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Abstract #3325

Single Half-Cylinder B0 Shim Coil for the Knee

Mingdong Fan1, Sugandima Nishadi Weragoda1, Benjamin Cheung1, Michael Martens1, Labros Petropoulos2, Xiaoyu Yang2, Shinya Handa2, Noah Deetz2, Hiroyuki Fujita2, and Robert Brown1
1Case Western Reserve University, Cleveland, OH, United States, 2Quality Electrodynamics, Mayfield, OH, United States

The void under the knee of a supine patient leads to localized B0 magnetic field distortions due to air-tissue susceptibility differences. To cancel this local artifact, low-order harmonic shims are inadequate, but a single local shim coil can produce higher harmonic suppression. A half-cylinder version wrapped on the outside of the RF coil has been constructed and used to obtain in vivo data consistent with the magnetic field simulations. The detailed results support the possibility of an effective knee shimming approach.

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