Acoustical Physics

, Volume 57, Issue 3, pp 334–343 | Cite as

Simulation of three-dimensional nonlinear fields of ultrasound therapeutic arrays

Nonlinear Acoustics

Abstract

A novel numerical model was developed to simulate three-dimensional nonlinear fields generated by high intensity focused ultrasound (HIFU) arrays. The model is based on the solution to the Westervelt equation; the developed algorithm makes it possible to model nonlinear pressure fields of periodic waves in the presence of shock fronts localized near the focus. The role of nonlinear effects in a focused beam of a two-dimensional array was investigated in a numerical experiment in water. The array consisting of 256 elements and intensity range on the array elements of up to 10 W/cm2 was considered. The results of simulations have shown that for characteristic intensity outputs of modern HIFU arrays, nonlinear effects play an important role and shock fronts develop in the pressure waveforms at the focus.

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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  1. 1.Moscow State UniversityMoscowRussia
  2. 2.Center for Industrial and Medical Ultrasound, Applied Physics LaboratoryUniversity of WashingtonSeattleUSA

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