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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