核磁共振用PMT-PN智能换能器的研制  

Development of PMT-PN Intelligent Transducers for Nuclear Magnetic Resonance

作　　者：张腾[1] 唐文君[1] 郭惟[1] ZHANG Teng;TANG Wen-jun;GUO Wei(Beijing Jishuitan Hospital Affiliated to Capital Medical University,Beijing 100035 China)

机构地区：[1]首都医科大学附属北京积水潭医院,北京100035

出　　处：《自动化技术与应用》2025年第2期30-33,43,共5页Techniques of Automation and Applications

基　　金：北京市属医院科研培育项目(PX2020018)。

摘　　要：目前对核磁共振的基本组成部分超声经皮能量传输换能器的研究十分重视,但是核磁共振设备寿命短、体积大,自主维修困难。为解决以上问题,研究分析了超声经皮能量传输系统的组织介质与功率传输,提出一种频率补偿的维修方案,设计和制备一种以固溶体弛豫铁电单晶铌镁酸铅-钛酸铅复合材料的超声换能器。设计实验对此进行性能验证,实验表明,发射换能器与接收换能器之间频率匹配度在8%以内,功率放大器效率最大在90%以上。系统效率大部分时间都稳定在了0.2的高效率上,整体效率保持在0.15以上。可见研究设计的超声换能器具有良好的性能。At present,great attention is paid to the research of ultrasound transdermal energy transfer transducers,which are the basic compo-nents of nuclear magnetic resonance.However,nuclear magnetic resonance equipment has short lifespan,large volume,and is dif-ficult to maintain independently.To address the above issues,this article investigates the tissue medium and power transmission of ultrasonic transdermal energy transmission systems,proposes a frequency compensated maintenance scheme,and designs and prepares an ultrasonic transducer using solid solution relaxation ferroelectric single crystal lead niobate titanate composite materi-al.It designs experiments to verify the performance of this.The experiments show that the frequency matching between the trans-mitting and receiving transducers is within 8%,and the maximum efficiency of the power amplifier is above 90%.The system ef-ficiency has remained stable at a high efficiency of 0.2 for most of the time,while the overall efficiency remains above 0.15.It can be seen that the ultrasonic transducer designed in this article has good performance.

关 键 词：核磁共振 UTET 换能器 复合材料 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]