COMPUTER-ASSISTED 3-D RADIATION TREATMENT PLANNING

这一持续项目的目的是为了开发和临床 一种通用外束处理系统的实现 计划。它将使现有的处理方法得到最佳利用 设施。该系统基于广义的三维剂量场模型 它涵盖了光子、电子以及中子束。这台电脑 计划及其大部分临床实施工作已经完成 可从当地的Clinac 4、Clinac 8和 Clinac 20直线加速器。正在继续开展工作，落实 具有2个光子能量和9个电子能量的微加速器 不同寻常的技术选择。X射线能量的实现有 由于技术上的复杂性而被推迟。当前的能力 包括对大多数辐照技术交互模拟，包括 大多数束流修正装置的效果。横向患者轮廓是 叠加在相应的CT扫描上，以便可以关联剂量分布 向解剖学致敬。在四台新的辐射机器中，有三台已经 实施常规治疗计划。工作仍在继续 我们的大部分计算机程序在VAX-11/750系统上的优化 部分利用了密歇根大学的成像技术 在安娜堡。目前正在实施的是一项新的本地开发的 电子束模型极具简单性和准确性。这项工作是，因为 以前，由于需要继续提供可靠的日常支持， 临床治疗。

The purpose of this continuing project is the development and clinical implementation of a generalized system for external beam treatment planning. It will enable the optimum utilization of existing treatment facilities. The system is based on a generalized 3-D dose field model which covers photon and electrons as well as neutron beams. The computer program and most of its clinical implementaiton was completed for the photon and electron fields available from the local Clinac 4, Clinac 8 and Clinac 20 linear accelerators. Work is continuing on the implementation of the Microtron with its 2 photon energies and 9 electron energies and some unusual technical options. The implementation of the X-ray energies has been delayed due to technical complications. The current capabilities include interactive simulation of most irradiation techniques, including the effect of most beam modifying devices. Transverse patient contours are overlaid on corresponding CT scans so that dose distribution can be related to the anatomy. Three of the four new radiation machines have been implemented for routine treatment planning. Work is continuing on optimization of most of our computer programs on the VAX-11/750 system making use, in part, of imaging developments at the University of Michigan at Ann Arbor. Currently being implemented is a new locally developed electron beam model of great simplicity and accuracy. This work is, as before, complicated by the need for continuing reliable routine support for the clinical treatment.