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

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Fig. 12 — Photographs of various metamaterial-based prototypes for MRI. (Left) A metamaterial lens based on split rings [61], (centre) a structure based on conductive rods within a high permittivity liquid [67], and (right) the first metamaterial MRI structure published based on “swiss rolls” [65]