目的：通过比较前列腺癌调强放疗剂量验证的结果，评价不同子野数的治疗计划临床治疗的准确性。方法选取OMP治疗计划系统中7例前列腺癌调强治疗计划，保持其他优化目标不变，分别生成30～50，50～70，70～100这3个子野计划，比较这3个计划的Gamma通过率。结果这3个不同子野数计划在3 mm/3%、3 mm/5%阈值下的Gamma通过率都大于90%。结论研究所用这3个不同子野数的计划均能用于临床治疗，且子野数越少，计划的通过率越高。%Objective To evaluate the accuracy of clinical treatment for the treatment of different numbers of sub fields by comparing the verification results of radiation dose in prostate cancers.Methods 7 prostate cancer patients who were treated with the intensity modulated treatment plan were selected from the OMP treatment planning system, and the other optimization objectives were kept unchanged. Three sub ifeld plans (30~50, 50~70, 70~100) were generated respectively to compare the pass rate of Gamma.Results The pass rates of Gamma with three different sub ifelds under the threshold 3 mm/3%and 3 mm/5% were more than 90%.Conclusion Three different numbers of sub ifelds could all be used in clinical treatment, and the fewer the number of sub ifelds, the higher the rate of the plan.
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