Abstract #4226

Adaptive iPRES Body Coil Array with Microelectromechanical System Switches for Simultaneous Imaging and Localized B0 Shimming

Yixin Ma^1,2, Julia Bresticker^1,2, Dean Darnell^1,2, Fraser Robb³, Allen Song^1,2, and Trong-Kha Truong^1,2

¹Brain Imaging and Analysis Center, Duke University, Durham, NC, United States, ²Medical Physics Graduate Program, Duke University, Durham, NC, United States, ³GE Healthcare, Aurora, OH, United States

The adaptive iPRES(N) coil design can effectively shim localized B₀ inhomogeneities, while requiring one power supply per RF coil element and 4 MEMS switch packages to direct the DC current among the shim loops. Here, this design is improved by using only one 6-channel MEMS switch package per RF coil element and a SPI-interface to control all of them, which requires minimal space and a few command lines. In vivo experiments with an adaptive iPRES(2) body coil array demonstrated that it can reduce B₀ inhomogeneities and EPI distortions more effectively than an iPRES(1) coil array, without requiring additional power supplies.

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