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

作　　者：冀东江 渠刚荣 胡春红 刘宝东 简建波 郭晓坤 

机构地区：[1]School of Science, Beijing Jiaotong University, Beijing 100044, China [2]School of Science, Tianjin University of Technology and Education, Tianjin 300222, China [3]Beijing Center for Mathematics and Information Interdisciplinary Sciences, Beijing 100048, China [4]College of Biomedical Engineering, Tianjin Medical University, Tianjin 300070, China [5]Division of Nuclear Technology and Applications, Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS), Beijing 100049, China [6]Beijing Engineering Research Center of Radiographic Techniques and Equipment, Beijing 100049, China [7]University of Chinese Academy of Sciences, Beijing 100049, China [8]Radiation Oncology Department, Tianjin Medical University General Hospital, Tianjin 300052, China [9]The Second Hospital of Tianjin Medical University, Tianjin 300070, China

出　　处：《Chinese Physics B》2017年第6期93-100,共8页中国物理B（英文版）

基　　金：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;the IHEP-CAS Scientific Research Foundation(Grant No.2013IHEPYJRC801)

摘　　要：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.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.

关 键 词：SART anisotropic TV in-line phase-contrast 

分 类 号：R814.42[医药卫生—影像医学与核医学] TP391.41[医药卫生—放射医学]