Calculation of Temperature Rise in Multi-layer Biological Tissue Based on Large Aperture Concave Sphere Focused Ultrasonic Transducer

Document Type : Original Paper

Authors

1 School of Information Science and Engineering, Changsha Normal University, Changsha 410100, China

2 School of Physics and Electronics, Central South University, Changsha 410083, China

3 School of Information Science and Engineering, Changsha Normal University

Abstract

Introduction

The large aperture concave spherical focused ultrasonic transducer has stronger acoustic focusing effect and can obtain good temperature rise effect. The purpose of this study was to explore the effect of different frequency, duty cycle and inner radius parameters on temperature rise of multi-layer biological tissue.

Materials and Methods

The simulation model of high-intensity focused ultrasound (HIFU) irradiated multi-layer biological tissue was constructed. By changing the irradiation frequency, duty cycle and inner radius of large aperture concave spherical focused ultrasonic transducer, the sound field and temperature field of multi-layer biological tissue were simulated and calculated by using Westervelt nonlinear acoustic wave equation and Pennes biological heat conduction equation, respectively.

Results

The intensity of sound field increased with the increase of frequency, while it decreased with the increase of inner radius, but the duty cycle almost had no effect on the intensity of sound field. The focal temperature increased with the increase of frequency and duty cycle, but decreased with the increase of inner radius.

Conclusion

By selecting appropriate parameters of transducer, the optimum temperature rise in the target area of biological tissue can be obtained by using a large aperture concave spherical focused ultrasonic transducer.

Keywords

Main Subjects



Articles in Press, Accepted Manuscript
Available Online from 21 June 2022
  • Receive Date: 13 March 2022
  • Revise Date: 09 June 2022
  • Accept Date: 21 June 2022
  • First Publish Date: 21 June 2022