Title :
A time-domain numerical model for simulating the acoustic field of a high-amplitude focused source in biological media
Author :
Tavakkoli, J. ; Sapozhnikov, O.A. ; Souchon, R. ; Cathignol, D.
Author_Institution :
Inst. of Biomed. Eng., Toronto Univ., Ont., Canada
Abstract :
A time-domain numerical model for simulating acoustic pulse focusing in biological media with a symmetrical source geometry is presented in this model, the main effects responsible in finite-amplitude, focused wave propagation in a dissipative and nonlinear medium are taken into account. These effects, i.e. absorption, nonlinearity and diffraction, are treated independently using the method of fractional steps with an operator-splitting algorithm. Using this model the acoustic pressure field generated by a focused shock-wave generator has been simulated and very good agreement in the shape of theoretical and experimental pressure-time waveforms was obtained
Keywords :
acoustic field; biomedical ultrasonics; nonlinear acoustics; physiological models; shock waves; ultrasonic absorption; ultrasonic focusing; ultrasonic propagation; acoustic field simulation; biological media; dissipative nonlinear medium; finite-amplitude focused wave propagation; focused shock-wave generator; fractional steps method; high-amplitude focused source; pressure-time waveforms; symmetrical source geometry; time-domain numerical model; Absorption; Acoustic diffraction; Acoustic propagation; Acoustic pulses; Biological system modeling; Geometry; Numerical models; Numerical simulation; Solid modeling; Time domain analysis;
Conference_Titel :
Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-4153-8
DOI :
10.1109/ULTSYM.1997.663347
