Spectra of soft tissue movement in the process of expansion shear waves
Keywords:
acoustic radiation force, Doppler, spectrum of the motion, the shear relaxation, absorption
Abstract
We studied the characteristics of the relaxation movement of the soft tissues after local exposure of
radiation force of a powerful ultrasound pulse. With the help of the Doppler method, a local relaxation
characteristics of the soft tissue with the propagation of shear waves is obtained. It was found that the
spectral composition of the wave packet is gradually losing high-frequency harmonics due to their
absorption of a viscous medium. Comparison of the spectral characteristics at different distances from the
point of the pulse shear excitation allows make assessment the absorption of shear waves in tissues. The
study was conducted on the phantoms of the soft tissues made on the basis of an aqueous solution of
gelatine and glycerine.
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References
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2. Sarvazyan A.P., Rudenko O.V., Swanson S.D., Fowlkes J.B., Emelianov S.Y. Shear Wave Elasticity Imaging: A New Ultrasonic Technology of Medical Diagnostics // Ultrasound Med. and Biol. – 1998. Vol. 24(9). – Р.1419–1435.
3. Bercoff J., Tanter M., Fink M. Supersonic Shear Imaging: A New Technique for Soft Tissue Elasticity Mapping // IEEE Trans. UFFC. – 2004. – Vol. 51(4). - P.396–409.
4. Nightingale K., McAleavey S., Trahey G. Shear Wave Generation using Acoustic Radiation Force: In Vivo and Ex Vivo Results // Ultrasound Med. Biol. – 2003. – Vol.29(12). - P.1715–1723.
5. Chen S., Fatemi M., Greenleaf J.F. Quantifying Elasticity and Viscosity from Measurement of Shear Wave Speed Dispersion // J. Acoust. Soc. Am. – 2004. – Vol. 115(6). - P.2781.
6. Konofagou., Hynynen Localized harmonic motion imaging: Theory, simulations and experiments, Ultrasound Med. Biol. – 2003. – Vol.29. – P.1405–1413.
7. Bercoff J., Tanter M., Muller M., Fink M. The Role of Viscosity in the Impulse Diffraction Field of Elastic Waves Induced by the Acoustic Radiation Force // IEEE Trans. UFFC. – 2004. – Vol. 51(11). - P.1523–1536.
8. Barannik E.A., Girnyk S.A., Tovstiak V.V., Marusenko A.I., Emelianov S.Y., Sarvazyan A.P. Doppler ultrasound detection of shear waves remotely induced in tissue phantoms and tissue in vitro // Ultrasonics. – 2002. – Vol.40. – № 1-8. – P.849-852.
9. Barannik E.A., Girnyk S.A., Tovstiak V.V., Marusenko A.I., Volohov V.A., Emelianov S.Y., Sarvazyan A.P. The influence of viscosity on the shear strain remotely induced by focused ultrasound in viscoelastic media // J. Acoust. Soc. Am. – 2004. - Vol.115. – №5. – P.2989- 2995.
10. Barannik E., Barannik A., Girnyk S., Marusenko A., Volokhov V., Tovstiak V. The estimation of elasticity and viscosity of soft tissues in vitro using the data of Remote acoustic palpation // Ultrasound in Med. Biol. – 2006. – Vol.32. – № 2. - P.211-219.
11. Виноградова М.Б., Руденко О.В., Сухоруков А.П. Теория волн. – 2-е изд. – М.: Наука, 1990. – 432с.
12. Гурбатова С.Н., Руденко О.В. Акустика в задачах М.: Физматгиз, 1995. – 335c.
Cited
How to Cite
Girnyk, S. A., Tolstoluzhsky, D. A., Tovstiak, V. V., & Barannik, E. A. (1). Spectra of soft tissue movement in the process of expansion shear waves. Biophysical Bulletin, 2(25). Retrieved from https://periodicals.karazin.ua/biophysvisnyk/article/view/2770
Section
Medical physics
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