Finite element simulation of HIFU nonlinear medical ultrasound field

Chengcheng Guo; Lei Yao; Huifeng Zheng; Yuebing Wang; Shenping Gao; Xiaobo Wang; Delin Wu

doi:10.1117/12.2548855

13 November 2019 Finite element simulation of HIFU nonlinear medical ultrasound field

Chengcheng Guo, Lei Yao, Huifeng Zheng, Yuebing Wang, Shenping Gao, Xiaobo Wang, Delin Wu

Proceedings Volume 11343, Ninth International Symposium on Precision Mechanical Measurements; 113431Y (2019) https://doi.org/10.1117/12.2548855
Event: International Symposium on Precision Mechanical Measurements 2019, 2019, Chongqing, China

Abstract

The high-intensity focused ultrasound (HIFU) in the clinical trials is prone to nonlinear effects, especially near the acoustic focal region, which has a great impact on the therapy effect of HIFU thermal ablation. In this paper, the Westervelt equation was introduced in theory.The HIFU transducer model was established to simulate the nonlinear ultrasonic propagation by the finite element simulation (FEM).The distortion waveform near the acoustic focal region are extracted separately, the spectrum analysis is performed and the distortion waveform is filtered. The simulations show that the nonlinear effect is most obvious in the focal area and the higher harmonics energy at the focus is very large, so the harmonics energy can’t be ignored. The study of the nonlinear effects of HIFU ultrasound field contributes to the accurate measurement of HIFU and lays a foundation for clinical trials of the HIFU systems.

Citation Download Citation

Chengcheng Guo, Lei Yao, Huifeng Zheng, Yuebing Wang, Shenping Gao, Xiaobo Wang, and Delin Wu "Finite element simulation of HIFU nonlinear medical ultrasound field", Proc. SPIE 11343, Ninth International Symposium on Precision Mechanical Measurements, 113431Y (13 November 2019); https://doi.org/10.1117/12.2548855

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