Cormack D V, Lim M
Tom Baker Cancer Centre, Calgary, Alberta, Canada.
Med Dosim. 1988 Dec;13(4):191-3. doi: 10.1016/0958-3947(88)90007-6.
Irradiation of the chest wall is sometimes given following radical or modified radical mastectomy. The aim of treatment planning in such cases is to deliver a uniform dose to a superficial layer of tissue a few centimeters thick with an acceptably low dose to underlying tissues, particularly the lung. Both tangential photon beams and appositional electron beams have been used for this purpose, the choice between them being determined by the radiation modalities available, the extent and thickness of the designated target volume and the curvature of the patient's contour in the region. In this paper we will consider a few examples of both types of treatment with emphasis on the use of multiple electron fields. Dose distributions for the following plans were calculated using the system developed at the Cross Cancer Institute in Edmonton. In this system electron dose calculations are based on the Fermi-Eyges theory of multiple Coulomb scattering using the programs developed by Hogstrom and his co-workers.
在根治性或改良根治性乳房切除术后，有时会对胸壁进行照射。在此类病例中，治疗计划的目标是向几厘米厚的表层组织提供均匀剂量，同时使深层组织，尤其是肺部接受可接受的低剂量照射。切线光子束和对置电子束都已用于此目的，两者的选择取决于可用的放射治疗方式、指定靶区的范围和厚度以及该区域患者轮廓的曲率。在本文中，我们将考虑这两种治疗类型的一些示例，重点是多电子野的使用。使用埃德蒙顿十字癌症研究所开发的系统计算了以下计划的剂量分布。在该系统中，电子剂量计算基于费米 - 艾格斯多次库仑散射理论，使用霍格斯特罗姆及其同事开发的程序。
