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. 2022 Apr 26;35(6):875–894. doi: 10.1007/s10334-022-01007-5

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Fig. 18 — (Left) Photographs of a barium-titanate based dielectric pad (ε_r ~ 300) and an artificial dielectric/metasurface etched from a flexible double-sided PCB. (Right) 3 T MR images of three healthy volunteers. Figures

reproduced with permission from Ref. [82]