Dual-Venc is a technique for MR flow imaging which uses two Vencs to acquire a cardiac cycle, improving diastolic data. Dual Venc 4D flow with spiral readouts was used to image the outflow tract and through the aortic valve in both phantom and patients with severe aortic stenosis. In-vitro model of the aortic arch included a calcific polymeric valve which behaved physiologically. The results of in-vitro and in-vivo scans show that 4D Spiral Dual-Venc Flow is comparable in results to 4D Cartesian Flow in systole, while improving diastolic data, and reducing scan time by 30% to 50%.
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