RADIATION FIELD MODELING

这是正在进行的研究和开发。 的能力 计算光子产生的吸收剂量分布 电子束和电子束的最一般特征是 是放疗的基础 辐射场模型已经 之前描述的。 它以经验分布为基础， 沿着“主”中的沿着三条相互垂直的参考线 领域“这一概念适用于光束修正装置， 好. 这种方法的一个优点是， 实验数据，因此可以很容易地实现。 一种全新的电子场建模方法已经被 1987年出版并出版。 它在单位密度上的应用 媒体已经实施。 对非均匀介质的扩展是 正在进行中 特别有趣的是， 处理不同的电子能量和场的形状， 与光子场结合。

This is ongoing research and development. The capability to calculate the distribution of absorbed dose produced by photon beams and electron beams of the most general characteristics is fundamental to radiotherapy. The radiation field model has been described before. It takes as a basis the empirical distributions along three mutually perpendicular reference lines in a "master field." This concept is applied to the beam-modifying devices as well. One virtue of this approach is that it requires few experimental data and thus can be implemented very easily. A completely new approach to electron field modeling has been developed and published in 1987. Its application to unit density media has been implemented. Extension to inhomogeneous media is underway. Of special interest are the implications for easy handling of different electron energies and field shapes in combination with photon fields.