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Abstract #4596

Artifact correction in spiral trajectory with high gradient performance

Daehun Kang1, Uten Yarach1, Joshua D Trzasko1, Myung-Ho In1, Erin M Gray1, Ek Tsoon Tan2, Nolan K Meyer1, Thomas K Foo2, Yunhong Shu1, John Huston1, and Matt A Bernstein1

1Department of Radiology, Mayo Clinic, Rochester, MN, United States, 2GE Global Research, Niskayuna, NY, United States

A low-cryogen, compact 3T MRI is equipped with high performance gradients, of which increased maximum gradient amplitude and slew rate can improve MR image quality of spiral trajectory to reduce susceptibility and off-resonance effect. However, use of the higher slew rate and gradient strength with an Archimedean spiral trajectory can lead to rotation artifacts and a local blurring. In this work, we corrected those artifacts with using a dynamic field camera and with attention to the azimuthal Nyquist sampling criterion.

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