Abstract #3563

Adaptive Integrated Parallel Reception, Excitation, and Shimming (iPRES) with Bipolar Junction Transistors.

Dean Darnell¹, Trong-Kha Truong¹, and Allen Song¹

¹Brain Imaging and Analysis Center, Duke University, Durham, NC, United States

An integrated parallel reception, excitation, and shimming coil array with N DC shim loops within each RF coil, termed iPRES(N), improves the shimming of local B₀ inhomogeneities relative to the original iPRES design with one loop per coil, but requires N times more power supplies which adds complexity and cost. A new adaptive iPRES design is proposed that uses bipolar junction transistors to generate different DC current paths, and hence different B₀ fields for local shimming, within each coil using one power supply per coil, thus maintaining the shimming flexibility of iPRES(N) while reducing the number of power supplies.

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