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Abstract #2946

Accurate MR-based Wall Shear Stress Measurements in Fully Developed Turbulent Flow Using the Clauser-plot Method

Nina Shokina1, Waltraud B. Buchenberg1, Marius Menza1, Andreas Bauer2, Gabriel Teschner3, Cameron Tropea2, Herbert Egger3, Juergen Hennig1, and Axel Joachim Krafft1

1Radiology, Medical Physics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany, 2Institute for Fluid Mechanics and Aerodynamics, Department of Mechanical Engineering, Technische Universitaet Darmstadt, Darmstadt, Germany, 3Institute for Numerical Analysis and Scientific Computing, Department of Mathematics, Technische Universitaet Darmstadt, Darmstadt, Germany

Wall shear stress (WSS) quantifies the frictional force that flowing blood exerts on a vessel wall and can be estimated from MR-based flow measurements via numerical differentiation. Correct assessment of WSS remains difficult because of the limited spatial resolution, partial volume effects and the per-se unknown position of the wall. It has been shown that such WSS evaluations tend to underestimate. We investigate an alternative method to evaluate WSS using the Clauser-plot method – a graphical way to estimate the WSS in fully developed turbulent stationary flow. We briefly describe the Clauser-plot method and present experimental validation in a straight tube.

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