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Abstract #3655

Accelerating water-fat separation for intragastric fat distribution with a signal model-based dictionary

Dian Liu 1 , Jelena Curcic 1,2 , Andreas Steingoetter 1,2 , and Sebastian Kozerke 1

1 Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland, 2 Division of Gastroenterology and Hepatology, University Hospital Zurich, Zurich, Switzerland

For quantifying the dynamics of gastrointestinal fat digestion, imaging efficiency of multipoint gradient echo methods must be improved. A reconstruction of fat fraction (FF) maps for parallel MRI using signal model-based dictionaries is proposed and studied for the prospective and retrospective data acquisition of intragastric fat distribution, resulting in improved reconstruction. The performance is subject to variations due to different echo times. FF of undersampled data was found to be in good agreement with FF of the fully sampled acquisition. Underestimation occurred at higher fat fractions, which is however tolerable in terms of the relative error.

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