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Abstract #0542

Sequential and Deep Multi-Pool CEST MR Fingerprinting in In-Vivo Tumor-Bearing Mice

Or Perlman1, Ouri Cohen2, Hirotaka Ito3, Hiroshi Nakashima3, E. Antonio Chiocca3, Matthew S. Rosen1, and Christian T. Farrar1

1A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, United States, 2Memorial Sloan Kettering Cancer Center, New York, NY, United States, 3Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, United States

Magnetic resonance fingerprinting (MRF) was recently suggested for fast and quantitative chemical exchange saturation transfer (CEST) imaging. However, for in-vivo pathologies, multiple tissue parameters will vary simultaneously, thereby reducing the schedule discrimination ability and increasing the reconstruction time. Herein, we propose the sequential utilization of three MRF acquisition schedules and their incorporation in deep-learning reconstruction networks (DRONE). The technique outputs 6 quantitative maps (water, semi-solid, and amide pool properties) with acquisition and reconstruction times of 365s and <200ms, respectively. The method was evaluated in a longitudinal brain-tumor mouse study, yielding comparable parameter values to ground-truth and traditional Z-spectrum evaluations.

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