摘要
准确的计划靶区(Planning Target Vlume,PTV)是精确放疗的关键。在乳腺癌放疗中,摆位误差和呼吸运动是构建PTV的主要因素,其引起靶区位移给PTV的确定带来困扰。本文对PTV的作用、外扩边界的组成、边界位移的各种测量方法、测量存在的不足以及影响位移误差等因素进行综述。并对测量的数据进行总结分析,为精准放疗的PTV构建提供参考。通过对摆位误差和呼吸运动的研究,进而避免靶区漏照和正常组织过照,对乳腺癌术后的精准放疗具有重要的意义。
Accurate planning target vlume(PTV)is the key to precise radiotherapy.In radiotherapy for breast cancer,positioning errors and breathing movement are the main factors for constructing PTV,which cause target location shift and bring trouble to the determination of PTV.This paper reviewed the function of PTV,the composition of the expanded boundary,various measurement methods of boundary displacement,the shortcomings of measurement and the factors affecting the displacement errors,and summarized measured data to provide reference for the PTV construction of precision radiotherapy.Through the study on setup errors and breathing movement,it can avoid missing target volume and radiation overdose of normal structure,which is of great significance for precise radiotherapy after breast cancer operation.
作者
林荫光
黄向炼
苏鑫
陈志柳
龙伟民
陈森
LIN Yinguang;HUANG Xianglian;SU Xin;CHEN Zhiliu;LONG Weimin;CHEN Sen(Department of Radiotherapy,Nanxishan Hospital of Guangxi Zhuang Autonomous Region,Guilin Guangxi 541000,China)
出处
《中国医疗设备》
2021年第9期159-162,共4页
China Medical Devices
基金
广西壮族自治区卫生健康委员会自筹经费科研课题(Z20201407)。
关键词
精确放疗
计划靶区
摆位误差
呼吸运动
乳腺癌术后
precise radiotherapy
planned target area
positioning error
respiratory movement
postoperative breast cancer
