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Abstract #0012

3D UTE Yarn Ball Acquisition MRI for Quantification of Lung Water Content

William Quinn Meadus1, Richard Thompson1, Robert Stobbe1, and Christian Beaulieu1

1Biomedical Engineering, University of Alberta, Edmonton, AB, Canada

The goal of this study was to develop and validate a fast, robust and quantitative MRI method for the evaluation of lung water density, for the detection of pulmonary edema. Short lung T2* necessitates ultrashort TE (UTE) acquisitions. We propose a novel optimized UTE Yarn-Ball k-space trajectory that uses ~15% of the pure radial readouts arms required to achieve full sampling. Phantom studies validated accurate water density quantification. A dual-echo approach enabled automated lung tissue segmentation. An optimized Yarn-Ball k-space trajectory yields three-dimensional spin-density weighted lung water images (2.5mm isotropic resolution), without the need for breath-holding, in ~2 minutes.

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