Meeting Banner
Abstract #3773

Physiological artifact suppression in multi-shot data using covariance-map-enhanced navigator correction

Jacco A de Zwart 1 , Peter van Gelderen 1 , and Jeff H Duyn 1

1 Advanced MRI, LFMI, NINDS, National Institutes of Health, Bethesda, MD, United States

MR signal stability in brain, and thus image quality, is significantly affected by physiological noise, predominantly from the respiratory cycle. Navigator echoes or real-time shimming (dynamic updating of shims and center frequency) can be used to compensate or correct for this but have practical limitations. We propose the incorporation of a covariance map of temporal signal fluctuations, acquired separately, in a navigator-based correction strategy. This covariance map describes the spatial distribution of the temporal field changes that are derived from navigator phase evolution during the multi-shot experiment.

This abstract and the presentation materials are available to members only; a login is required.

Join Here