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In this work, a hybrid reconstruction method is proposed to solve the problem of exterior CT reconstruction. A 2D filtering with data extrapolation method is used to overcome the data truncation problem in exterior CT. The result of 2D filtering is processed by a dual-dictionary learning method to reduce the limited angle artifacts and noise in the exterior CT reconstruction. Experimental studies...
In this work, a two-dictionary learning (TDL) based algorithm is proposed to solve the problem of image reconstruction in X-ray computed tomography (CT) with limited angle projections. One dictionary trained from a high quality image is used to improve the reconstruction image quality, and the other dictionary trained from artifacts is to reduce the limited angle artifact. Experiments with simulated...
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