X-ray Phase-contrast CT Reconstruction by Solving Poisson Equation with Boundary Condition from Absorption CT

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Abstract
X-ray phase CT has a lot of applications, including non-destructive testing and field of medicine because it can observe small differences in material density than conventional X-ray absorption CT. However, artifacts unique to phase CT may appear in conventional method. Therefore, we propose a new method for reconstructing CT volume from two-directional differential phase contrast images by solving the Poisson equation. Our method reduces artifacts in air regions and improves image quality in some cases.