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Abstract #0310

Brain imaging with a Dedicated Asymmetric Head-only Gradient Coil without Peripheral Nerve Stimulation at 500 T/m/s

Seung-Kyun Lee 1 , Jean-Baptiste Mathieu 1 , Joseph E Piel 1 , Christopher J Hardy 1 , John F Schenck 1 , Ek Tsoon Tan 1 , Eric Budesheim 1 , Eric Fiveland 1 , Keith Park 1 , Kenneth Rohling 1 , Yihe Hua 2 , Jian Lin 2 , Matthew A Bernstein 3 , John Huston III 3 , Yunhong Shu 3 , and Thomas K-F Foo 1

1 GE Global Research, Niskayuna, NY, United States, 2 GE Global Research, China Technology Center, Shanghai, China, 3 Mayo Clinic, Rochester, MN, United States

A dedicated head-only gradient set with asymmetric transverse coils and a hollow-conductor z coil was built and tested. The coil incorporated force-balanced, torque-balanced, and eddy current-controlled design. The coil was tested inside a conventional whole-body 3T magnet to assess image quality and peripheral nerve stimulation (PNS). The gradient was integrated with a custom-built birdcage transmit/receive coil and a 32-channel receiver array for in-vivo imaging. Initial results demonstrated high quality brain images with transverse gradients at 80 mT/m and 500 T/m/s (simultaneously) without PNS.

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