Analytic resolution of FDK algorithm

Article type: Research Article

Authors: Zhang, Li | Tang, Jie | Xing, Yuxiang | Cheng, Jianping

Affiliations: Department of Engineering Physics, Tsinghua University, Beijing, China. E-mail: [email protected], [email protected], [email protected], [email protected]

Note: [] Corresponding author: Li Zhang, Department of Engineering Physics, Tsinghua University, Beijing 100084, China. Tel.: +86 10 62780909 86201; Fax: +86 10 62795883; E-mail: [email protected]

Abstract: The resolution of practical CT systems depends on many factors. Reconstruction algorithm is one of the most important factors. In this paper, we investigate the resolution of the standard FDK algorithm, present a formula to analytically compute the in-slice point-spread function in FDK reconstructions, and validate the analytic PSF by numerical simulations. The experimental results show that this process can predict the in-slice point spread function in FDK reconstructions quite well.

Keywords: Computed tomography (CT), FDK algorithm, analytic resolution

Journal: Journal of X-Ray Science and Technology, vol. 14, no. 3, pp. 151-159, 2006