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- W2192569879 abstract "Abstract An important problem in low-dose CT is the image quality degradation caused by photon starvation. There are a lot of algorithms in sinogram domain or image domain to solve this problem. In view of strong self-similarity contained in the special sinusoid-like strip data in the sinogram space, we propose a novel non-local filtering, whose average weights are related to both the image FBP (filtered backprojection) reconstructed from restored sinogram data and the image directly FBP reconstructed from noisy sinogram data. In the process of sinogram restoration, we apply a non-local method with smoothness parameters adjusted adaptively to the variance of noisy sinogram data, which makes the method much effective for noise reduction in sinogram domain. Simulation experiments show that our proposed method by filtering in both image and projection domains has a better performance in noise reduction and details preservation in reconstructed images." @default.
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- W2192569879 date "2015-01-14" @default.
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- W2192569879 title "An adaptive nonlocal filtering for low-dose CT in both image and projection domains" @default.
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- W2192569879 doi "https://doi.org/10.1016/j.jcde.2014.12.007" @default.
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