Toward an accurate estimation of wall shear stress from 4D flow magnetic resonance downstream of a severe stenosis.

Pascal Corso^1,2, Jonas Walheim^3,4, Hannes Dillinger^3,4, George Giannakopoulos⁵, Utku Gülan⁶, Christos Emmanouil Frouzakis⁵, Sebastian Kozerke^3,4, Markus Holzner^7,8

¹Institute of Environmental Engineering, ETH Zurich, Zurich, Switzerland.

²ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland.

³Institute for Biomedical Engineering, ETH Zurich, Zurich, Switzerland.

⁴University of Zurich, Zurich, Switzerland.

⁵Aerothermochemistry and Combustion Systems Laboratory, ETH Zurich, Zurich, Switzerland.

⁶Hi-D Imaging, Zurich, Switzerland.

⁷Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zurich, Switzerland.

⁸Swiss Federal Institute of Aquatic Science and Technology Eawag, Zurich, Switzerland.

PubMed DOI

Abstract

PURPOSE: First, to investigate the agreement between velocity, velocity gradient, and Reynolds stress obtained from four-dimensional flow magnetic resonance (4D flow MRI) measurements and direct numerical simulation (DNS). Second, to propose and optimize based on DNS, 2 alternative methods for the accurate estimation of wall shear stress (WSS) when the resolution of the flow measurements is limite…

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