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Nowadays, limited-angle problems are common in many Computed Tomography (CT) applications. In order to achieve a more satisfactory reconstruction in these problems, a compressed sensing (CS) based method Total Variation (TV) is developed. Usually, iterative methods are proposed to get a better stability as the projection views are less than theoretical requirements. Thus, these problems are achieved...
The CT limited-angle problem has been discussed for many years because of the strong demand in medical imaging applications. However as a severely ill-posed problem, it is hard to achieve accurate reconstruction if no additional prior information is given. Recently, an ART+TV reconstruction method was proposed. With the prior knowledge of image sparsity, the ART+TV gives high quality reconstructions...
X-ray phase contrast imaging (PCI) has great potential in the medical diagnosis, material science et al and has made great progress in the last ten years. Diffraction enhanced imaging and grating-based imaging are the two significant methods for PCI, currently. Two methods are named differential phase contrast imaging because the projection data is partial derivatives of refractive index. Analytical...
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