低场核磁共振短死时间射频线圈与射频开关的设计

doi:10.11938/cjmr20202823

波谱学杂志 ›› 2021, Vol. 38 ›› Issue (1): 1-11.doi: 10.11938/cjmr20202823

低场核磁共振短死时间射频线圈与射频开关的设计

冯涛^1,2, 陈俊飞¹, 张震^1,2, 杨春升^1,2, 张志¹, 刘朝阳¹

1. 中国科学院精密测量科学与技术创新研究院, 中国科学院武汉物理与数学研究所, 波谱与原子分子物理国家重点实验室, 武汉磁共振中心, 中国科学院生物磁共振分析重点实验室, 湖北武汉 430071;
2. 中国科学院大学, 北京 100049

收稿日期:2020-03-29 出版日期:2021-03-05 发布日期:2020-05-09
通讯作者: 刘朝阳 Tel: 02787199686, E-mail: chyliu@wipm.ac.cn. E-mail:chyliu@wipm.ac.cn
基金资助:
国家重大科研装备研制项目（81627901）；国家重点研发计划重点专项（2018YFC0115000）；国家自然科学基金青年科学基金资助项目（11705274）；中国科学院科研装备研制项目（YZ201551，YZ201677）.

A Design of Short Dead-Time RF Coil and RF Switch for Low-Field NMR

FENG Tao^1,2, CHEN Jun-fei¹, ZHANG Zhen^1,2, YANG Chun-sheng^1,2, ZHANG Zhi¹, LIU Chao-yang¹

1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, CAS Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2020-03-29 Online:2021-03-05 Published:2020-05-09

摘要/Abstract

摘要： 本文以核磁共振（NMR）射频线圈振铃信号产生原理为对象进行分析研究，提出了一种适用于低场环境下由环状间隙腔线圈与螺线管线圈构成的收发分离式短死时间射频线圈设计方案，采用优化调谐匹配网络提高发射效率；根据射频线圈方案需求设计了快速切换的射频开关及驱动．在此基础上依据仿真结果制作了短死时间射频线圈，并应用于自主研制的低场9.51 MHz便携式NMR谱仪系统，进行NMR实验，结果显示可将收发切换时间缩短至10 μs以内，验证了该设计方案的可行性．

关键词: 低场核磁共振(low-field NMR), 短死时间射频线圈, 振铃信号, 环状间隙腔(LGR)线圈, 射频开关及驱动, 失谐

Abstract: Based on the ring-down signal generation principle of nuclear magnetic resonance (NMR), we presented here a design scheme of transmitting and receiving separated short dead-time radio frequency (RF) coil composed of loop-gap resonator (LGR) coil and solenoid coil in low-field NMR system, to improve transmission efficiency by optimizing tuning and matching network. We also designed a fast RF switch and driver to fulfill the requirement of the RF coil. Based on the simulation results, the short dead-time RF coil was fabricated and applied to a self-developed 9.51 MHz portable low-field NMR spectrometer. The NMR experiments showed that the dead-time was reduced to less than 10 μs, which verified the feasibility of the design scheme.

Key words: low-field nuclear magnetic resonance, short dead-time radio frequency coil, ring-down signal, loop-gap resonator coil, radio frequency switch and driver, detuned

中图分类号:

O482.53

冯涛, 陈俊飞, 张震, 杨春升, 张志, 刘朝阳. 低场核磁共振短死时间射频线圈与射频开关的设计[J]. 波谱学杂志, 2021, 38(1): 1-11.

FENG Tao, CHEN Jun-fei, ZHANG Zhen, YANG Chun-sheng, ZHANG Zhi, LIU Chao-yang. A Design of Short Dead-Time RF Coil and RF Switch for Low-Field NMR[J]. Chinese Journal of Magnetic Resonance, 2021, 38(1): 1-11.

