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连续谱X射线在ICT中的能谱硬化修正模型
引用本文:彭光含,杨学恒,韩忠,蒲兴成.连续谱X射线在ICT中的能谱硬化修正模型[J].光谱学与光谱分析,2005,25(11):1880-1883.
作者姓名:彭光含  杨学恒  韩忠  蒲兴成
作者单位:1. 重庆大学数理学院,重庆 400044
2. 重庆邮电学院计算机学院,重庆 400065
3. 重庆大学自动化学院,重庆 400044
基金项目:国家科委“八五”火炬计划项目资助
摘    要:X射线ICT中,由于连续谱X射线源在穿过物质时,能量较低的射线优先被吸收,也即较高能量的X射线的衰减系数比较低能量的X射线的衰减系数小,射线随透射厚度增大,变得更易穿透,也就是发生了能谱硬化现象。如不加修正,必引起赝像。文中对能谱硬化现象进行实验和理论上的分析,探讨了在均匀物质中, X射线的衰减系数与透射厚度的关系, 提出新的能谱硬化修正方法和严谨精确的能谱硬化修正模型。

关 键 词:连续谱  X射线  ICT  硬化修正模型  
文章编号:1000-0593(2005)11-1880-04
收稿时间:2004-07-08
修稿时间:2004-11-23

Hardening Correction Model of Energy Spectrum for Continuous Spectrum X-Ray ICT
PENG Guang-han,YANG Xue-heng,HAN Zhong,PU Xing-cheng.Hardening Correction Model of Energy Spectrum for Continuous Spectrum X-Ray ICT[J].Spectroscopy and Spectral Analysis,2005,25(11):1880-1883.
Authors:PENG Guang-han  YANG Xue-heng  HAN Zhong  PU Xing-cheng
Institution:1. College of Science, Chongqing University, Chongqing 400044 , China2. College of Computer, Chongqing University of Posts and Telecommunication, Chongqing 400065, China3. College of Automatization, Chongqing University, Chongqing 400044, China
Abstract:In the case of a polyehromatic source in X-ray ICT, the variation of attenuation coefficient with energy leads to low energy radiation being absorbed preferentially. In other words, the higher the energy, the more lower the attenuation coefficient. With the transmission thickness augmenting, it is easier for X-ray to transmit the matter. The phenomenon is energy spectrum hardening. Thus, hardening correction has to be done. In the present paper, not only energy spectrum hardening is analyzed by experiment and theory and the relation is stated between attenuation coefficient and transmission thickness, but also the new theory method and the precise accurate theory model for hardening correction of energy spectrum are proposed.
Keywords:Continuous spectrum  X-ray  ICT  Hardening correction model
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