Anisotropic total variation minimization approach in in-line phase-contrast tomography and its application to correction of ring artifacts

doi:10.1088/1674-1056/26/6/060701

Abstract In-line phase-contrast computed tomography (IL-PC-CT) imaging is a new physical and biochemical imaging method. IL-PC-CT has advantages compared to absorption CT when imaging soft tissues. In practical applications, ring artifacts which will reduce the image quality are commonly encountered in IL-PC-CT, and numerous correction methods exist to either pre-process the sinogram or post-process the reconstructed image. In this study, we develop an IL-PC-CT reconstruction method based on anisotropic total variation (TV) minimization. Using this method, the ring artifacts are corrected during the reconstruction process. This method is compared with two methods:a sinogram preprocessing correction technique based on wavelet-FFT filter and a reconstruction method based on isotropic TV. The correction results show that the proposed method can reduce visible ring artifacts while preserving the liver section details for real liver section synchrotron data.

Keywords: SART anisotropic TV in-line phase-contrast

Received: 05 December 2016
Revised: 15 February 2017
Accepted manuscript online:

PACS:	07.05.Pj	(Image processing)
	07.85.Qe	(Synchrotron radiation instrumentation)
	42.30.Wb	(Image reconstruction; tomography)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61671004, 61271012, 81371549, 81671683, and 11501415), the Natural Science Foundation of Tianjin City, China (Grant No. 16JCYBJC28600), the WBE Liver Fibrosis Foundation of China (Grant No. CFHPC20131033), the Instrument Developing Project of the Chinese Academy of Sciences (Grant No. YZ201410), the Foundation of Tianjin University of Technology and Education (Grant Nos. KJ11-22 and J10011060321), SRF for ROCS, SEM, and the IHEP-CAS Scientific Research Foundation (Grant No. 2013IHEPYJRC801).

Corresponding Authors: Gang-Rong Qu
E-mail: grqu@bjtu.edu.cn

Cite this article:

Dong-Jiang Ji(冀东江), Gang-Rong Qu(渠刚荣), Chun-Hong Hu(胡春红), Bao-Dong Liu(刘宝东), Jian-Bo Jian(简建波), Xiao-Kun Guo(郭晓坤) Anisotropic total variation minimization approach in in-line phase-contrast tomography and its application to correction of ring artifacts 2017 Chin. Phys. B 26 060701

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Anisotropic total variation minimization approach in in-line phase-contrast tomography and its application to correction of ring artifacts

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