A comparison of Monte Carlo and analytic first scatter dose spread arrays.

A comparison of Monte Carlo and analytic first scatter dose spread arrays.
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蒙特卡罗和解析第一散射剂量扩散阵列的比较。

DOI:
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发表时间:
1999
期刊:
Medical Physics (Lancaster)
影响因子:
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通讯作者:
T. Mackie
T. Mackie
中科院分区:
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文献类型:
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作者:
J. McGary;A. Boyer;T. Mackie

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我们比较了蒙特卡罗方法和一种解析方法产生的第一散射点剂量分布阵列。该分析方法用Klein-Nishina截面模拟康普顿散射的能量沉积,并用近似的电子传输模拟能量沉积。分析方法中的假设在点剂量扩展核的区域内是有效的,在该区域中可以进行有意义的比较。对于半径大于与第一个散射康普顿光子相关的电子范围的前向散射方向,模型之间的差异不到10%。讨论了后向散射区的差异,并表明该分析模型对于识别数值产生的第一散射点剂量扩散阵列中可能存在的大误差是有用的。该解析法简单、实用,可用于一次散射核的验证。
We compare first scattered point dose spread arrays generated by Monte Carlo and an analytic method. The analytic method models energy deposition using Klein-Nishina cross sections for Compton scatter and approximations for electron transport. Assumptions in the analytic method are shown to be valid within a region of the point dose spread kernel in which meaningful comparisons can be made. Differences between the models are less than 10% for the forward scatter directions for radii greater than the electron range associated with the first scattered Compton photon. Differences in the backscatter region are discussed and indicate that the analytic model is useful for identifying large errors that might be present in numerically generated first scatter point dose spread arrays. The analytic method is simple and useful for validating first scatter kernels.
使用超级计算机进行交互式、并行、三维快速傅里叶变换卷积剂量计算。
DOI: 10.1118/1.597934
发表时间: 1997
期刊: Medical physics
影响因子: 3.8
作者:
McGary,JE;Boyer,AL
通讯作者: Boyer,AL
结合显式电子传输的光子剂量计算。
DOI: 10.1118/1.597611
发表时间: 1995
期刊: Medical physics
影响因子: 3.8
作者:
Yu,CX;Mackie,TR;Wong,JW
通讯作者: Wong,JW