Fig. 3
From: A sinogram denoising algorithm for low-dose computed tomography
Performance comparison between different sinogram denoising algorithms in terms of RMSE and SSIM on the scan of the physical phantom. Values for the bilateral filtering algorithm are plotted as a function of σ (the bottom horizontal axis), whereas the values for the proposed algorithm are plotted as a function of the regularization parameter λ (the top horizontal axis). The solid squares indicate the points of optimum