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Finite element simulation of HIFU nonlinear medical ultrasound field
Author(s): Chengcheng Guo; Lei Yao; Huifeng Zheng; Yuebing Wang; Shenping Gao; Xiaobo Wang; Delin Wu
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Paper 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.

Paper Details

Date Published: 13 November 2019
PDF: 7 pages
Proc. SPIE 11343, Ninth International Symposium on Precision Mechanical Measurements, 113431Y (13 November 2019); doi: 10.1117/12.2548855
Show Author Affiliations
Chengcheng Guo, China Jiliang Univ. (China)
Zhejiang Institute of Metrology (China)
Key Lab. of Acoustics and Vibration Precision Measuring Technology of Zhejiang Province (China)
Lei Yao, Zhejiang Institute of Metrology (China)
Key Lab. of Acoustics and Vibration Precision Measuring Technology of Zhejiang Province (China)
Huifeng Zheng, China Jiliang Univ. (China)
Yuebing Wang, China Jiliang Univ. (China)
Shenping Gao, Zhejiang Institute of Metrology (China)
Key Lab. of Acoustics and Vibration Precision Measuring Technology of Zhejiang Province (China)
Xiaobo Wang, Zhejiang Institute of Metrology (China)
Key Lab. of Acoustics and Vibration Precision Measuring Technology of Zhejiang Province (China)
Delin Wu, Zhejiang Institute of Metrology (China)
Key Lab. of Acoustics and Vibration Precision Measuring Technology of Zhejiang Province (China)


Published in SPIE Proceedings Vol. 11343:
Ninth International Symposium on Precision Mechanical Measurements
Liandong Yu, Editor(s)

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