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NSI produces images with nonuniform resolution and thus traditional g-factor maps cannot be used to assess different acquisition schemes. Here, point spread function (PSF) maps at R=4 acceleration factor for (A) Cartesian SENSE (where the PSF is constant across the FOV), (B) NSI with Ns =128 (readout sampling), and (C) NSI with Ns = 256. Notably, the PSF map of NSI improves with additional readout sampling due to the nonlinear field encoding in 2D.
