Abstract:
In the process of ultrasound application, it is very important to clarify the ultrasound field, temperature field and stress field distribution in biological tissues. Based on the acoustic mode theory of pipes, the Pennes biological heat conduction equation and elastic wave equation, the finite element method is used to simulate the ultrasound field, temperature field and stress field of the acupoints in the ear generated by the transducer with hyperbolic pipe.The transducer with hyperbolic pipe is compared with the concave spherical transducer. The results show that the ultrasound field of the acupoints in the ear induced by the transducer with hyperbolic pipe is a slender spindle-shaped area.The ultrasound intensity, temperature rise and stress of the acupoints in the ear increase with the increase of the emitted acoustic pressure of the transducer. In addition, the ultrasound intensity distribution of the acupoints in the ear induced by the transducer with hyperbolic pipe is relatively flat. Moreover, when the ultrasound irradiation time is more than 10.52 s, it causes higher temperature rise at the skin-cartilage interface and smaller stress in the ear.
