Abstract #3185

Feasibility of Abdominal k-t GRAPPA Accelerated Dual-Venc 4D flow MRI in the Setting of Portal Hypertension

Eric James Keller¹, Susanne Schnell¹, James C Carr¹, Michael Markl^1,2, and Jeremy Douglas Collins¹

¹Radiology, Northwestern University, Chicago, IL, United States, ²Biomedical Engineering, Northwestern University, Evanston, IL, United States

Abdominal 4D flow MRI is currently limited by long acquisition times required to capture the wide range of velocities and flows present in the abdomen with separate low and high velocity encoding gradient (venc) acquisitions. By instead using a single 4D flow sequence with two different velocity encodings (dual-venc), we were able to quantify abdominal hemodynamics with similar accuracy in a total of 21% less time. Overall, this is encouraging as it directly addresses scan time, a major limitation of 4D flow MRI, increasing its clinical utility.

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