We propose a free-breathing 4D flow sequence with echo-planar imaging (EPI) and rapid reconstruction to facilitate clinical use. Pulmonary stenosis or atresia is a common anatomic component of congenital conotruncal anomaly. Multi-VENC 4D flow MRI with EPI can simultaneously visualize the pulmonary artery stenosis and associated collaterals of slow flow formed by peripheral arteries. Consequently, all sources of pulmonary blood supply and of the size and morphology of the pulmonary arteries can be completely delineated.
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