热疗用金属热籽对放疗剂量的影响  

Impact of metal thermoseeds on radiation dose distribution

作　　者：王晖[1] 鲁旭尉[1] 刘珈[1] 向舫[1] 曾彪[1] 唐劲天[2] 

机构地区：[1]湖南省肿瘤医院放疗科,长沙410013 [2]清华大学医学物理与工程研究所

出　　处：《中华放射肿瘤学杂志》2010年第2期145-148,共4页Chinese Journal of Radiation Oncology

基　　金：湖南省卫生厅基金资助项目（B2007-154）

摘　　要：目的研究磁感应热疗所用于体内的金属热籽在植入机体后对放疗剂量分布产生的影响。方法使用放疗人体仿真模型及三维治疗计划系统，通过模拟照射评估用于磁感应热疗的金属植入物处于放疗条件下对剂量分布的影响。结果所植入的金属棒热籽材料对人体仿真组织的吸收剂量影响≤1．5％。结论由于在组织中所植入的铁磁热籽对吸收剂量的影响很小，符合靶区剂量总不确定度〈5％的要求，因此，在临床放疗处理中可以忽略不考虑其对组织的影响。Objective To study the impact of implanted thermoseeds of magnetic induction hyperthermia on radiation dose distribution. Methods To simulate irradiation, an anthropomorphic phantom and three-dimensional treatment planning system were used. The impact of thermoseeds on radiation dose distribution was evaluated, Results The change of absorbed dose caused by the implantated thermoseeds was less than 1.5%. Conclusions The impact of implanted thermoseeds on radiation dose distribution is small and comes up to the requirements that the total target dose uncertainty must be less than 5%. Therefore, the impact of thermoseeds on the absorbed dose in tissue can be ignored in clinical practice.

关 键 词：热疗 磁感应 热籽 金属 放射疗法 剂量 

分 类 号：R686[医药卫生—骨科学]