摘要
目的:探讨肝癌三维适形放射治疗照射野的设计方法。方法:利用上海拓能(Topslane)公司的三维治疗计划系统对112例肝癌患者,根据医生要求的CTV和周围的敏感器官限制受量,进行三维适形放射治疗计划设计,结合剂量曲线分布情况和剂量体积直方图(DVH)选择最佳治疗方案。结果:以肿瘤中心点为剂量归一点,80%～90%的剂量线均能包绕靶区体积,而周围正常组织受量都在理想的范围内。结论:对肝癌的三维治疗计划设计时,要根据病人不同的病变部位采取不同的设野方法,这样能使靶区剂量分布均匀,适形度好,同时也有效地保护了敏感器官,从而提高肿瘤剂量及肿瘤局部控制率。
Objective ：To observe the field designing methods in 3 -dimensional conformal radiation therapy （3D -CRT） for liver cancer. Methods. According to the limits of the CTV and neighbor sensitive organs＇absorbed dose to make 3D - CRT plans for 112 liver cancer patients by using Topslaneg 3 - dimensional therapy plan system（ TPS）, and optimize the therapy scheme base on the dose curves and the dose -volume histogram（DVH）. Results： To take the tumor＇s center as the dose unitary point, target region was surrounded by 80% -90% dose lines and the normal organs＇absorbed dose was in desirable range. Conclusion： To plan a 3D -CRT for the liver cancer shonld adopt ap- propriate field design methods according to patients＇pathological changes position sensitive organs can be protected effectively, so can improve the tumorg absorbed dose and local control rate.
出处
《现代肿瘤医学》
CAS
2008年第1期77-79,共3页
Journal of Modern Oncology
关键词
肝癌
三维适形放疗
照射野设计
liver cancer
3 - dimensional conformal radiation therapy
field design
