Geometric correction for Cone-Beam CT reconstruction and artifacts reduction

摘要：

The FDK algorithm is one of the most widely referenced and used algorithm for cone-beam CT reconstruction in circular trajectory because of its simplicity of implementation and computational efficiency. However, images reconstructed by the FDK algorithm of real projection data may be blurred without electronic correction and geometric calibration, and are often plagued by deleterious ring artifacts and shading artifacts. In this paper, images reconstructed with and without detector correction are compared base on computer experiment of real biological object. Furthermore, Algorithms for shading artifacts reduction and fast ring artifacts reduction are also introduced. The experimental simulation shows that these algorithms are effective in reducing ring and shading artifacts without compromising the image resolution, and produce satisfactory results.

关键词： Cone-beam CT FDK algorithm detector correction ring artifacts reduction shading artifacts reduction

作者: Jun Yang Xin Zhen Linghong Zhou Shuxu Zhang Zhuoyu Wang Lin Zhu Wenting Lu

作者单位: School of Biomedical Engineering Southern Medical University 510515, Guangzhou, China

会议类型: 国际会议

会议名称: The 2nd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2008)(第二届生物信息与生物医学工程国际会议)

会议地点: 上海

会议语种:英文

页码: 2408-2411

在线出版日期: 2008-05-16（万方平台首次上网日期，不代表论文的发表时间）