“…Viscous EL has received attention in 4D flow MRI studies. These studies showed that viscous EL was related to abnormal flow in patients with aortic aneurysm [ 9 ], aortic valvular disease [ 10 , 11 ], and repaired tetralogy of Fallot [ 12 ]. Viscous EL might have a potential to predict future plaque progression in coronary artery disease, but measuring EL is a challenge using MRI due to spatial resolution issues.…”