Internal Position Error Correction 内部位置误差校核
The star point of the dynamic star simulator's showing grid is measured, and the position error correction factor of each star point is calculated.
利用经纬仪对动态星模拟器显示的网格上的星点进行测量，计算了各星点的位置误差及修正系数。
The systematic error of the circle reading micrometer is an important factor to influence on the accuracy of the diameter correction and of the position measurements of the circle.
度盘测微器系统误差是影响度盘对径改正精度和度盘位置测定精度的重要因素。
Radiotherapy quality can be improved by rapid assessment of the position and timely correction of set-up error.
因此在治疗中快速准确地做出摆位评估，及时纠正摆位误差，是保证放射治疗质量的关键。
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