Hemodynamics in Portal Venous Based on 9.4 T Magnetic Resonance Velocimetry and Numerical Simulations

Portal vein stenosis is one of the common complications after liver transplantation in children. Accurate hemodynamic assessment is crucial for predicting the risk of complications after liver transplantation. In order to predict the location of portal vein thrombosis after liver transplantation surgery, single-outlet and three-outlet vascular models were reconstructed from computed tomography images by commercial software MIMICS. The velocity field was measured using a 9.4 T magnetic resonance imaging scanner. Based on the experiment data of magnetic resonance velocimetry, computational fluid dynamics was verified, validated and then used to study the pressure and shear stresses on the wall of the two portal vein models. The simulation results can serve for the clinical prediction of early thrombosis after liver transplantation in portal vein.