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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