甘肃医药2026，Vol.45Issue(4)：322-326,5.DOI:10.15975/j.cnki.1004-2725.2026.04.008
肺癌脑转移瘤立体定向放射治疗中两种不同体位固定方式误差分析
Error analysis of two different positioning fixation methods in stereotactic radiotherapy for brain metastases from lung cancer
摘要
Abstract
Objective:This study aimed to compare the precision differences between the individualized Fraxion patient positioning and fixation technique and the positioning and fixation technique combining a shaping pad with a thermoplastic film in stereotactic radiotherapy for brain metastases from lung cancer.Methods:A total of 39 patients with lung cancer brain metastases who met the indications for stereotactic cranial radiotherapy and were admitted to the Department of Radiation Oncology,Gansu Provincial Cancer Hospital from January to December 2024 were selected.The patients were randomly divided into two groups.Nineteen patients were fixed using the individualized Fraxion position-ing technique,while the remaining 20 patients were fixed with the combination of a shaping pad and a thermoplastic film.Two sets of setup error data were collected using an Elekta-infinity medical linear accelerator,and statistical analysis was conducted.Results:There were no statisti-cally significant differences in the three-dimensional translational errors and rotational errors between the two fixation methods.However,the overall setup errors in the Fraxion group were smaller:both the absolute translational errors and rotational errors were lower than those in the shaping pad group,and the expansion margin of the target volume in the Y-axis direction was significantly reduced.Conclusions:Both the in-dividualized Fraxion positioning and fixation technique and the shaping pad combined with thermoplastic film fixation technique can meet the requirements for target volume precision and repeatability in SRT for brain metastases from lung cancer,and thus have clinical application val-ue.Among them,the Fraxion positioning and fixation technique has greater advantages in controlling multi-dimensional translational errors and rotational errors,and can reduce the expansion margin of the target volume in the Y-axis direction,providing more support for improving treat-ment precision.关键词
肺癌脑转移瘤/立体定向放射治疗/体位固定/误差分析Key words
brain metastases from lung cancer/stereotactic radiotherapy/patient positioning and fixation/error analysis分类
医药卫生引用本文复制引用
牛瑞军,魏世鸿,王帮才,张建刚,陈延俊,陶娜,刘婷婷,贾怀琳,魏玺仪,朱公建..肺癌脑转移瘤立体定向放射治疗中两种不同体位固定方式误差分析[J].甘肃医药,2026,45(4):322-326,5.基金项目
1.兰州市科技计划项目(编号:2023-ZD-54) （编号:2023-ZD-54）
2.兰州市人才创新创业项目(编号:2023-2-90) （编号:2023-2-90）
3.中华国际医学交流基金会肿瘤精准放疗星火计划(编号:2019-N-11-17) （编号:2019-N-11-17）
