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本文提出沿着等剂量线倾斜方向，等距地在同深度测量三点剂量，根据这三点剂量推导出楔形角和线顺角的方法，计算公式为：式中α为射线入射角，Ｋ是三点剂量及射束轴上百分深度量的函数。文中比较了本法和三维水箱扫描法所得楔形角大小．二者十分一致。在楔形角测量中、作者发现钴－６０γ线楔形角随深度有明显改变，故建议在使用楔形滤板前，应作必要的校测。
In this paper, we propose to measure the three-point dose equidistantly at the same depth along the direction of the isodose line. According to these three doses, the method of deriving the wedge angle and the straight-line angle is given by: where α is the angle of incidence of radiation, K Is a function of the dose at three points and the percentage of depth on the beam axis. The paper compares the wedge angle size obtained by this method and three-dimensional water tank scanning method. The two are very consistent. In the wedge angle measurement, the authors found that the wedge angle of cobalt-60γ line varies significantly with depth, so it is recommended that the necessary calibration be used before using the wedge filter.