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R2* maps for the simulated testing dataset with Rician noise (σg = 15). Top: Reference of R2* map and simulated noisy T2*-weighted images at three different echo times (ms). Bottom: R2* maps reconstructed using M1NCM, PCANR, MappingNet, and the proposed CadamNet methods, and the absolute difference maps are shown below the corresponding R2* maps. The SSIM of each R2* map is shown in its bottom right corner, and the NRMSE is shown in the absolute difference map.
