STOPPING POWER DATA FOR HIGH-ENERGY PHOTON BEAMS
STOPPING POWER DATA FOR HIGH-ENERGY PHOTON BEAMS
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DOI：
10.1088/0031-9155/31/8/002
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发表时间：
1986-08-01
影响因子：
3.5
通讯作者：
BRAHME, A
中科院分区：
文献类型：
--
作者：
ANDREO, P;BRAHME, A
使用蒙特卡罗方法计算了放射治疗中使用的高能光子束剂量测定的 Spencer-Attix 阻止功率比。停止功率比的计算方式比以前更加一致，并且是光束衰减特性的函数。还研究了阻止功率比对光束电子污染以及深度和视场尺寸的依赖性。将结果与不同剂量测定方案中推荐的停止功率比以及实验结果进行比较。与大多数剂量测定协议的一致性约为百分之一，而最近的实验数据则优于半个百分点。
Spencer-Attix stopping power ratios for the dosimetry of high-energy photon beams used in radiation therapy have been calculated using the Monte Carlo method. The stopping power ratios are calculated in a more consistent way than previously and are given a function of the attenuation properties of the beam. The dependence of the stopping power ratio on the electron contamination of the beam as well as on depth and field size has also been investigated. Results are compared with stopping power ratios recommended in different dosimetry protocols and to experimental results. The agreement with most dosimetry protocols is within about one per cent with recent experimental data is better than half a per cent.