Grillo Ruggieri F, Parietti E, Brunelli B, Scielzo G
Servizio di Radioterapia, Ospedali Galliera, Genova.
Radiol Med. 1990 Oct;80(4 Suppl 1):104-8.
The preliminary evaluation of the dosimetric characteristics of a dedicated intraoperative electron beam therapy system is described (Bionix Corporation). The linear accelerator is the Varian 2100 C with electron beam energies of 6, 9, 12, 16 e 20 MeV. The isodose distribution for each of 15 available applicators (5 plane and 10 beveled) has been studied with a water phantom. The problems of the homogeneity of dose distribution, scattered and leakage radiation outside the applicators and X-ray contamination of the electron beams have been addressed, at the nominal 20 MeV energy for exemplification. The accurate knowledge of such physical and dosimetric properties are necessary for the implementation of the IORT techniques in terms of choice of the applicator size and electron beam energy for tumor coverage and dose sparing of critical organs.
本文描述了一种专用术中电子束治疗系统（Bionix公司）剂量学特性的初步评估。直线加速器为Varian 2100 C型，电子束能量为6、9、12、16和20 MeV。使用水模研究了15种可用施源器（5种平面施源器和10种斜面施源器）各自的等剂量分布。以标称20 MeV能量为例，探讨了剂量分布均匀性、施源器外散射和泄漏辐射以及电子束X射线污染等问题。对于在选择施源器尺寸和电子束能量以覆盖肿瘤和保护关键器官免受剂量方面实施术中放射治疗技术而言，准确了解此类物理和剂量学特性是必要的。
