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Abstract #0571

Rapid Water-Fat Separation using 3D VFA GRASE with Phase-Independent Reconstruction

Hahnsung Kim1 and Jaeseok Park2

1Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon, Korea, Republic of, 2Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Korea, Republic of

Most water-fat separation methods based on chemical shift effect require multiple image acquisitions at different echo times, which prolong the total scanning time. Recently, to resolve aforementioned problems, variable-flip-angle (VFA) fast/turbo SE is developed. In addition, partial Fourier and/or parallel imaging techniques are incorporated with VFA fast/turbo SE imaging to speed up acquisition time but directly trade off with signal-to-noise ratio. To avoid multiple measurements and to tackle spatially variant noise amplification, we develop a novel water-fat separation method employing: 1) single-slab 3D VFA GRASE using phase-encoding blips for imaging time efficiency, 2) phase-independent reconstruction exploiting spatially complementary information along the echo direction, and 3) phase-corrected water-fat separation method using robust field distribution.

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