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The local k-space illustrates the shape of the sampled k-space for different points throughout the FOV. From the local k-space distribution, we can qualitatively estimate the regularity of the encoding functions and the related incoherence. O-space (A) does not maximize incoherence. (B) Perturbed CP O-space with a 30% pseudo-randomization of the nonlinear Z2 gradient generates a more distributed and pseudo-random sampling.
