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Abstract #3856

Eddy current evaluation and minimization for PRESS localized diffusion tensor spectroscopy.

Chris Hanstock1 and Christian Beaulieu1

1University of Alberta, Edmonton, AB, Canada

Gradients used for diffusion spectroscopy require minimization of the eddy currents. Eddy currents impact phase alignment, spectral distortion, and signal amplitude, contributing to error in estimating diffusion coefficients. Strategies have been employed to minimize their effects, including using bipolar gradient pulses around the MRS volume selective pulses. This concept has been further refined to allow multiple eddy current time constants to be minimized by using asymmetric bipolar gradient pairs. An additional oscillatory eddy current may arise as the result of vibration and acoustic noise. We present a simple method for assessing and minimizing the oscillatory eddy currents.

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