用PVDF压电传感器对高强度聚焦超声声功率实时监测的实验研究  

An Experimental Study of Real-time Monitoring of Acoustic Output in High-intensity Focused Ultrasound Using PVDF Piezoelectric Sensor

作　　者：黄曦[1] 林涛[1] 付英述[2] 齐家俊[2] 许贵华[2] 叶方伟[1] 

机构地区：[1]重庆医科大学生物医学工程系,重庆市生物医学工程学重点实验室,重庆市超声医学工程重点实验室-省部共建国家重点实验室培育基地,重庆400016 [2]超声医疗国家工程研究中心,重庆401120

出　　处：《世界科技研究与发展》2009年第1期159-161,共3页World Sci-Tech R&D

基　　金：重庆市科委攻关项目(渝科发计字[2007]11号);国家发展和改革委员会(发改高技[2005]2181号)

摘　　要：本实验研究旨在探索一种实时监测高强度聚焦超声(HIFU)声功率的方法用PVDF压电膜制成传感器,安装在HIFU换能器声场中某一固定位置。换能器工作过程中用示波器检测PVDF压电传感器的电压输出信号。结果显示示波器可稳定检测出PVDF压电传感器的输出电压,该电压正比于换能器的驱动电压。这表明换能器的声功率输出与PVDF压电传感器的电压输出呈正相关关系,证明PVDF压电传感器可用于实时监测HIFU治疗过程中换能器的声功率输出,从而保证HIFU治疗的安全性和有效性。The purpose of this study is to explore a technique to monitor the acoustic output in real-time of a transducer used in high-intensity focused ultrasound(HIFU) treatment.A PVDF piezoelectric sensor was made and located at a specific position in acoustic field of a HIFU transducer.During operation of the transducer,an oscillograph was used to detect the voltage output signal of the piezoelectric sensor.Results showed that the oscillograph stably detected the voltage output of the sensor,which was relevant to the driving voltage of the transducer.That meant there was a correlation between the output voltage of the sensor and the acoustic power output from the transducer.It implies that the PVDF piezoelectric sensor can be used to monitor the real - time acoustic output of the transducer and to assure safety of HIFU treatment.

关 键 词：高强度聚焦超声 压电传感器 换能器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]