Department of Radiation Oncology, University of California San Francisco, San Francisco, CA 94143-1708, USA.
J Appl Clin Med Phys. 2010 Aug 15;11(4):3318. doi: 10.1120/jacmp.v11i4.3318.
We design a practical procedure for measuring translational and rotational misalignment of graticule with collimator axis of rotation and collimator jaws, respectively. The procedure's quantitative results are accurate to less than 0.2 mm (at isocenter) and do not assume alignment of radiation focal spot with collimator axis of rotation. When provided with these quantitative results, the manufacturer can custom-adjust graticules to the purchaser's collimator head.
我们设计了一种实用的程序，分别用于测量光栅与准直器旋转轴以及准直器钳口的平移和旋转对准误差。该程序的定量结果精确到小于 0.2 毫米（在等中心处），并且不假设辐射焦点与准直器旋转轴对准。当提供这些定量结果时，制造商可以根据购买者的准直器头对光栅进行定制调整。
