Abstract #0151

Water/fat separated Echo Planar Time-resolved Imaging (EPTI) for efficient distortion-free multi-contrast imaging

Zhangxuan Hu^1,2, Zijing Dong^1,2, Timothy G. Reese^1,2, Lawrence L. Wald^1,2,3, Jonathan R. Polimeni^1,2,3, and Fuyixue Wang^1,2

¹Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA, United States, ²Department of Radiology, Harvard Medical School, Boston, MA, United States, ³Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, United States

Synopsis

Keywords: Fat & Fat/Water Separation, Fat

Motivation: Echo Planar Time-resolved Imaging (EPTI) can produce distortion- and blurring-free multi-echo images with high efficiency. For its broader application such as in body imaging, the challenge of fat suppression/separation needs to be addressed.

Goal(s): Achieving efficient water/fat separation using EPTI for high-quality fast multi-contrast/quantitative imaging in the presence of fat tissues.

Approach: In this study, water/fat separated EPTI (WFS-EPTI) was proposed to achieve this by: (1) designing a novel in-phase and out-of-phase EPTI acquisition and encoding scheme; and (2) adopting a k-space-based water/fat separation method.

Results: Experimental results demonstrated the efficacy of WFS-EPTI for water/fat separation and fat-robust distortion-free multi-contrast/quantitative imaging.

Impact: The proposed WFS-EPTI effectively separates water and fat signals, while providing efficient acquisition of high-resolution, distortion-free multi-contrast images and quantitative maps. It can extend EPTI to a broader range of applications.

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