Study of nonlinear acoustic field of high intensity focused ultrasound by the fractional wave | Zendy

Jianming Sun | Zendy; Jie Yu | Zendy; Guo Xia-Sheng | Zendy; Dong Zhang | Zendy

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Study of nonlinear acoustic field of high intensity focused ultrasound by the fractional wave

Author(s) -

Jianming Sun,

Jie Yu,

Guo Xia-Sheng,

Dong Zhang

Publication year - 2013

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.62.054301

Subject(s) - attenuation , acoustics , acoustic wave equation , dispersion (optics) , acoustic attenuation , sound intensity , physics , nonlinear system , wave equation , field (mathematics) , acoustic wave , computational physics , optics , sound (geography) , mathematics , quantum mechanics , pure mathematics

The acoustic energy distribution of high intensity focused ultrasound (HIFU) is influenced by the attenuation and the dispersion of the biological tissue. In this paper we modify the KZK equation according to the fractional wave equation, in order to accurately describe the sound field of HIFU. The theoretical and experimental studies of frequency dependences of attenuation and sound speed examine the validity of the fractional wave equation. Furthermore, the numerical simulation of HIFU field is performed using the modified KZK equation. The results demonstrate that the introduction of the fractional derivative equation could solve the problems of the attenuation and sound dispersion, leading to the accuracy improvement of HIFU therapy.

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