中文摘要：

针对矩阵剂量仪采用γ指数分析法进行剂量验证（通过率达90%）,仪器对位精度要求需达到0.2 mm的情况,为解决仪器外壳划线与探测器位置中心线对位误差带来了剂量验证误差,采用DR（直接数字化X射线摄影）系统摄像,仪器对位误差达到0.2 mm,保证剂量验证对阵列探测器中心位置与等中心的精确对准要求,剂量验证γ指数通过率达到95%以上。

英文摘要：

The positioning precision instrument is required to reach 0.2 mm in order to satisfy the dose verification（the rate of 90%）with the γ index analysis method. In order to eliminate the error by the position differences between instrument shell marking to detectors, the authors use DR （direct digital X-ray radiography）system camera. It ensures precise alignment requirements for dose verification of detector array center and center that the instrument alignment error achieves the precision of 0.2 mm, and the γ index pass rate of dose verification reached more than 95%.