Altschuler M D, Sontag M R, Bloch P
Phys Med Biol. 1987 May;32(5):543-56. doi: 10.1088/0031-9155/32/5/001.
Algorithms for fully three-dimensional divergent-beam radiotherapy treatment planning have been developed to achieve very high sampling of dose in heterogeneous (inhomogeneous density) tissue throughout an arbitrarily oriented patient volume, in clinically acceptable times of calculation. Dose is calculated at points along numerous rays which sample each beam. To display the dose distribution, the calculated dose values for each beam are interpolated onto rectilinear grids of (arbitrary) parallel planes, scaled for beam weight and finally merged with the weighted dose contributions of other beams. In this paper we describe and demonstrate the algorithm for the primary component of the three-dimensional photon dose distribution delivered to a patient.
已开发出用于全三维发散束放射治疗治疗计划的算法，以便在临床可接受的计算时间内，在任意取向的患者体容积内的异质（密度不均匀）组织中实现剂量的非常高的采样。沿着对每个射束进行采样的众多射线上的点计算剂量。为了显示剂量分布，将每个射束的计算剂量值插值到（任意）平行平面的直线网格上，按射束权重进行缩放，最后与其他射束的加权剂量贡献合并。在本文中，我们描述并演示了输送给患者的三维光子剂量分布的主要组成部分的算法。
