A curve-filtered FDK (C-FDK) reconstruction algorithm for circular cone-beam CT

作者：Li, Liang^*; Xing, Yuxiang; Chen, Zhiqiang; Zhang, Li; Kang, Kejun

来源：Journal of X-Ray Science and Technology, 2011, 19(3): 355-371.

DOI：10.3233/XST-2011-0299

• Cone-beam CT
• Image reconstruction
• FDK
• C-FDK
• Cone-angle

Circular cone-beam CT is one of the most popular configurations in both medical and industrial applications. The FDK algorithm is the most popular method for circular cone-beam CT. However, with increasing cone-angle the cone-beam artifacts associated with the FDK algorithm deteriorate because the circular trajectory does not satisfy the data sufficiency condition. Along with an experimental evaluation and verification, this paper proposed a curve-filtered FDK(C-FDK) algorithm. First, cone-parallel projections are rebinned from the native cone-beam geometry in two separate directions. C-FDK rebins and filters projections along different curves from T-FDK in the centrally virtual detector plane. Then, numerical experiments are done to validate the effectiveness of the proposed algorithm by comparing with both FDK and T-FDK reconstruction. Without any other extra trajectories supplemental to the circular orbit, C-FDK has a visible image quality improvement.

• 出版日期2011
• 单位清华大学