title: Image reconstruction algorithm for in-line phase contrast imaging computed tomography with an improved anisotropic diffusion model.
abstract: Phase contrast imaging (PCI) is a new physical and biochemical technique. Practical biomedical applications combine PCI with computer tomography (CT), Phase contrast CT (PC-CT) can reconstruct 3D images of samples. How to reconstruct high quality image at a low radiation dose level is a hot topic for PC-CT. In order to reduce radiation dose, a strategy is to collect incomplete projection data by few-view projection data. This work presents a reconstruction method for incomplete data PC-CT. It is based on an algebraic iteration reconstruction algorithm and combined with an anisotropic diffusion model to reduce aliasing distortions.To validate the availability of this method, the research carried out a computer-simulated and real experimental synchrotron data. The computer-simulated and real data results demonstrate that the presented method can improve the convergence speed of image reconstruction and reduce the aliasing distortions by incomplete projection data for PC-CT. However, there is no proof that this is true for all kinds of structures.
authors.affiliation: The School of Science, Tianjin University of Technology and Education, Tianjin, China.
authors.forename: Dongjiang
authors.initials: D
authors.lastname: Ji
authors.affiliation: College of Biomedical Engineering, Tianjin Medical University, Tianjin, China.
authors.forename: Chunhong
authors.initials: C
authors.lastname: Hu
authors.affiliation: College of Biomedical Engineering, Tianjin Medical University, Tianjin, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Yang
mesh_terms: D000465:Algorithms; D000792:Angiography; D016880:Anisotropy; D003287:Contrast Media; D006257:Head / Q000098:blood supply / Q000000981:diagnostic imaging; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008099:Liver / Q000098:blood supply / Q000000981:diagnostic imaging; D019047:Phantoms, Imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media
keywords: Incomplete data; PC-CT; POCS; anisotropic diffusion; in-line phase contrast imaging