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Abstract #4194

Comparison of Device Vibration Induced by Trapezoidal and Sinusoidal Gradient Waveforms

Christine M. Wawrzyn1, William B. Handler1, Colin M. McCurdy1, and Blaine A. Chronik1

1The xMR Labs, Physics and Astronomy, Western University, London, ON, Canada

Gradient induced vibration of a steel disk due to trapezoidal and sinusoidal gradient waveforms was measured at varying frequencies at 3 T. Results show displacement increased monotonically with decreasing frequency but peak acceleration, scaled to the peak gradient field, remained consistent for all experimental conditions. Sinusoidal dB/dt exposure as a function of frequency represents a practical conservative exposure condition for testing dB/dt-induced vibration in conductive devices during MRI.

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