Raphael Duivenvoorden1, Eric de Groot, Ed van Bavel2, Ramsi Amri, Erik Stroes, J. Lameris3, J. Kastelein, Aart J. Nederveen3
1Vascular Medicine, Academic Medical Center, Amsterdam, Netherlands; 2Medical Physics, Academic Medical Center; 3Radiology, Academic Medical Center
Wall shear stress (WSS) can be calculated by using MRI flow measurements. Commonly WSS is estimated based on Poiseuille flow assuming a parabolic velocity profile. In arteries in vivo this assumption is not valid. We therefore developed a method that calculated the velocity gradient near the wall using a non-linear fit of the MRI velocity data. This results in a more accurate determination of both systolic and diastolic wall shear stresses.
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