Kuchnir F T, Myrianthopoulos L C, Lossin E
Department of Radiation and Cellular Oncology, University of Chicago, Illinois 60637.
Radiother Oncol. 1990 Mar;17(3):239-47. doi: 10.1016/0167-8140(90)90208-e.
We have implemented a system for the design and construction of missing-tissue compensators for Radiation Therapy. The patient topography is obtained by Moire' photography. The thickness of lead required to compensate for a given amount of missing tissue was determined experimentally for three photo-beam energies and a combination of field sizes and geometries. With the aid of a computer, tissue deficit information is converted to isolead-thickness lines. These are used as input to a computer-controlled milling machine to fabricate the compensator. The effectiveness of compensation was evaluated in phantom and in vivo. This work describes the initial effort required to implement a program for compensation of tissue deficit at the patient's surface. It also introduces tools for assessing quantitatively the degree of dose uniformity which can be achieved using compensators in clinical applications.
我们已经实现了一个用于设计和构建放射治疗中组织缺失补偿器的系统。患者的体表轮廓通过莫尔摄影获得。针对三种光子束能量以及多种射野尺寸和几何形状的组合，通过实验确定了补偿给定数量组织缺失所需的铅厚度。借助计算机，将组织缺损信息转换为等铅厚度线。这些等铅厚度线用作计算机控制铣床的输入，以制造补偿器。在体模和体内对补偿效果进行了评估。这项工作描述了实施患者体表组织缺损补偿程序所需的初步努力。它还介绍了用于定量评估在临床应用中使用补偿器可实现的剂量均匀度的工具。
