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Abstract #4434

Flow-Encode Only Phase Contrast Magnetic Resonance Imaging

Erik J. Offerman1, Christopher B. Glielmi2, Michael Markl3, Ioannis Koktzoglou1, 4, Robert R. Edelman1, 3

1Radiology, NorthShore University HealthSystem, Evanston, IL, United States; 2Siemens Healthcare, Chicago, IL, United States; 3Radiology, Feinberg School of Medicine, Northwestern Univeresity, Chicago, IL, United States; 4Radiology, Pritzker School of Medicine, University of Chicago, Chicago, IL, United States

Flow-encode only (FEO) is a new time-resolved phase contrast (PC) method that benefits from a doubled time resolution over the traditional PC method, and does not require background phase correction. FEO quantifies blood-flow velocity by performing only flow-encoded acquisitions. FEO was compared to the traditional PC method in ten volunteers and two patients with peripheral artery disease. Flow measurements were compared between methods with flow profiles, linear correlation, and Bland-Altman analysis. Net flow, peak flow, reverse flow, and average flow metrics were compared as well. Blood-flow measurements showed no statistically significant difference between methods (paired t-test, p > 0.05).