利用电离室阵列验证并校准加速器MLC叶片到位精度  

Verification and calibration of leaf position of a multi-leaf collimator by ionization chamber arrays

作　　者：黄焱秋[1] 邱凌平[1] 周春骏[1] 

机构地区：[1]南昌大学第一附属医院肿瘤科,330006

出　　处：《中华放射肿瘤学杂志》2016年第3期279-281,共3页Chinese Journal of Radiation Oncology

摘　　要：目的对直线加速器的MLC叶片到位精度进行验证和精确调整。方法使用IBA公司的StarTrack电离室阵列测量医科达直线加速器Precise的MLC叶片到位精度，对超出精度许可范围叶片进行精确调整。结果对MLC叶片调整后，拍摄其offset位置的验证胶片，分析表明MLC叶片到位精确。结论通过此方法对直线加速器MLC到位精度进行测量和校准．简单方便，满足直线加速器对MLC到位精度要求。Objective To verify and adjust the leaf position accuracy of a muhi-leaf collimator （MLC） in a linear accelerator. Methods Ionization chamber arrays （StarTrack, IBA） were used to measure the leaf position accuracy of a MLC in a linear accelerator （ Precise, ELEKTA） and adjust the leaves out of tolerance. Results After the adjustment of leaf position of the MLC, the analysis of the verification films taken at the offset position showed that the leaf position of the MLC was accurate. Conclusions The method developed in this study is convenient and simple for measurement and calibration of leaf position of the MLC in the linear accelerator, which meets the MLC position accuracy requirement for the linear accelerator.

关 键 词：MLC 精度 校准 电离室 

分 类 号：R730.55[医药卫生—肿瘤]