基于Wiener滤波的反投影图像重建算法  

A Wiener filtering based back project lgorithm for image reconstruction ion a

作　　者：马敏[1] 赵亮[1] 姬晶晶[1] 

机构地区：[1]中国民航大学航空自动化学院,天津300300

出　　处：《核技术》2012年第9期675-679,共5页Nuclear Techniques

基　　金：国家自然科学基金青年基金(61102096);中国民航大学中央高校基金(ZXH2010C005)资助

摘　　要：CT是一种先进的成像技术,投影重建图像为关键技术之一,目前CT图像重建算法多采用滤波反投影针对投影数据不足所产生伪影的问题,经分析伪影产生的原因后,提出了一种基于Wiener滤波与反投算法。算法利用Wiener滤波对传统的滤波反投影图像重建算法进行改影图像重建算法相结合的新图像重建算法,该克服重建图像伪影。通过对典型流型进行实验仿真,证明改进后的算法对重建图像的质量有明进,能较好地显改善。In the context of computed tomography （CT）, a key techniques is the image reconstruction from projection data. The filtered back projection （FBP） algorithm is commonly used in image reconstruction. Based on cause analysis of the artifacts, we propose a new image reconstruction algorithm combining the Wiener filter and FBP algorithm. The conventional FBP image reconstruction algorithm is improved by adopting Wiener filter, and artifacts in the reconstructed images are obviously reduced. Experimental results of typical flow regimes show that the improved algorithm can effectively improve the image quality.

关 键 词：CT 图像重建 滤波反投影 Wiener滤波 伪影 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]