Measurement of the Instantaneous Acoustic Power of Diagnostic Ultrasound Equipment by Piezoelectric-Array Acoustic Power Meter

作者全名："Chen, Yinyin; Hu, Shuang; Zheng, Weicheng; Wang, Shenggeng; Li, Chen; Zhou, Yufeng; Yang, Zengtao"

作者地址："[Chen, Yinyin; Hu, Shuang; Zheng, Weicheng; Wang, Shenggeng; Li, Chen; Zhou, Yufeng; Yang, Zengtao] Chongqing Med Univ, Coll Biomed Engn, State Key Lab Ultrasound Med & Engn, Chongqing 400016, Peoples R China; [Chen, Yinyin; Hu, Shuang; Zheng, Weicheng; Wang, Shenggeng; Li, Chen; Zhou, Yufeng; Yang, Zengtao] Chongqing Med Univ, Coll Biomed Engn, Chongqing Key Lab Biomed Engn, Chongqing 400016, Peoples R China"

通信作者："Yang, ZT (通讯作者)，Chongqing Med Univ, Coll Biomed Engn, State Key Lab Ultrasound Med & Engn, Chongqing 400016, Peoples R China."

来源：IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT

ESI学科分类：ENGINEERING

WOS号：WOS:001040185000017

JCR分区：Q1

影响因子：5.6

年份：2023

卷号：72

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：1-3 piezoelectric composite; acoustic power meter; instantaneous acoustic output power; piezoelectric array; radiation force balance (RFB)

摘要："The bounded-square (1 x 1 cm) instantaneous acoustic power for most ultrasound imaging devices can reach several hundred or even thousand watts, which has a strong possibility of causing inertial cavitation, chromosome damage, fetus stimulation, or other biological impacts. Hence, the instantaneous acoustic power should be accurately measured. Up until now, the radiation force balance (RFB) is the only commercially available instrumentation for measuring acoustic power. However, the RFB, which measures the acoustic power based on a spatiotemporal averaging approach, cannot acquire the instantaneous acoustic output power directly. To measure the instantaneous acoustic output power, a new instrumentation named piezoelectric-array acoustic power meter based on piezoelectric effect is proposed. To analyze the operating mechanism of the piezoelectric-array acoustic power meter, a dynamic model of acoustic-structure interaction is established. The relationship between instantaneous acoustic power and the output voltage on piezoelectric arrays is derived. To verify the theory, a sample of piezoelectric acoustic power meter with nine arrays is fabricated using 1-3 piezoelectric composites. Experimental results show that the error between the proposed method and RFB is less than 10% below 20 W, proving the accuracy of our proposed instrumentation. The maximum bounded-square (1 x 1 cm) instantaneous acoustic output power of a B-mode ultrasonic diagnostic device we obtained reaches 46.41 +/- 0.30 W, approximately two times higher than the estimated value obtained from RFB. Moreover, it is interesting to note that the maximum acoustic output power of an ultrasonic source operating in continuous mode in the experiments reaches 42.07 +/- 0.20 W, which is about two times higher than the IEC standard. The proposed method overcomes the limitation of the RFB method, which can only obtain the spatiotemporal averaged acoustic output power. It provides a new instrumentation to measure both the instantaneous acoustic output power and the high acoustic output power as well"

基金机构：Program for Youth Innovation in Future Medicine of Chongqing Medical University [W0015]; Chongqing Postgraduate Mentor Team [cqmudstd202222]

基金资助正文："This work was supported in part by the Program for Youth Innovation in Future Medicine of Chongqing Medical University under Grant W0015, and in part by the Chongqing Postgraduate Mentor Team under Grant cqmudstd202222.& nbsp;"