Reliability and utility of a Dry Test Bench for testing the acoustic output from a ballistic shock wave therapeutic device

Sung Joung Jeon; Min Young Lee; Oh Bin Kwon; Jong Min Kim; Min Joo Choi

doi:10.7776/ASK.2022.41.5.589

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2022 Vol.41, Issue 5 Preview Page

Research Article

Reliability and utility of a Dry Test Bench for testing the acoustic output from a ballistic shock wave therapeutic device 탄도형 충격파 치료기의 음향 출력 시험을 위한 Dry Test Bench의 신뢰성 및 유용성

30 September 2022. pp. 589-600

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Abstract

In order to verify the reliability of Dry Test Bench (DTB) used for testing the output energy from ballistic extracorporeal shock wave therapeutic devices, the measurements with DTB were compared with the acoustic energy measured with a Laser Doppler Vibrometer (LDV) for a commercial ballistic ESWT device. It was shown that the mechanical energy detected with DTB had variability maintained within 5 % at the same output power setting and also had a linear correlation (adj. R² = 0.991) with the acoustic energy measured with the LDV for the entire output power settings. Using the correlation between the two methods and the correlation on the acoustic energy measured in between air and water with the LDV, the DTB measurement can be used to estimate the energy flux density in water with an average error of 7.85 % for the entire output power settings of the ballistic shock wave generator considered in the experiment. DTB provides information limited to the output mechanical energy and therefore it is not suitable for testing the various acoustic output parameters required in IEC61846 and IEC63045. However, DTB that is simple in measurement principles and easy to use is expected for manufacturers and clinical users to monitor the performance of ballistic Extracorporeal Shock Wave Therapy (ESWT) devices.

Keywords

Extracorporeal shock wave therapy

Ballistic

Dry test bench

Laser Doppler Vibrometer (LDV)

Energy flux density

탄도형 체외 충격파 치료기의 출력 에너지를 측정하는 Dry Test Bench(DTB)의 신뢰성을 검증하기 위해, 상용 탄도형 충격파 치료기에 대해 Laser Doppler Vibrometer(LDV)로 측정된 충격파의 음향 에너지와 비교했다. 실험 결과, DTB로 측정된 역학적 에너지는, 동일한 출력 설정에서, 5 % 이내의 변동성을 보이며, 치료기의 전 출력 설정 범위에서 LDV로 측정된 충격파의 음향 에너지와 선형적인 상관성(adj. R² = 0.991)을 확인했다. 두 측정 방법의 상관성과, LDV을 이용하여 공기 및 수중에서 측정된 충격파 음향 에너지의 상관성(adj. R² = 0.995)을 통합하면, DTB 측정으로부터 수중에서 발생된 충격파의 energy flux density를 평균 7.85 % 오차로 추정된다. DTB는 치료기의 출력에너지에 대한 정보만 제공하기 때문에, IEC61846 및 IEC63045에서 요구하는 다양한 충격파의 음향 출력을 시험하는 도구로 적합하지 않다. 그러나 측정 원리가 단순하고 사용이 용이한 DTB는 제조사 및 사용자가 탄도형 Extracorporeal Shock Wave Therapy(ESWT) 치료기의 성능을 관리하는 목적으로 유용하게 사용될 수 있을 것으로 기대된다.

키워드

체외 충격파 치료술

탄도형

드라이 테스트 벤치

레이저 도플러 진동계

에너지 속 밀도

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 41
No :5
Pages :589-600
Received Date : 2022-07-26
Accepted Date : 2022-09-15
DOI :https://doi.org/10.7776/ASK.2022.41.5.589

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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