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a–f: g-Factor histograms for SENSE (black line), phase-constrained SENSE (red line), turboSENSE with the fully-resolved phase (green line), and turboSENSE with iterative phase refinement (blue line) for different reduction factors (R = 2–7). The latter three have similar histograms and lower g-factors than SENSE. g: RMS measurements as a function of reduction factor.
