Zoran Stankovic1,
2, Jury Fink1, Maximilian Russe1, Michael Markl2,
Bernd A. Jung3
1Dept.
of Radioloy, University Medical Center, Freiburg, Germany; 2Dept. of
Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL,
United States; 3Dept. of Radiology, Medical Physics, University
Medical Center, Freiburg, Germany
The purpose of this study was to evaluate the utility of k-t parallel imaging for the acceleration of 4D flow MRI in the portal system by systematically investigating the impact of different acceleration factors R on quantification of hemodynamics parameters such as peak velocities, flow rates or wall shear stress. K-t-GRAPPA accelerated 4D flow MRI with a temporal resolution of 82 ms was performed in 16 healthy volunteers with R=3, 5 and 8 and compared to conventional GRAPPA with R=2. Additionally, a k-t accelerated scan with R=5 with a temporal resolution of 41 ms was performed.