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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 3. Coil performance as a percentage of the UISNR vs. number of loops in the array, for different values of main magnetic field strength and voxel position.

Figure 3

Results are shown for samples with average size and electrical properties of the human body. For fields up to 3T, a small number of loops was sufficient to approach the UISNR closely at the center, whereas for an intermediate voxel a large array was needed to obtain a similar performance. At ultra-high field, even with a large number of loops, only a limited performance can be achieved.