Numerical solver of acoustic field in simulation of artery wall thickness examinations

• Autorzy: Powałowski T. , Wójcik J. , Trawiński Z.
• Języki publikacji: EN

Abstrakty

EN

The aim of the study was the elaboration of a mathematical model to describe the process of acoustic wave propagation, generated by an ultrasonic probe in a inhomogenous loosing medium. Numerical calculations make it possible to define waveforms for electric signals that are generated when ultrasonic waves, being reflected and backscattered by an artery model, are then received by the ultrasonic probe. It is the signal that pretty well corresponds with the actual RF signal that is obtained during measurements at the output of the ultrasonic apparatus. The developed solver of acoustic field was used for simulation of the artery wall thickness examination. The theoretical model of the artery for the creating the simulated ultrasonic reflected echoes was used. The internal radius of the artery model was 3 mm for the diastolic pressure and 3.3 mm for the systolic pressure. The intima-media thickness (IMT) of the artery wall was changed from 0.48 mm to 0,44 mm respectively. The solver based on zero-crossing method was used for detecting changes of the IMT.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2007
• Tom: Vol. 10
• Strony: 163--168
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Powałowski T.

autor

Wójcik J.

autor

Trawiński Z.

• Ultrasonic Department, Institute of Fundamental Technological Research, Polish Academy of Science,

Bibliografia

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• [2] T. Powałowski, Z. Trawiński, L. Hilgertner, Common carotid wall elasticity and intima-media thickness examinations by means of ultrasound, Archives of Acoustics 25, 205–212, 2000
• [3] T. Powałowski, Z. Trawiński, L. Hilgertner, Ultrasonic examination of common carotid artery wall elasticity of persons with different stages of internal carotid artery atherosclerosis, Archives of Acoustics 28, 325–337, 2003
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• [5] Z. Trawiński, T. Powałowski, Modeling and ultrasonic examination of common carotid artery wall thickness changes, Archives of Acoustics, 31 (Supplement), 29-34, 2006
• [6] J. Wójcik, Conservation of energy and absorption in acoustic fields for linear and nonlinear propagation, Acoust. Soc. Am. 104, 2654–2663, 1998
• [7] J. Wójcik, Nonlinear reflection and transmission of plane acoustics waves, Archives of Acoustics 29, 607–632, 2004
• [8] J. Wójcik, A. Nowicki, P.A. Lewin, P.E. Bloomfield, T. Kujawska, L. Filipczynski†, Wave Envelopes Method for Description of Nonlinear Acoustic Wave Propagation, Ultrasonics 44, 310–329, 2006
• [9] J. Wójcik, T. Powałowski, R. Tymkiewicz, A. Lamers, Z. Trawiński, Scattering of ultrasonic wave on a model of the artery, Archives of Acoustics, 31, 471-479, 2006