Abstract:In X-ray computed tomography (CT) examinations nowadays, radiation dose reduction without degrading CT images has caused significant concerns. One simple and effective way for dose reduction is to reduce the number of X-ray projections to reconstruct CT images. Non-local means (NLM) based reconstruction methods have been studied for years, but often lead to over-smoothness on edge information in a reconstructed image. In this work, an adaptive NLM (ANLM) into sparse-projection image reconstruction was introduc… Show more
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