| 基于衰减板的锥束CT散射校正 |
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| 引用本文： | 谢世朋,罗立民.基于衰减板的锥束CT散射校正[J].电子学报,2011,39(7):1708-1711. |
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| 作者姓名： | 谢世朋 罗立民 |
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| 作者单位： | 1. 东南大学计算机科学与工程学院,江苏南京210096;安徽大学数学与计算科学学院,安徽合肥230039
2. 东南大学计算机科学与工程学院,江苏南京,210096 |
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| 基金项目： | 江苏省研究生创新计划(No.CX10B-079Z) |
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| 摘 要： | 在锥束CT成像系统中,散射现象严重影响重建的图像质量.锥束CT成像散射校正的研究一直是一个热点问题.本文提出了一个新的散射校正方法,该方法需要在射线源和检测物之间放置一个衰减板,使用带有衰减板和不带衰减板两种情况下的成像,结合Klein-Nishina公式和Beer定理进行创新性的推导出散射分布.模体实验结果证明,本文算法可以有效的进行散射校正,显著的提高图像对比度和图像质量.
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| 关 键 词： | 散射校正 康普顿散射 衰减板 |
| 收稿时间： | 2010-05-26 |
Scatter Correction for Cone Beam CT Using Attenuation Baffle |
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| XIE Shi-peng,LUO Li-min.Scatter Correction for Cone Beam CT Using Attenuation Baffle[J].Acta Electronica Sinica,2011,39(7):1708-1711. |
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| Authors: | XIE Shi-peng LUO Li-min |
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| Affiliation: | XIE Shi-peng1,2,LUO Li-min1(1.School of Computer Science & Engineering,Southeast University.Nanjing,Jiangsu 210096,China,2.School of mathematics and computational science,Anhui University.Hefei,Anhui 230039,China) |
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| Abstract: | The scattering phenomenon has an important influence on the reconstructed image in Cone Beam CT(CBCT) imaging systems,and is a hot research on CBCT all the time.Aiming at the scatter artifact in the cone beam CT system,we proposed a new scatter correction method that needed to add an attenuation baffle between the Xray source and the tested object.This study is based on the Klein-Nishina formulas and Beer theorem.Through subtracting the scatter distribution image from the original projection image,we can ac... |
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| Keywords: | scatter correction Compton scatter attenuation baffle |
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