面向超高场核磁共振应用的微型接收线圈制作与实验研究

为实现纳升级微量样品检测,结合商业常规核磁共振3.2毫米探头,本文研究了两种类型的自谐振微型接收线圈。当无线传输能量时,探头螺旋管形成射频脉冲激励能量。而微型接收线圈对该能量进行接收后以样品为作用目标,并采集信号回传,把感应获取的磁共振信号传输到探头螺线管。与现有磁共振探头不同,本文提出Pigtail型和Stripline型微接收线圈结构。实测结果显示,线圈谐振频率达128MHz和935.7MHz,应用于3T超导核磁共振设备初步完成了蔗糖波谱的测试分析实验,表明微型接收线圈对提高谱线分辨率有重要作用。

Fabrication and Experiment Research of Micro Receiving Coil for High Field Nuclear Magnetic Resonance Application

For the detection of nano-liter sample,two types of self-resonance micro receiving coils are studied with commercial Nuclear Magnetic Resonance probe of 3.2 mm.During the wirelessly energy transfer,the solenoid coil of the probe generates radio frequency energy of pulse excitation.When the micro receiving coil gets the incident energy and puts onto the sample of target,an induced signal is generated immediately and backs to the micro receiving coil.Then micro receiving coil would transfer the induced magnetic resonance signal back to the solenoid of the probe finally.Different from the design of current Nuclear Magnetic Resonance probe,two types of micro receiving coil structures(Pigtail and Stripline)are proposed,respectively.The measurement results showed that the resonance frequencies are 128 MHz and 935.7 MHz.The achieved micro receive coil was applied to a 3.0T Nuclear Magnetic Resonance system.The spectrum of sucrose was detected and analyzed,it showed that the micro receive coil has important role in increasing the resolution of line.