Affiliations: Department of Engineering Physics, Tsinghua
University, Beijing, China. E-mail: zhangli@nuctech.com,
tangjie35@tsinghua.org.cn, xingyx@mail.tsinghua.edu.cn,
chengjp@mail.tsinghua.edu.cn
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: zhangli@nuctech.com
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.
