An enhanced numerical model to simulate nonlinear continuous wave ultrasound field

Authors

  • Shahram Mashouf Dept. of Physics, Ryerson University, ON M5B 2K3, Canada
  • Jahan Tavakkoli Dept. of Physics, Ryerson University, ON M5B 2K3, Canada

Keywords:

Acoustic fields, Acoustic waves, Numerical methods, Ultrasonic testing, Ultrasonics, Continuous wave ultrasound, Diffraction solutions, High intensity focused ultrasound, Non-Linearity, Numerical models, Power deposition, Pressure calculation, Second-order operators, Source geometry, Splitting method, Temperature prediction, Temperature rise

Abstract

A study was conducted to develop an enhanced numerical model to simulate nonlinear continuous wave ultrasound field. The model was based on a second-order operator splitting method where the acoustic field was propagated over incremental steps. The splitting method accounted the effects of diffraction, nonlinearity, and attenuation to help in developing the model. The model was a modified version of the KZK model where the parabolic diffraction term was replaced by a more accurate full diffraction term. The method was enhanced by introducing arbitrary source geometry and excitation definition, full diffraction solution, enhanced pressure calculation, and enhanced power deposition rate and temperature prediction capabilities. This resulted in a useful tool for simulating high intensity focused ultrasound (HIFU) beams in tissue, including temperature rise predictions.

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Published

2009-09-01

How to Cite

1.
Mashouf S, Tavakkoli J. An enhanced numerical model to simulate nonlinear continuous wave ultrasound field. Canadian Acoustics [Internet]. 2009 Sep. 1 [cited 2021 Oct. 19];37(3):172-3. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2189

Issue

Section

Proceedings of the Acoustics Week in Canada

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