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Abstract #1904

3.0 Tesla MRI Common Carotid Wall Shear Stress Quantification: Poiseuille Estimation Versus Non-Linear Fitting of Velocity Data.

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.