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Abstract #1383

A finite-difference model for the analysis of Acoustic Noise generated by Gradient Coil switching

Liyi Kang 1 , Zhifeng Chen 1 , Zhiqian Ye 1 , Feng Liu 2 , and Ling Xia 1

1 Department of Biomedical Engineering, Zhejiang University, Hangzhou, Zhejiang, China, 2 School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Queensland, Australia

In this work, a force-vibration-noise model has been developed for the analysis of gradient switching induced acoustic noise in MRI. The acoustic model is based on the finite difference method, and it can quantitatively evaluate the acoustic noise produced by typical gradient switching procedure. With the Tikhonov regularization based optimization technique, new gradient coils are designed; compared with conventional coils, the new gradient coils offer excellent magnetic field linearity and the sound pressure level is decreased by about 10%.

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