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Abstract #0704

Custom MEMS Switch for MR Surface Coil decoupling

Dan Spence 1 and Marco Aimi 2

1 GE Healthcare, Waukesha, Wisconsin, United States, 2 GE Global Research, Niskayuna, New York, United States

A custom MEMS (Micro Electro Mechanical System) switch has been developed to operate in an MR environment. This new switch greatly reduces the power dissipation and simplifies the decoupling design for RF coils. With a standoff voltage greater than 500V, a high isolation impedance, and small resistance, the new switch can directly replace the pin diode tank circuits used in MR coils. The unique features of this switch will enable the simplification of coils as they move to higher densities. Apart from decoupling, other uses of the switch include channel routing, dynamic tuning, T/R switch, and transmit coil applications.

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