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Abstract #2585

Simulation of Magneto-Mechanical Coupling in a 3T Head-Only Magnet Design

Dominic M. Graziani1, Seung-Kyun Lee1, Jean-Baptiste Mathieu1, Graeme C. McKinnon2, Thomas K. Foo1, John F. Schenck1

1GE Global Research, Niskayuna, NY, United States; 2Applied Science Lab, GE Healthcare, Waukesha, WI, United States

We present an investigation on the effects of magneto-mechanical coupling on the eddy current in a prototype 3T head only scanner design. Transverse and longitudinal actively shielded gradient coils were modeled in COMSOL along with an aluminum cylinder, fixed at both ends, representing a conducting surface of the magnet. Magneto-mechanical resonance was observed for both gradient designs at frequencies between 2-3.5 kHz. At resonance, the peak gradient strength changed by up to ~10% for the longitudinal gradient and ~1.5% for the transverse gradient.