论文部分内容阅读
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 recon-struction 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.