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RESEARCH PAPERS

Velocity Profiles in Stenosed Tube Models Using Magnetic Resonance Imaging

[+] Author and Article Information
S. E. Rittgers, Ding-yu Fei

Biomedical Engineering Program, Medical College of Virginia, Virginia Commonwealth University, Richmond, Va. 23298-0694

K. A. Kraft, P. P. Fatouros, P. R. S. Kishore

Department of Radiology, Medical College of Virginia, Virginia Commonwealth University, Richmond, Va. 23298-0694

J Biomech Eng 110(3), 180-184 (Aug 01, 1988) (5 pages) doi:10.1115/1.3108428 History: Received August 26, 1987; Revised March 28, 1988; Online June 12, 2009

Abstract

A time-of-flight MRI velocity measurement technique is evaluated against corresponding LDV measurements in a constriction tube model over a range of physiologic flow conditions. Results from this study show that MR displacement images can: 1) be obtained within both laminar and turbulent jets (maximum stenotic Re≅4,200), 2) measure mean jet velocities up to 172 cm/s, and, 3) detect low forward and reverse stenosis (0≤L/D≤2). Regions between the jet termination point and re-establishment of laminar flow (Re≥1500, ≥1000, and ≥110 downstream of 40, 60, and 80 percent stenosis, respectively) cannot presently be detected by this technique.

Copyright © 1988 by ASME
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