^(192)Ir CT箱包安检系统中射线的能量硬化和散射  

Beam Hardening and Scatteringin ^(192)Ir CT Luggage Inspection System

作　　者：尹在哲[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《原子能科学技术》2006年第3期377-379,共3页Atomic Energy Science and Technology

摘　　要：本工作对192Ir CT箱包安检系统的射线能量硬化和散射进行实际测量和Monte-Carlo模拟计算,对该系统的能量硬化和散射影响予以定量分析,并提供CT图像重建校正的依据和方法。测量与计算结果表明,射线在吸收体中能量硬化的影响大于散射的影响。The beam hardening and scattering in ^192Ir CT luggage inspection system are simulated using Monte-Carlo method and compared with experimental results. A method is provided to correct the beam hardening and scattering effects to CT reconstructed images. The results of measurement and calculation show that the effect of beam hardening is larger than that of beam scattering in absorber.

关 键 词：^192Ir放射源 Beer定律 射线强度衰减 MONTE-CARLO模拟 

分 类 号：TL81[核科学技术—核技术及应用] O242.2[理学—计算数学]