Andreo P, Brahme A
Phys Med Biol. 1986 Aug;31(8):839-58. doi: 10.1088/0031-9155/31/8/002.
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 as 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 and with recent experimental data is better than half a per cent.
已使用蒙特卡罗方法计算了用于放射治疗的高能光子束剂量测定的斯宾塞 - 阿蒂克斯阻止本领比。与以前相比，阻止本领比的计算方式更为一致，并作为束流衰减特性的函数给出。还研究了阻止本领比对束流电子污染以及深度和射野大小的依赖性。将结果与不同剂量测定协议中推荐的阻止本领比以及实验结果进行了比较。与大多数剂量测定协议的一致性在约百分之一以内，与最近的实验数据的一致性优于百分之零点五。
