Annals of Biomedical Engineering

, Volume 30, Issue 8, pp 1020–1032 | Cite as

Quantification of Wall Shear Stress in Large Blood Vessels Using Lagrangian Interpolation Functions with Cine Phase-Contrast Magnetic Resonance Imaging

  • Christopher P. Cheng
  • David Parker
  • Charles A. Taylor
Article

Abstract

Arterial wall shear stress is hypothesized to be an important factor in the localization of atherosclerosis. Current methods to compute wall shear stress from magnetic resonance imaging (MRI) data do not account for flow profiles characteristic of pulsatile flow in noncircular vessel lumens. We describe a method to quantify wall shear stress in large blood vessels by differentiating velocity interpolation functions defined using cine phase-contrast MRI data on a band of elements in the neighborhood of the vessel wall. Validation was performed with software phantoms and an in vitro flow phantom. At an image resolution corresponding to in vivo imaging data of the human abdominal aorta, time-averaged, spatially averaged wall shear stress for steady and pulsatile flow were determined to be within 16% and 23% of the analytic solution, respectively. These errors were reduced to 5% and 8% with doubling in image resolution. For the pulsatile software phantom, the oscillation in shear stress was predicted to within 5%. The mean absolute error of circumferentially resolved shear stress for the nonaxisymmetric phantom decreased from 28% to 15% with a doubling in image resolution. The irregularly shaped phantom and in vitro investigation demonstrated convergence of the calculated values with increased image resolution. We quantified the shear stress at the supraceliac and infrarenal regions of a human abdominal aorta to be 3.4 and 2.3 dyn/cm2, respectively. © 2002 Biomedical Engineering Society.

PAC2002: 8761-c, 8719Uv

Atherosclerosis Hemodynamics Cine phase contrast Pulsatile flow 

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Copyright information

© Biomedical Engineering Society 2002

Authors and Affiliations

  • Christopher P. Cheng
    • 1
  • David Parker
    • 1
  • Charles A. Taylor
    • 1
    • 2
  1. 1.Department of Mechanical EngineeringStanford UniversityStanford
  2. 2.Department of SurgeryStanford UniversityStanford

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