基于变宽铜带螺线管线圈的低场核磁共振探头的研制  

The development of low-field NMR probe based on solenoid coil with variable width

作　　者：袁毅 陆荣生[1,2] 倪中华 Yuan Yi;Lu Rongsheng;Ni Zhonghua(School of Mechanical Engineering, Southeast University, Jiangsu Nanjing, 211189, China;Jiangsu Key Laboratory for Design and Manufacture of Micro-NanoBiomedical Instruments, Southeast University,Jiangsu Nanjing, 211189,China)

机构地区：[1]东南大学机械工程学院,江苏南京211189 [2]江苏省微纳生物医疗器械设计与制造重点实验室,江苏南京211189

出　　处：《机械设计与制造工程》2022年第6期14-18,共5页Machine Design and Manufacturing Engineering

摘　　要：针对低场核磁共振短弛豫微弱信号的检测需求,开发了一种基于变宽铜带螺线管线圈的低场核磁共振探头。与常规低场核磁共振探头相比,设计的螺线管线圈能够以较低的匝数实现良好的射频磁场均匀性,设计的调谐匹配电路能够有效降低探头死时间。结合实验室前期研制的低场核磁共振检测平台,对研制的探头进行基本参数测试。测试结果表明,研制的低场核磁共振探头具有低死时间、高信噪比和良好的射频磁场均匀度,能够有效采集短弛豫核磁共振信号。A low-field NMR probe based on solenoid coil made by copper tape with variable width is proposed for the detection of weak short-relaxation signals.Compared with the conventional low-field NMR probe,the designed solenoid coil can achieve good RF magnetic field uniformity with a lower number of turns,and the designed tuning matching circuit can effectively reduce the probe dead time.Combined with the low-field NMR detection platform developed in the laboratory,the basic parameters of the developed probe are tested.The results show that the developed low-field NMR probe has short dead time,high signal-to-noise ratio and good RF magnetic field uniformity,and can effectively acquire short-relaxation NMR signals.

关 键 词：低场核磁共振 探头 螺线管线圈 调谐匹配 

分 类 号：TH12[机械工程—机械设计及理论]