[논문]주파수 출력 제어 최적화를 통한 고강도 집속 초음파 피부치료 시스템 개발 연구

박종철; 김민성

doi:10.9717/kmms.2022.25.8.1022

[국내논문] 주파수 출력 제어 최적화를 통한 고강도 집속 초음파 피부치료 시스템 개발 연구
A Study on the Development of High-Intensity Focused Ultrasound Skin Treatment System Through Frequency Output Control Optimization 원문보기

멀티미디어학회논문지 = Journal of Korea Multimedia Society, v.25 no.8, 2022년, pp.1022 - 1037

박종철 (Department of Electrical, Electronics & Information Communications Engineering, Graduate School, Tong Myong University) , 김민성 (School of Artificial Intelligence, College of Artificial Intelligence Convergence, TongMyong University)

Abstract ▼ AI-Helper

It is important to develop a transducer that generates uniform output power through frequency control of the HIFU at 4 MHz frequency for the high intensity focused ultrasound (HIFU) skin diseases treatment. In this paper, a 4 MHz frequency band HIFU system for skin disease treatment was designed, manufactured and developed. In HIFU, even for the ultrasonic vibrator in the 4 MHz frequency band, the characteristics of the output power of the HIFU are different depending on the difference in the thickness of the PZT material. Through the development of a system amplifier, the sound output of the HIFU transducer was improved to more than 48 W and uniform output power control was possible. And, it is possible to control the output power even in a frequency band of 4.0 to 4.7 MHz, which is wider than 4.0 MHz, and shows the resonance frequency of the transducer. The maximum output power for each frequency was 49.969 W and the minimum value was 48.018 W. The maximum output power compared to the minimum output power is 49.969 W, which is uniform within 4.1%. It was confirmed that the output power of the HIFU through the amplifier can be uniformly controlled in the 4 MHz frequency band.

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표/그림 (30)

그림 Fig. 1. Skin reach depth principle of HIFU device.
그림 Fig. 2. HIFU-based skin care system block diagram.
그림 Fig. 3. Handpiece apparatus 3D design.
그림 Fig. 4. Pulse generator circuit schematic.
그림 Fig. 5. Amplifier circuit diagram.
그림 Fig. 6. (a) Amplifier Board Picture and (b) Amplifier board PCB artwork.
그림 Fig. 7. Main Controller Board Design.
그림 Fig. 8. Handpiece board design.
그림 Fig. 9. Handpiece board and Cartridge board.
그림 Fig. 10. Catridge board design.
그림 Fig. 11. HIFU therapy device operation algorithm.
그림 Fig. 12. A photo of the handpiece prototype.
표 Table 1. Transducer measurement data of (a) 4.0 MHz and (b) 4.1 MHz.
그림 Fig. 13. Transducer impedance matching design with 4.0 MHz frequency.
그림 Fig. 14. Transducer impedance matching result at 4.0 MHz frequency.
그림 Fig. 15. 4.0 MHz Impedance circuit design.
그림 Fig. 16. Simulation results of low-pass filter. (a) Design of low-pass filters and (b) Impedance matching.
그림 Fig. 17. Photo of low pass filter board.
그림 Fig. 18. Experimental device configuration block diagram.
그림 Fig. 19. Photos of experimental setup configuration.
그림 Fig. 20. The result of measuring the output voltage in the 4.0~4.7 MHz frequency band.
그림 Fig. 21. The result of measuring the output power in the 4.0~4.7 MHz frequency band.
표 Table 2. Frequency measurement data are (a) 4.00 MHz, (b) 4.30 MHz, and (c) 4.70 MHz.
그림 Fig. 22. RFB experimental equipment.
그림 Fig. 23. Measurement result of ultrasonic intensity. (a) Ultrasound max power and (b) ultrasound intensity.
그림 Fig. 25. Focal length accuracy.
그림 Fig. 24. (a) Measurement system and (b) Focal length measurement result.
그림 Fig. 26. (a) Measurement system and (b) Result of frequency measurement.
그림 Fig. 27. Focus temperature measurement.
그림 Fig. 28. Focus temperature measurement result : (a) focus temperature and (b) focus ambiebt temperature.

참고문헌 (9)

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