Measurement and numerical simulation of high intensity focused ultrasound field in water

In the present study, the acoustic field of a high intensity focused ultrasound (HIFU) transducer in water was measured by using a commercially available needle hydrophone intended for HIFU use. To validate the results of hydrophone measurements, numerical simulations of HIFU fields were performed b...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2017, 71(10), , pp.665-669
Main Author: Lee, Kang Il
Format: Article
Language:English
Subjects:
Computer simulation
Mathematical and Computational Physics
Mathematical models
Particle and Nuclear Physics
Physics
Physics and Astronomy
Simulation
Theoretical
Transducers
Ultrasonic imaging
Waveforms
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Summary:In the present study, the acoustic field of a high intensity focused ultrasound (HIFU) transducer in water was measured by using a commercially available needle hydrophone intended for HIFU use. To validate the results of hydrophone measurements, numerical simulations of HIFU fields were performed by integrating the axisymmetric Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation from the frequency-domain perspective with the help of a MATLAB-based software package developed for HIFU simulation. Quantitative values for the focal waveforms, the peak pressures, and the size of the focal spot were obtained in various regimes of linear, quasilinear, and nonlinear propagation up to the source pressure levels when the shock front was formed in the waveform. The numerical results with the HIFU simulator solving the KZK equation were compared with the experimental data and found to be in good agreement. This confirms that the numerical simulation based on the KZK equation is capable of capturing the nonlinear pressure field of therapeutic HIFU transducers well enough to make it suitable for HIFU treatment planning.
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.71.665