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A) Propagated motion artifact-to-noise contours from an accelerated (R = 2) GRAPPA simulation. Two contours representing potential interarray decoupling requirements for the propagated motion artifact to be equal to and one third of the noise floor are labeled. B) Reconstructions of the static numerical phantom images and difference from the ideal reconstruction are shown, windowed to emphasize noise and artifact, for two example contour points (1 and 2).
