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1. 发明授权

US6148272A System and method for radiation dose calculation within sub-volumes of a monte carlo based particle transport grid 失效
标题翻译：基于蒙特卡罗基粒子运输网格子体积内辐射剂量计算的系统和方法
公开(公告)号：US6148272A
公开(公告)日：2000-11-14
申请号：US238297
申请日：1999-01-28
申请人： Paul M. Bergstrom , Thomas P. Daly , Edward I. Moses , Ralph W. Patterson, Jr. , Alexis E. Schach von Wittenau , Dewey N. Garrett , Ronald K. House , Christine L. Hartmann-Siantar , Lawrence J. Cox , Donald H. Fujino
发明人： Paul M. Bergstrom , Thomas P. Daly , Edward I. Moses , Ralph W. Patterson, Jr. , Alexis E. Schach von Wittenau , Dewey N. Garrett , Ronald K. House , Christine L. Hartmann-Siantar , Lawrence J. Cox , Donald H. Fujino
IPC分类号： A61N5/10
CPC分类号： A61N5/1031 , A61N2005/1034
摘要： A system and method is disclosed for radiation dose calculation within sub-volumes of a particle transport grid. In a first step of the method voxel volumes enclosing a first portion of the target mass are received. A second step in the method defines dosel volumes which enclose a second portion of the target mass and overlap the first portion. A third step in the method calculates common volumes between the dosel volumes and the voxel volumes. A fourth step in the method identifies locations in the target mass of energy deposits. And, a fifth step in the method calculates radiation doses received by the target mass within the dosel volumes. A common volume calculation module inputs voxel volumes enclosing a first portion of the target mass, inputs voxel mass densities corresponding to a density of the target mass within each of the voxel volumes, defines dosel volumes which enclose a second portion of the target mass and overlap the first portion, and calculates common volumes between the dosel volumes and the voxel volumes. A dosel mass module, multiplies the common volumes by corresponding voxel mass densities to obtain incremental dosel masses, and adds the incremental dosel masses corresponding to the dosel volumes to obtain dosel masses. A radiation transport module identifies locations in the target mass of energy deposits. And, a dose calculation module, coupled to the common volume calculation module and the radiation transport module, for calculating radiation doses received by the target mass within the dosel volumes.
摘要翻译：公开了用于在粒子运输网格的子体积内进行辐射剂量计算的系统和方法。在方法的第一步中，接收包围目标质量块的第一部分的体素体积。该方法中的第二步确定了封闭目标物质的第二部分并与第一部分重叠的剂量体积。该方法中的第三步将计算dosel卷和体素卷之间的公共卷。该方法中的第四步确定了目标能量存量的位置。并且，该方法中的第五步骤计算在剂量体积内由目标质量接收的辐射剂量。共同体积计算模块输入围绕目标质量的第一部分的体素体积，输入对应于每个体素体积内的目标质量密度的体素质量密度，定义包围靶质量的第二部分并重叠的剂量体积第一部分，并计算dosel卷和体素卷之间的公共卷。一个dosel质量模块，通过相应的体素质量密度乘以公共体积以获得增量剂量质量，并且增加与剂量体积对应的增量剂量组，以获得剂量质量。辐射传输模块识别目标质量的能量沉积物中的位置。而且，一个剂量计算模块耦合到公共体积计算模块和辐射传输模块，用于计算目标质量在剂量体积内接收的辐射剂量。

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