摘要
目的:研究不同规格准直器对剂量分布和治疗时间的影响,为射波刀治疗计划设计中准直器的选择提供参考和指导。方法:分别使用12种规格的准直器对3个大小不同的肿瘤靶区进行计划设计,得出每个靶区在不同准直器下对应的剂量分布和治疗时间,并分析其存在的关系。结果:随着准直器尺寸的增加,治疗时间变得越来越少;当准直器尺寸远大于靶区时,剂量分布随准直器尺寸增加变得越好,但是正常组织受到的照射剂量越多。结论:在治疗计划设计中准直器尺寸的选择应比肿瘤尺寸略小,约占肿瘤直径的2/3,准直器的选择可为肿瘤治疗提供参考依据,并具有重要的指导意义。
Objective：To study the effect of different sizes of collimators on dose distribution and treatment time, and provide the reference of selecting collimators for planning design. Methods：To design the planning by using collimators with 12 kinds of size for three different size tumors, and analysis the dose distribution and treatment time of planning with different collimators. Results：The treatment time is becoming less and less with increasing of the collimator size;the dose distribution becomes better and better when collimator size becomes large, but the dose of the normal tissue becomes more. Conclusion： The selection of collimator size may be smaller than tumor size by analyzing the results of three groups, and about 2/3 of tumor diameter, which provides important reference and guidance significance for designing the treatment planning with choosing collimators.
出处
《中国医学装备》
2015年第10期39-42,共4页
China Medical Equipment
关键词
射波刀
准直器
剂量分布
CyberKnife
Collimator
Dose distribution
