SRT-100浅层X射线治疗系统辐射能谱的模拟研究  

Simulation Study of Radiation Energy Spectrum of SRT-100 Superficial X-ray Therapy System

作　　者：包俊霞 赵瑞[2] 汤显强 吴金杰[2] 丁卫撑[1] 张笑 常茂远 BAO Junxia;ZHAO Rui;TANG Xianqiang;WU Jinjie;DING Weicheng;ZHANG Xiao;CHANG Maoyuan(Chengdu University of Technology,Chengdu,Sichuan 610059,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]成都理工大学,四川成都610059 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2024年第8期1236-1241,共6页Acta Metrologica Sinica

基　　金：中国计量科学研究院基本科研业务费(AKYZZ2318)。

摘　　要：浅层X射线治疗在术后瘢痕的修复、皮肤的病变治疗等领域展现了良好的优越性。为研究SRT-100型浅层X射线治疗系统产生的辐射质,利用EGSnrc软件模拟不同管电压下的能谱,并与Spekcalc程序计算的能谱进行比较,结果显示两者具有很好的一致性。研究了X射线管不同靶角对半值层的影响,结果表明靶角越大,半值层越小。根据模拟得到的能谱计算出平均能量和有效能量,与Spekcalc的计算结果进行比较,平均能量的最大偏差为0.7%,有效能量的最大偏差为5.8%。Superficial treatment has shown good advantages in the repair of postoperative scars and the treatment of skin lesions.In order to study the radiation quality produced by SRT-100 superficial X-ray therapy system,EGSnrc software was used to simulate the energy spectrum at different tube voltages,and the energy spectrum was compared with the energy spectrum calculated by Spekcalc program.The result showed good agreement between them.The effect of different target angles of the X-ray tube on the half-value layer was studied,and the result showed that the larger the target angle,the smaller the half-value layer.The mean energy and the effective energy were calculated from the simulated energy spectrum.Compared with the results of Spekcalc,results displayed that the maximum deviation of the average energy and the effective energy are 0.7%and 5.8%respectively.

关 键 词：电离辐射计量 浅层X射线 蒙特卡罗模拟 辐射能谱 

分 类 号：TB98[一般工业技术—计量学]