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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: Magn Reson Med. 2017 Jul 4;79(3):1789–1803. doi: 10.1002/mrm.26803

Figure 7. Coil performance as a percentage of the UISNR vs. number of z-directed electric dipoles in the array, for different values of main magnetic field strength and voxel position.

Figure 7

Results are shown for a sample with average size and electrical properties of the human body. A smaller number of dipoles compared to loops could achieve an SNR close to the UISNR. Since electric dipoles combine divergence-free and curl-free current modes, performance was higher at ultra-high field, where the latter contribute considerably to the total UISNR.