Numerical model for describing three-dimensional acoustic fields in inhomogeneous media using the wide-angle parabolic approximation

Авторы: Konnova E.O., Karzova M.M., Khokhlova V.A., Yuldashev P.V.
Журнал: Acoustical Physics
Том: 71
Номер: 6
Год издания: 2025
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 824
Последняя страница: 839
DOI: 10.1134/S1063771024603169
Аннотация: A numerical method is presented for simulating the acoustic field in a smoothly inhomogeneous medium, based on the use of a three-dimensional wide-angle parabolic model and expansion of a modified propagator of the one-way wave equation into operator Fourier series. The problem of focusing an ultrasound beam generated by a transducer with parameters characteristic of noninvasive ultrasound surgery devices is considered in a medium with smooth inhomogeneity, simulating the inhomogeneities of soft biological tissues. An optimization search for the best values of the free parameters of the modified propagator has been conducted to achieve the smallest approximation error of the propagator using a Fourier series with a finite number of harmonics. The simulation results obtained using the developed method and the reference full-wave pseudospectral numerical “k-Wave” model are compared.
Добавил в систему: Коннова Елена Олеговна

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