Abstract #0214

Initial imaging experience with a head gradient (MAGNUS) at 3.0T operating at 200 mT/m and 500 T/m/s

Thomas KF Foo¹, Ek T Tan¹, Mark Vermilyea¹, Yihe Hua¹, Eric Fiveland¹, Joseph Piel¹, Keith Park¹, Justin Ricci¹, Paul Thompson¹, Gene Conte¹, Matthew Tarasek¹, Desmond TB Yeo¹, David Lee², J Kevin DeMarco³, Robert Shih³, Maureen Hood^3,4, Heechin Chae⁵, and Vincent B Ho^3,4

¹GE Global Research, Niskayuna, NY, United States, ²GE Healthcare, Florence, SC, United States, ³Walter Reed National Military Medical Center, Bethesda, MD, United States, ⁴Uniformed Services University of the Health Sciences, Bethesda, MD, United States, ⁵Ft. Belvoir Community Hospital, Ft. Belvoir, VA, United States

Healthy volunteer subjects were safely imaged in a 3.0 T MRI system with an ultra-high performance head-gradient coil. The MAGNUS coil operates at 200 mT/m and 500 T/m/s, simultaneously on all 3-axes, and has a patient (head) bore diameter of 37-cm. Substantial reduction in pulse sequence TE, TR, and echo-planar imaging echo spacing was achieved with observable improvement in image quality. The design enabled the achievement of higher peripheral nerve stimulation thresholds compared to that for whole-body gradient coils.

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