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Statistical denoising
Statistical Denoising,
Sinogram Domain
Sinogram => Adaptive or iterative denoiser => Cleaned
sinogram => FBP => Final Image
Wang et al., T-MI, Oct. 2006, using PWLS-GS on sinogram
Filtered Backprojection Low Dose
FBP from denoised sinogram
Statistical Reconstruction in CT, Jeffrey A. Fessler, SPIE Medical Imaging Workshop, Feb. 13, 2011