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. Author manuscript; available in PMC: 2020 Dec 1.
Published in final edited form as: Commun Phys. 2019 Mar 26;2(1):35. doi: 10.1038/s42005-019-0135-7

Fig. 5. Experimental results with and without metamaterials.

Fig. 5.

(a) Experimental setup of metamaterial array beneath 3D printed magnetic resonance imaging (MRI) phantom containing 2% agar gel. (b) MRI image in presence of 4 × 4 metamaterial array with unit cell diameter of 3 cm (transmission radio frequency (RF) power of MRI experiment reduced, see Methods; the dashed line used for comparison of signal-to-noise ratio (SNR) in (d)). (c) Control MRI image in the absence of metamaterial array (transmission RF energy not reduced, see Methods). Scale bars correspond to 2 cm in (b) and (c). (d) Comparison of SNR enhancement ratios of experimental, simulation, and calculation results. The bars for experimental results show the standard deviation of the measured SNR enhancement ratio.