Introduction to tissue shear wave elastography

• Autorzy: Nowicki A. , Dobruch-Sobczak K.
• Języki publikacji: EN

Abstrakty

EN

Ultrasonic elastography is a technique allowing imaging of the elastic properties of tissue. There are two basic techniques of elastographic imaging; compressional - displaying the evaluation of tissue deformation under the external stress; and dynamic, tracking the propagation velocity of the shear wave generated by the acoustic radiation force. Soft tissue bulk modulus varies, from a few to several GPa, whereas the shear modulus is significantly smaller, not exceeding a few hundred Pa for adipose tissue, breast or liver, up to several hundred kPa for “hard” tissue. Forces generated in the tissue due to the external, axial piston-like stresses depend mainly on the shear modulus. In Shear Wave Elastography, long, several tens of microseconds, ultrasonic pulses successively focused at several depths are sent: generating a conical wave front moving with the supersonic velocity, depending on the tissue stiffness. Velocity of propagation of shear wave depends on the shear modulus μ and the modulus of elasticity E of the examined tissue is equal to E=3μ.

Słowa kluczowe

EN

elastography; ultrasonic imaging; thyroid; breast

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2017
• Tom: Vol. 20
• Strony: 129--138
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Nowicki A.

• Institute of Fundamental Technological Research, Polish Academy of Sciences Pawinskiego 5B, 02-106 Warsaw, Poland

autor

Dobruch-Sobczak K.

• Institute of Fundamental Technological Research, Polish Academy of Sciences Pawinskiego 5B, 02-106 Warsaw, Poland

Bibliografia

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• [6] W.I.Nyborg, Acoustic streaming, In Mason, W.P., ed., Physical acoustics, IIB, New York: Academic Press, 265-331, 1965.
• [7] A.Sarvazyan, O.Rudenko, S.Swanson, J. Fowlkes, Shear wave elasticity imaging: a new ultrasonic technology of medical diagnostics, Ultrasound Med.Biol., 24(9), 1419-1435, 1998.
• [8] S.Timoshenko and J.N.Goodier, Theory of Elasticity, McGraw-Hill, 1987.
• [9] P.N.T. Wells and H-D. Liang, Medical ultrasound: imaging of soft tissue strain and elasticity, J. R. Soc. Interface, p.1-29, 2012.
• [10] M.W.Zemansky, and R.H.Dittman, Heat and Thermodynamics, 7th Edn., McGraw-Hill, New York, 1997.

Uwagi

PL

Opracowanie w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).