying the X-knife treatment plan by the radiotherapy simulator, and to analyze and report the errors of the X-knife treatment plan for reference. Methods The radiation fields of the X- knife treatment plan were observed in the whole simulating treatment process by the radiotherapy simulator. Results The error rate of X-knife treatment plan were in the simulating treatment process was 5.9% （22/372）. Among the errors, 3 cases of X-knife plans were found in the simulating treatment process, and the errors of isocenter in Z direction were 10cm. Conclusion This is a special error of X-knife TPS, which deserves more attention in stereotactic radiotherapy.