二维电离室矩阵在调强放射治疗中的剂量验证

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。

Dosimetric verification of the intensity modulated radiation therapy with 2 D -Array ion chamber

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.