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(a) Magnitude of the artifact in fine grid ROI (RMSE of μart in Fig. 3, given by Eq. 11) as a function of noise in the coarse grid region. The noise metric quantifies the cumulative effect of regularization and voxel downsampling in μC. (b) The artifact ROI (μart) in the fine grid region for a range of downsampling factors (rows) and normalized coarse grid regularization strengths β (columns).
