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Transverse image slices from the MR, the noisy PET, and low-noise PET are shown in the top row. Transverse image slices from the denoised PET images based on the Gaussian, NLM-MR, BM4D, N2N, N2V, N2V-MR, N2V-PT, and N2V-PT-MR techniques are shown in the bottom row. The cases visualized here have PSNR values close to the mean PSNR and correspond to the datapoints indicated as circles with a white fill in Figure 7.
