Elsberry J S
Radiol Technol. 1979 Jul-Aug;51(1):51-63.
The intent of this article is twofold: to gain a basic understanding of radiotherapy dosimetric techniques that separate primary radiation dose from tissue scatter dose, and to introduce the use of a polar grid to simplify manual calculation of scatter dose in irregularly blocked fields. This technique requires the introduction of a new term, 'scatter-pixel,' which is defined in terms of more familiar expressions. Finally, the polar grid technique is evaluated against measured data for various cases of blocking and contour fall-off.
一是对将原发射线剂量与组织散射剂量区分开来的放射治疗剂量测定技术有基本的了解，二是介绍使用极坐标网格来简化不规则遮挡野中散射剂量的手动计算。该技术需要引入一个新术语“散射像素”，它是根据更常见的表达式来定义的。最后，针对各种遮挡和轮廓衰减情况的测量数据对极坐标网格技术进行了评估。
