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X射线能量谱间接测量方法 被引量：2

Indirect measurement of X-ray spectrum
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摘要 X光机的X射线能量谱在CT图像硬化校正、散射校正和定量CT成像等技术中扮演着重要角色。提出了一种通过由质量衰减系数已知的材料构成的楔型模体的扫描数据来恢复X射线能量谱的方法。经GEANT4模拟数据及实采数据验证,该方法能够较好地恢复X光机的X射线能量谱。通过仿真实验,分析了在几个常用电压下模体材质和厚度对恢复X射线能量谱的影响。 An indirect measurement method to estimate the spectrum of X-ray source via the transmission data of a known wedge model is proposed.The numerical results show that the proposed method is valid to estimate X-ray spectrum from both kinds of data simulated by GEANT4 and scanned on real CT device.Based on GEANT4 simulation at different voltages,some choices on the parameters of the wedge phantom are suggested,including materials,width and length of the wedge phantom. X-ray spectrum at different voltages can be properly estimated.
作者 邹晶 王建光 王文彬 张朋
机构地区 首都师范大学检测成像实验室
出处 《光学技术》 EI CAS CSCD 北大核心 2008年第4期503-508,共6页 Optical Technique
基金 国家自然科学基金(60472071) 北京市自然科学基金(4051002)
关键词 X射线能量谱 间接测量方法 楔型模体 扫描数据 X-ray spectrum indirect measurement wedge phantom transmission data
分类号 O434.1 [机械工程—光学工程] O434.12 [机械工程—光学工程]
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参考文献9

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共引文献22

同被引文献14

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  • 10杨莹,牟轩沁,余厚军,陈希,张砚博,汤少杰.基于模型的钨靶X射线球管光谱重建[J].电子学报,2010,38(10):2285-2291. 被引量：5

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光学技术
2008年 第4期

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