Abstract #0339

Phase-Contrast MRI with Hybrid One- and Two-sided Flow-Encoding and Velocity SPectrum SepAration (HOTSPA)

Da Wang^1,2, Jiaxin Shao¹, Daniel B. Ennis^1,2,3, and Peng Hu^1,2

¹Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States, ²Biomedical Physics Interdepartmental Graduate Program, University of California, Los Angeles, Los Angeles, CA, United States, ³Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, United States

In this work, we propose a new and more efficient flow encoding and velocity calculation strategy for PC-MRI using a temporal modulation technique to double the temporal resolution or reduce the scan time by 50%. This is the first study to examine a temporal modulation strategy for an under-sampled M1-space (gradient first moment space including FC, FEx, FEy and FEz encoding steps). Our strategy can be combined with conventional acceleration techniques, i.e. parallel imaging and compressed sensing, to further shorten the scan time of PC-MRI.

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