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Abstract #3821

k-T Accelerated 4D Flow MRI in the Aorta: Effect on Scan Time, Flow Quantification and Analysis of Wall Shear Stress

Bernd A. Jung1, Michael Markl2, Pegah Entezaril2, Riti J. Mahadevia2, Susanne Schnell2

1Dept. of Radiology, Medical Physics, University Medical Center, Freiburg, Germany; 2Dept. of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States

The purpose of this study was to evaluate the utility of k-t parallel imaging for the acceleration of aortic 4D-flow MRI by systematically investigating the impact of different acceleration factors R and coil elements on quantification of hemodynamics parameters such as blood flow and wall shear stress. K-t accelerated 4D-flow MRI was performed in 10 healthy volunteers with R=3, 5 and 8 using a 12-channel and a 32-channel receiver coil and compared to conventional parallel imaging (GRAPPA, R=2). Data analysis included 3D blood flow visualization and quantification of peak velocities, flow rates and wall shear stress in different aortic locations.