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Inter-session standard deviation (SD) of B0 and B1+ maps. The inter-session SD of B0 maps is significantly lower in BH than FB (a, P < 0.01). For each channel of B1+ maps, SDs are also significantly lower in BH than FB (b and c, P < 0.01 for both). *P < 0.01; BH, breath-holding; FB, free-breathing.
