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The resolution insert slice of ACR phantom reconstructed by zero-padding (a-c), partial Fourier homodyne reconstruction (d-f), and from fully sampled k-space data (g-i), before and after GNL correction. a, d, and g: images without GNL correction; b, e, and h: images corrected with standard GNL correction; c, f, and i: images corrected with the proposed NUFFT-based strategy.
