Comparison of Four-Dimensional Flow Magnetic Resonance Imaging and Particle Image Velocimetry to Quantify Velocity and Turbulence Parameters

Although recent advances of four-dimensional (4D) flow magnetic resonance imaging (MRI) has introduced a new way to measure Reynolds stress tensor (RST) in turbulent flows, its measurement accuracy and possible bias have remained be revealed. The purpose this study was compare the 4D MRI particle image velocimetry (PIV) terms velocity turbulence quantification. Two difference rates 10 20 L/min through 50% stenosis were measured with both PIV MRI. Not only but also parameters such as kinetic energy production quantitatively compared. Results shows that well agreed PIV, showing linear regression slopes two methods are 0.94 0.89, respectively. mapping qualitatively quantitative comparison overestimates RST 1.44 1.66, In study, we demonstrate visualize quantify not tensor. However, further optimization for better might remained.