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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