Affiliations: [a] School of Science, Beijing Jiaotong University, Beijing, China | [b] School of Science, Tianjin University of Technology and Education, Tianjin, China | [c] Beijing Center for Mathematics and Information Interdisciplinary Sciences, Beijing, China | [d] College of Biomedical Engineering, Tianjin Medical University, Tianjin, China | [e] Key laboratory of Opto-electronic Information Technology, Ministry of Education (Tianjin University), Tianjin, China
Correspondence:
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Corresponding author: Gangrong Qu, School of Science, Beijing Jiaotong University, Beijing, China. E-mail: grqu@bjtu.edu.cn.
Abstract: In practice, mis-calibrated detector pixels give rise to wide and faint ring artifacts in the reconstruction image of the In-line phase-contrast computed tomography (IL-PC-CT). Ring artifacts correction is essential in IL-PC-CT. In this study, a novel method of wide and faint ring artifacts correction was presented based on combining TV-L1 model with guided image filtering (GIF) in the reconstruction image domain. The new correction method includes two main steps namely, the GIF step and the TV-L1 step. To validate the performance of this method, simulation data and real experimental synchrotron data are provided. The results demonstrate that TV-L1 model with GIF step can effectively correct the wide and faint ring artifacts for IL-PC-CT.
