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. 2022 Mar 27;20:159. doi: 10.1186/s12951-022-01337-5

Fig. 2.

Fig. 2

The gradient MF generation device for the in vivo experiment in rats. a The MF generating device composed of four circular neodymium magnets. b Each two circular magnets form a group, with a 15 mm gap between the two groups. Rats were placed inside circular magnets to expose the sciatic nerve to a gradient MF. There is a large MF gradient inside the circular neodymium magnets. The maximum gradient value appears in the gap between the two groups of circular magnets. d A gradient MF of 16.0 T/m is generated in the MF generator