MEMS Reconfigurable Coils

MR compatible micro electro-mechanical switches (MEMS) have the potential to reconfigure coils on-the-fly by enabling/disabling conducting paths and/or circuit components. In this work, we demonstrate the feasibility of reconfiguring (1) coil geometry to switch field of view (FOV) and (2) coil frequency to image multiple nuclei. The geometry reconfiguration (15cm x 11cm vs 8cm x 11cm coil) was realized with two MEMS and frequency reconfiguration (64MHz vs 16MHz) was realized with one MEMS. In each case, two additional MEMS were used in impedance matching circuits to transform coil impedance at each configuration to 50 ohms.

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