Archives of Acoustics, 35, 1, pp. 3-11, 2010

Two-point method for arterial local pulse wave velocity measurement by means of ultrasonic RF signal processing

Zbigniew TRAWIŃSKI
Institute of Fundamental Technological Research, Department of Ultrasound, Polish Academy of Sciences
Poland

The aim of this paper is to describe a non-invasive method of examination of the local pulse wave velocity. The measurements were carried out in the model of the artery immersed in a water tank. Two synchronized ultrasonic apparatus VED with the ultrasonic radio frequency echoes acquisition system were used for evaluation of the arterial elasticity. The zero-crossing method was used for determination of the diameter changes of the artery model. The transit time between the waveforms of instant artery diameter was measured at two points of the artery model, separated by the distance of 5 cm. The transit time was determined using the criteria of similarity of the first derivatives of the raising slopes of the curves describing instant vessel's diameter changes. The pulse wave velocity obtained by the proposed two-point method was compared with the results obtained by the one-point method based on the modified Bramwell-Hill relation.
Keywords: ultrasound; local pulse wave velocity; model of artery
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Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).

References

Bots M.L., Dijk J.M., Oren A., Grobbee D.E. (2002), Carotid Intima-media thickness, arterial stiffness and risk of cardiovascular disease: Current evidence, Journal of Hypertension, 20, 12, 2317–2325.

Bramwell J.C., Hill A.V. (1922), The Velocity of the Pulse Wave in Man, Proceedings of the Royal Society, London s. B, 93, 298–306.

Filipczynski L., Powałowski T., Pensko B., Trawinski Z. (1988), A noninvasive ultrasonic method for estimation of the elasticity of the common carotid artery, Proceedings of the 13th Annual Meeting of the DOPPLER Club, Liege, 22–23 April 1988, L.E. Jonnart [Ed.], M.D., 54–68.

Meinders J.M., Hoeks A.P.G. (2004), Simultaneous assessment of diameter and pressure waveforms in the carotid artery, Ultrasound in Medicine & Biology, 30, 2, 147–154.

Powałowski T., Trawinski Z. (1994), Noninvasive evaluation of the elasticity of common carotid artery wall, Archives of Acoustics, 19, 4, 451–465.

Powałowski T., Trawinski Z. (2004), Non-invasive ultrasonic examination of the local pulse wave velocity in the common carotid artery, Archives of Acoustics, 29, 4, 597–606.

Powałowski T., Trawinski Z., Lamers A. (2005), Ultrasonic examinations of the local pulse velocity in the human common carotid artery by means of different methods, Archives of Acoustics, 30, 4 (Suplement), 75–78.

Rabben S.I., Bjaerum S., Sorhus, V., Torp H. (2002), Ultrasound-based vessel wall tracking: an autocorrelation technique with RF center frequency estimation, Ultrasound in Medicine & Biology, 28, 4, 507–517.

Trawinski Z. (2000), Elasticity and input impedance examinations in human vessel system by means of ultrasound [in Polish: Badanie elastycznosci i wejsciowej impedancji w układzie naczyniowym człowieka na podstawie pomiarów ultradzwiekowych], Doctor thesis, IPPT PAN, Warszawa.