This work identifies mechanical resonances of the gradient coil system as a source of increased spatially linear and quadratic phase offsets. Mechanical resonance frequencies were identified by mobile phone audio recordings from inside the scanner room and compared to the gradient modulation transfer function. Results demonstrate that optimal TE reduces phase ramps by a factor of 15 and optimal TR removes the spatially quadratic phase offset.
This abstract and the presentation materials are available to members only; a login is required.