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Abstract #0962

Real-time B0 concomitant field compensation for a compact 3T MR scanner with asymmetric transverse gradients

Paul Weavers1, Shengzhen Tao1, Joshua D Trzasko1, Yunhong Shu1, John Huston III1, Louis M Frigo2, Erin M Gray1, Thomas K.F. Foo3, and Matt A Bernstein1

1Radiology, Mayo Clinic, Rochester, MN, United States, 2GE Healthcare, Waukesha, WI, United States, 3MRI, GE Global Research, Niskayuna, NY, United States

A prototype, high-performance gradient system capable of 80 mT/m and 700 T/m/s with asymmetric design has been installed. Zeroth-order concomitant field terms endemic to MRI systems employing asymmetric gradient designs cause blurring and ghosting in spiral scans, as well as image quality degradation in fast-spin-echo imaging. The theory is reviewed, and a real-time hardware compensation is demonstrated to correct for the effect.

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