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Abstract #1659

Iterative Field Map Extraction for Spiral Water-fat Imaging

Dinghui Wang 1 , Nicholas R. Zwart 1 , Zhiqiang Li 1 , Michael Schr 1,2 , and James G. Pipe 1

1 Neuroimaging Research, Barrow Neurological Institute, Phoenix, AZ, United States, 2 Philips Healthcare, Cleveland, OH, United States

Spiral water-fat imaging suffers from blurring caused by B0 inhomogeneity and chemical shift of fat. Long spiral readout is efficient but often results in blurred and erroneous B0 field map at the interface of water and fat, and/or in regions of rapidly varying B0. We propose two approaches to iteratively correct and refine the initial field map obtained from Dixon water-fat imaging. Both methods employ a previously presented approach that simultaneously separates and deblurs water and fat. In vivo experiment results have demonstrated the feasibility of both approaches.

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