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Proceedings Paper

Two-dimentional velocity map of a normal femoral bifurcation and its implications for conventional pulsed Doppler ultrasound
Author(s): Barbrina Dunmire; Kirk W. Beach M.D.; Karl-Heinz Labs; Marla Paun; M. Tschoeppel
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Paper Abstract

The tortuous geometry of the human vasculature system, and pulsatile nature of blood flow, combine to generate a complex 3D blood flow pattern. Conventional Doppler ultrasound, however, provides velocity data only in one dimension - in the direction of the ultrasound beam. 3D velocity results are extrapolated form this one dimensional data by assuming the blood is parallel to the vessel axis. A two-dimensional vector Doppler system has been developed to improve hemodynamic visualization, and investigate the possible errors introduced by conventional Doppler methods. The results from a study of a normal human femoral bifurcation demonstrate that flow is not always para-axial. When flow is para-axial, conventional Doppler methods work as expected: the calculated velocity is independent of interrogation angle. When flow is non-axial, however, the velocity waveforms and measurements vary greatly with interrogation angle.

Paper Details

Date Published: 30 May 2001
PDF: 12 pages
Proc. SPIE 4325, Medical Imaging 2001: Ultrasonic Imaging and Signal Processing, (30 May 2001); doi: 10.1117/12.428202
Show Author Affiliations
Barbrina Dunmire, Univ. of Washington (United States)
Kirk W. Beach M.D., Univ. of Washington (United States)
Karl-Heinz Labs, Univ. Basel (Switzerland)
Marla Paun, Univ. of Washington (United States)
M. Tschoeppel, Univ. Basel (Switzerland)

Published in SPIE Proceedings Vol. 4325:
Medical Imaging 2001: Ultrasonic Imaging and Signal Processing
Michael F. Insana; K. Kirk Shung, Editor(s)

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