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Sinogram constrained TV-minimization for metal artifact reduction in CT (1404.6691v1)
Published 26 Apr 2014 in math.NA, cs.CV, and physics.med-ph
Abstract: A new method for reducing metal artifacts in X-ray computed tomography (CT) images is presented. It bases on the solution of a convex optimization problem with inequality constraints on the sinogram, and total variation regularization for the reconstructed image. The Chambolle-Pock algorithm is used to numerically solve the discretized version of the optimization problem. As proof of concept we present and discuss numerical results for synthetic data.