TY - GEN
T1 - Frequency dispersion of wave velocity in arterial vessels
AU - Zhang, Xiaoming
AU - Fatemi, Mostafa
AU - Greenleaf, James F.
PY - 2004
Y1 - 2004
N2 - Pulse wave velocity in an artery is a very important indicator of the stiffness and disease of the artery. Pulse wave velocity in an artery is measured with the standard pulse delay technique. However, the precise timing of the pressure wave is difficult due to the presence of reflected waves. In this paper we propose to generate a wave of a few hundred Hz in an artery by localized radiation force of ultrasound. This wave attenuates very quickly, in a few centimeters, due to the viscoelasticity of the artery and surrounding tissues. Therefore, no reflected wave exists. The wave velocity can be measured accurately by the phase change versus distance. The frequency dispersion of wave velocity is also described because the pulse wave velocity method does not consider dispersion. A new theoretic model is proposed to investigate the wave propagation in arteries. The model is substantiated by in vitro experiments.
AB - Pulse wave velocity in an artery is a very important indicator of the stiffness and disease of the artery. Pulse wave velocity in an artery is measured with the standard pulse delay technique. However, the precise timing of the pressure wave is difficult due to the presence of reflected waves. In this paper we propose to generate a wave of a few hundred Hz in an artery by localized radiation force of ultrasound. This wave attenuates very quickly, in a few centimeters, due to the viscoelasticity of the artery and surrounding tissues. Therefore, no reflected wave exists. The wave velocity can be measured accurately by the phase change versus distance. The frequency dispersion of wave velocity is also described because the pulse wave velocity method does not consider dispersion. A new theoretic model is proposed to investigate the wave propagation in arteries. The model is substantiated by in vitro experiments.
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M3 - Conference contribution
AN - SCOPUS:17144400825
SN - 0780383885
SN - 9780780383883
T3 - 2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano
SP - 1347
EP - 1350
BT - 2004 2nd IEEE International Symposium on Biomedical Imaging
T2 - 2004 2nd IEEE International Symposium on Biomedical Imaging: Macro to Nano
Y2 - 15 April 2004 through 18 April 2004
ER -