基于衰减板的锥束CT散射校正

谢世朋;罗立民

电子学报 ›› 2011, Vol. 39 ›› Issue (7) : 1708-1711.

PDF(783 KB)
PDF(783 KB)
电子学报 ›› 2011, Vol. 39 ›› Issue (7) : 1708-1711.
科研通信

基于衰减板的锥束CT散射校正

  • 谢世朋1,2, 罗立民1
作者信息 +

Scatter Correction for Cone Beam CT Using Attenuation Baffle

  • XIE Shi-peng1,2, LUO Li-min1
Author information +
文章历史 +

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.

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 X-ray 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 acquire the scatter corrected projection Images of the tested object.The result showed that the method can effectively increase the image contrast and increase the quality of the reconstructed slice image.

关键词

散射校正 / 康普顿散射 / 衰减板

Key words

scatter correction / Compton scatter / attenuation baffle

引用本文

导出引用
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.
XIE Shi-peng;LUO Li-min. Scatter Correction for Cone Beam CT Using Attenuation Baffle[J]. Acta Electronica Sinica, 2011, 39(7): 1708-1711.
中图分类号: O434.1   

基金

江苏省研究生创新计划 (No.CX10B-079Z)
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江苏省研究生创新计划(No.CX10B-079Z)
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