参考文献

[1] LIU Z Z, YANG D, SHAO J X, et al. Evolution of pore connectivity in the Fushun oil shale by low-field nuclear magnetic resonance spectroscopy[J]. Chinese J Magn Reson, 2019, 36(3):309-318.刘志军,杨栋,邵继喜,等.基于低场核磁共振的抚顺油页岩孔隙连通性演化研究[J].波谱学杂志, 2019, 36(3):309-318.
[2] CHEN H Y, ZHAO S L, LI X N, et al. B₁ mapping on low-field permanent magnet MRI scanner[J]. Chinese J Magn Reson, 2018, 35(4):498-504.陈海燕,赵世龙,李晓南,等.低场永磁体磁共振射频场映像[J].波谱学杂志, 2018, 35(4):498-504.
[3] HONG S X, HU H B, YANG Z T, et al. Effects of tissue coagulative necrosis on longitudinal relaxation time-based magnetic resonance thermometry[J]. Chinese J Magn Reson, 2018, 35(4):440-446.洪声秀,胡红兵,杨增涛,等.组织凝固性坏死对基于纵向弛豫时间的磁共振测温的影响[J].波谱学杂志, 2018, 35(4):440-446.
[4] MITCHELL J, FORDHAM E J. Contributed review:nuclear magnetic resonance core analysis at 0.3 T[J]. Rev Sci Instrum, 2014, 85(11):111502.
[5] BORGIA G C, BROWN R J S, FANTAZZINI P. Different "average" nuclear magnetic resonance relaxation times for correlation with fluid-flow permeability and irreducible water saturation in water-saturated sandstones[J]. J Appl Phys, 1997, 82(9):4197-4204.
[6] WASHBURN K E. Relaxation mechanisms and shales[J]. Concepts Magn Reson A, 2014, 43(3):57-78.
[7] WASHBURN K E, BIRDWELL J E. Updated methodology for nuclear magnetic resonance characterization of shales[J]. J Magn Reson, 2013, 233(Complete):17-28.
[8] YANG Y, SUN Y B, HE X H, et al. The design of a probe used in nuclear quadrupole resonance detection system[J]. Chinese J Magn Reson, 2013, 30(1):113-120.阳燕,孙宜斌,何学辉,等.一种核四极共振探测系统中天线探头的设计方法[J].波谱学杂志, 2013, 30(1):113-120.
[9] DOGANAY O, THIND K, WADE T, et al. Transmit-only/receive-only radiofrequency coil configuration for hyperpolarized ¹²⁹Xe MRI of rat lungs[J]. Concepts Magn Reson B, 2015, 45(3):115-124.
[10] GOR'KOV P L, CHEKMENEV E Y, LI C, et al. Using low-E resonators to reduce RF heating in biological samples for static solid-state NMR up to 900 MHz[J]. J Magn Reson, 2007, 185(1):77-93.
[11] GOR'KOV P L, WITTER R, CHEKMENEV E Y, et al. Low-E probe for ¹⁹F-¹H NMR of dilute biological solids[J]. J Magn Reson, 2007, 189(2):182-189.
[12] GAN Z H, GOR'KOV P L, BREY W W, et al. Enhancing MQMAS of low-γ nuclei by using a high B₁ field balanced probe circuit[J]. J Magn Reson, 2009, 200(1):2-5.
[13] PAULSON E K, MARTIN R W, ZILM K W. Cross polarization, radio frequency field homogeneity, and circuit balancing in high field solid state NMR probes[J]. J Magn Reson, 2004, 171(2):314-323.
[14] MCNEILL S A, GOR'KOV P L, SHETTY K, et al. A low-E magic angle spinning probe for biological solid state NMR at 750 MHz[J]. J Magn Reson, 2009, 197(2):135-144.
[15] 谯劼.大功率高隔离PIN二极管收发开关电路设计与软件仿真研究[D].成都:电子科技大学, 2012.
[16] DIAO Y J, XIE J Y, XU J C, et al. A high-speed driver for NMR T/R switch[J]. Chinese J Magn Reson, 2016, 33(1):37-43.刁玉剑,谢君尧,徐俊成,等.磁共振快速T/R开关驱动器研制[J].波谱学杂志, 2016, 33(1):37-43.

低场核磁共振短死时间射频线圈与射频开关的设计

A Design of Short Dead-Time RF Coil and RF Switch for Low-Field NMR

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