Accurate quantification of both high and low blood velocities is important for clinical decision-making in cardiovascular conditions like aortic valve stenosis. Multi-VENC acquisition is a potential solution. An alternative, without increasing acquisition time, is enabled here by correcting 4D-Flow MRI multi-aliasing along tubular structures. Our solution is based on continuity principles in successive cross-section planes, outperforming the state-of-the-art Laplacian-based solution which only performs single-wrap corrections. The accuracy of proposed method is verified in 4D-Flow MRI of 25 aortic stenotis patients with VENC of 1m/s, where double and triple unwrapping were needed to match velocity values measured by Doppler echocardiography.
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