应用PEAKFINDER测量质子束深度剂量分布

The measurement of the depth dose distribution of proton beam using the PEAKFINDER

目的测量点扫描质子束流水中深度剂量分布,检测最大剂量点与穿透深度的重复性。方法利用PEAKFINDER测量低能、中能和高能质子束流的水中深度剂量分布,给出深度分布曲线。结果最大剂量点与穿透深度值重复性的最大标准差分别为0. 05、0. 03 mm,远低于允许值1 mm。结论 PEAKFINDER测的最大剂量点与穿透深度精确度和重复性满足检测要求。

Objective To measure the depth dose distribution of proton under spot scanning in water,testing the reproducibility of the depth of maximum dose value and depth of penetration. Methods Measure the depth dose distribution of proton in low、middle and high energy scope with the PEAKFINDER,get the depth distribution curve. Results The maximum standard deviation of repeatability of maximum dose value and penetration depth is 0. 05 mm and 0. 03 mm,respectively,which is lower than the permitted value 1 mm. Conclusion The reproducibility and precision of the depth of maximum dose value and depth of penetration fulfill the testing request of PEAKFINDER.