二维电离室矩阵在调强放射治疗中的剂量验证

二维电离室矩阵在调强放射治疗中的剂量验证

屈伟强;汪延明;赵惠;赵鹏;石乐乐;聂鲁栋

【期刊名称】《现代肿瘤医学》 【年(卷),期】2014(000)010

【摘要】目的：对逆向调强计划进行剂量学验证，保证IMRT计划临床实施的正确性。方法：利用ELEKTA precise直线加速器6MV X线，对pinnacle治疗计划系统设计的调强治疗计划。采用PTW公司的729二维电离室矩阵进行平面剂量的验证。结果：平面剂量验证采用Gamma分析（3%/3mm），结果是计划的测量点通过率均>95%。结论：实际测量的剂量分布与计划计算的剂量分布符合的相当理想，可用于临床治疗。%Objective:To research the method of dosimetric verification of the intensity modulated radiation thera-py(IMRT),guarantee the correction of IMRT plans clinical implementation. Methods:The IMRT treatment plans were designed by pinnacle and were implemented in ELEKTA precise with 6MV X-ray. The plans dose distributions were measured using PTW 2D-Array ion chamber in the phantom. Results:The points passed ratio was more than 95% in gamma analysis method(3mm/3%)about the plan dose distribution verification. Conclusion:The method can be used in clinical treatment because the dose distribution of the actual measurement and plan calculation is quite ideal match. 【总页数】3页(2444-2446)

【关键词】调强放射治疗;剂量学验证;二维电离室矩阵