Improved modeling of multiple scattering in the Voxel Monte Carlo model

被引：41

作者：

Kawrakow, I ^{[1
]}

机构：

[1] UNIV LEIPZIG,RADIOL CTR,CLIN RADIAT THERAPY,D-04103 LEIPZIG,GERMANY

来源：

MEDICAL PHYSICS | 1997年 / 24卷 / 04期

关键词：

electron beam; dose-calculation; Monte Carlo simulations; Voxel Monte Carlo;

D O I：

10.1118/1.597933

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

The implementation of an improved model for multiple scattering into the Voxel Monte Carlo (VMC) algorithm for fast electron dose calculation in radiation therapy is presented. The model takes into account path-length corrections (PLC) and lateral displacement in the individual electron steps. The extraction of the scattering power from the available computed-tomography images is discussed. It is shown that with the improved modeling of multiple electron scattering, the VMC algorithm is comparable in accuracy with PRESTA, the electron transport algorithm of EGS4. The problem of double counting of contributions from atomic electrons to the scattering power is considered and a simple solution is found. (C) 1997 American Association of Physicists in Medicine.

引用

页码：505 / 517

页数：13

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