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A‐C, Electromagnetic simulations—central sagittal and axial planes of the B 1 field for ε r = 51, σ = 0.6 S/m (A), ε r = 78, σ = 0.6 S/m (B) and ε r = 78, σ = 0.1 S/m (C). Each map is scaled from 0 to maximum. D, Histogram of the B 1 distribution in the brain for each case. The Y‐axis shows the fraction of the total number of voxels
