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Abstract #2420

Dual-venc phase contrast MRI with increased flow encoding efficiency

Maria Aristova1, Alireza Vali1, Hassan Haji-Valizadeh1, Liliana Ma1, Suvai Gunasekaran1, Daniel Kim1, Michael Markl1, and Susanne Schnell1

1Radiology, Northwestern University, Chicago, IL, United States

To decrease scan time while maintaining SNR and velocity dynamic range of dual-venc 2D phase-contrast MRI with 3-directional velocity encoding, the sequence was modified to zero-fill the extremes of k-space in the high-venc (HV) acquisition while collecting fully sampled low-venc (LV). In vitro sensitivity analysis shows antialiasing success over 95% with up to 50% zero-filled HV scans. Preliminary data from a healthy control aorta indicate that antialiasing success approaching 100% can be maintained using HV scans. This promising approach may be extended to further improve flow encoding efficiency in volumetric scans.

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