目的检定医用电子加速器时对三维水箱进行快速准确摆位。方法利用加速器的激光定位线交汇于加速器的等中心原理,结合水箱体四周面几何中心线,叙述了三维水箱快捷的摆位方法,同时介绍了电离室定位的技巧,提出电离室上的标识测量点校正意见和校正的方法。结果提高了检定效率。结论摆位前校正激光定位线是关键。 Objective To test the medical electron accelerator to quickly and accurately locate the three-dimensional water tank. Methods Based on the isocenter principle that the laser locating line of the accelerator meets the accelerator and the geometrical centerline of the surrounding surface of the water tank, a quick setting method of the three-dimensional water tank is described. At the same time, the technique of locating the ionization chamber is introduced, Method of measuring point correction and correction. The result improves the verification efficiency. Conclusion It is the key to correct the laser alignment before setting.