Table 2
List of metasurfaces for improving local SNR for MRI in literature.
| References | Metasurface topology | Magnetic field | Maximum local SNR improvement |
|---|---|---|---|
| [48] | Magnetoinductive lens consisting of two parallel arrays rings | 1.5 T | 200% |
| 3 T | 250% | ||
| [49] | Array of capacitively-loaded copper rings | 1.5 T | 260% |
| [50] | Hexagonal close-packed array of “swiss rolls” | 0.5 T | SNR = 32 with the metasurface |
| [51] | Brass wires embedded in a high permittivity low loss medium | 1.5 T | 330% |
| [52] | Active metasurface of brass wires embedded in a high permittivity low loss medium | 1.5 T | 250% |
| [53] | Array of metallic helices | 1.5 T | 400% |
| [54] | Two size zig zag copper strips immersed in water | 7 T | 200% |
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