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Wing artifact correction of CT images based on sinogram
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- Author:
- No author available
- Journal Title:
- JOURNAL OF THE FOURTH MILITARY MEDICAL UNIVERSITY
- Issue:
- 3
- DOI:
- 10.3321/j.issn:1000-2790.2009.03.005
- Key Word:
- 体层摄影术x线计算机/仪器和设备;环形伪影;弦图;Hough变换
Abstract： 目的:基于弦图去除CT图像环形伪影.方法:在含有环形伪影数据的CT投影弦图中,通过中值滤波,Sobel检测器的边缘检测函数edge对边缘数据进行标记.结合Hough或bwlabel变换,找到弦图上线状伪影的位置.利用插值算法,去除环形伪影投影数据.并采用计算机模拟对方法进行了验证.结果:实验证明测试算法有效可行.结论:Hough变换可以用于基于弦图的环形伪影校正,此外,优化结果还需调整其它一些相关参数.
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