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
Neuroimaging Research, Barrow Neurological
Institute, Phoenix, AZ, United States,
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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