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. Author manuscript; available in PMC: 2018 Feb 1.
Published in final edited form as: Magn Reson Med. 2016 Feb 17;77(2):884–894. doi: 10.1002/mrm.26153

Figure 2.

Figure 2

Loop-dipole block simulations of (a, d) peak voxel-wise SAR, (b, e) B1+ transmit efficiency (c, f) B1+ SAR efficiency are shown for dipole-only (blue), loop-only (purple) and loop-dipole combined (black) excitations. Plots in the top row show the impact of changing the relative phase of loop-dipole combined excitation. Plots in the bottom row investigate the impact of attenuating the loop excitation power compared to dipole in the loop-dipole B1+ efficiency phase optimized combined excitation.