基于卷积法TV模型的锥束CT散射校正方法

被引:1
作者
李庆亮
闫镔
李磊
孙红胜
张峰
机构
[1] 信息工程大学电子科学与技术系
关键词
锥束CT; 散射校正; 卷积法; 泊松分布; 全变分;
D O I
暂无
中图分类号
TP391.41 [];
学科分类号
080203 ;
摘要
为了解决CT图像中散射伪影问题,提出并使用修正的泊松分布函数作为散射函数,然后利用卷积模型生成多个散射基图像,将基图像与原始重建图像的线性组合作为最终重建图像,最后,通过使重建图像的全变分函数最小求取线性组合系数最优解。该算法具有计算复杂度小、能够灵活应用于不同的成像对象的特点。实验结果表明,算法能够有效抑制散射导致的杯状和黑色带状伪影,提高图像对比度。
引用
收藏
页码:2235 / 2238
页数:4
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