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Abstract #1264

Highly accelerated Multi-Directional Velocity Encoding 4D Flow MRI: feasibility and preliminary results

Henrik Haraldsson1, Evan Kao1, Yan Wang1, David Saloner1,2, and Jing Liu1

1Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States, 2Veteran Affairs Medical Center, San Francisco, CA, United States

Velocity-to-noise ratio in 4D flow improves with low velocity encoding (VENC), but is usually compromised to prevent velocity aliasing. Dual-VENC and multi-directional velocity encoding schemes have been proposed to circumvent these issues, but result in an increased acquisition time. In this study, we developed a motion-robust highly accelerated 4D flow acquisition with multi-directional velocity encodings to target applications with a wide range of velocities in clinically acceptable acquisition times, for applications such as imaging of abdominal aneurysms, and simultaneous assessment of cardiac tissue phase mapping and intracardiac blood flow.

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