一种用于低场磁共振波谱仪的圆极化线圈设计

doi:10.11938/cjmr20253150

波谱学杂志 ›› 2025, Vol. 42 ›› Issue (3): 308-320.doi: 10.11938/cjmr20253150cstr: 32225.14.cjmr20253150

• 磁共振仪器与技术专栏 • 上一篇下一篇

一种用于低场磁共振波谱仪的圆极化线圈设计

汤世豪¹^,², 杨谨毓¹^,², 徐雅洁^#(), 王亚², 彭博文¹^,², 高宇昊¹^,², 杨晓冬²^,^*()

1.中国科学技术大学生物医学工程学院(苏州)，生命科学与医学部，江苏苏州 215163
2.中国科学院苏州生物医学工程技术研究所，江苏苏州 215163

收稿日期:2025-03-17 出版日期:2025-09-05 在线发表日期:2025-04-07
通讯作者: # Tel: 15250434900, E-mail: xuyj@sibet.ac.cn;
* Tel: 18900616030, E-mail: xiaodong.yang@sibet.ac.cn.
基金资助:
国家自然科学基金面上项目(12375293);苏州市社发项目(2023ss23)

A Design of Circularly Polarized Coil for Low-field Nuclear Magnetic Resonance Spectrometers

TANG Shihao¹^,², YANG Jinyu¹^,², XU Yajie^#(), WANG Ya², PENG Bowen¹^,², GAO Yuhao¹^,², YANG Xiaodong²^,^*()

1. School of Biomedical Engineering (Suzhou), Division of Life Sciences and Medicine, University of Science and Technology of China, Suzhou 215163, China
2. Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China

Received:2025-03-17 Published:2025-09-05 Online:2025-04-07
Contact: # Tel: 15250434900, E-mail: xuyj@sibet.ac.cn;
* Tel: 18900616030, E-mail: xiaodong.yang@sibet.ac.cn.

摘要/Abstract

摘要：

信噪比（SNR）是影响桌面磁共振波谱仪信号质量的一个关键参数，在探头中使用正交圆极化线圈是提升信噪比的有效手段，由于桌面磁共振波谱仪磁体结构紧凑，留给探头空间有限，对圆极化线圈的设计造成挑战．在桌面磁共振波谱仪中未有其它研究者采用过圆极化线圈．基于实验室自研桌面磁共振波谱仪平台，本文设计并制作了一套基于柔性版的收发一体圆极化线圈，该线圈由一组正交的鞍形线圈和亥姆霍兹线圈构成．首先根据探测目标区域的结构参数确定了单匝线圈的支撑结构与尺寸，然后使用Ansys Maxwell磁场仿真软件确定了圆极化线圈的最优匝数，最后使用自研圆极化探头结合外围射频电路对CuSO₄溶液进行了测试并以此评估该圆极化线圈的性能．实验结果表明，组合构成的圆极化线圈与单通道鞍形线圈和亥姆霍兹线圈相比，SNR分别提升了28.78%和29.21%，发射功率约节省了37.5%，证明圆极化线圈能够有效提升桌面磁共振波谱仪探头性能．

关键词: 磁共振波谱（MRS）, 正交线圈, 线圈优化, 双通道探头

Abstract:

Signal-to-noise ratio (SNR) is a key parameter governing signal quality in benchtop MRS spectrometers, where quadrature circularly polarized coils offer an effective means to enhance SNR. However, the confined space within the compact magnets of desktop systems poses challenges for implementing such coils—a strategy previously unattempted in this domain. Leveraging a self-developed desktop MRS platform, this study designed and fabricated a flexible printed circuit-based transceiver-integrated circularly polarized coil system, comprising orthogonally arranged saddle and Helmholtz coils. The coil geometry was optimized through Ansys Maxwell simulations, and experimental validation using CuSO₄ solution demonstrated SNR improvements of 28.78% and 29.21% over single-channel saddle and Helmholtz coils, respectively, alongside a 37.5% reduction in reflected power. These results confirm the viability of circularly polarized coils for advancing desktop MRS probe performance.

Key words: magnetic resonance spectroscopy (MRS), quadrature coils, coil optimization, dual-channel probe

中图分类号:

O482.53

汤世豪, 杨谨毓, 徐雅洁, 王亚, 彭博文, 高宇昊, 杨晓冬. 一种用于低场磁共振波谱仪的圆极化线圈设计[J]. 波谱学杂志, 2025, 42(3): 308-320.

TANG Shihao, YANG Jinyu, XU Yajie, WANG Ya, PENG Bowen, GAO Yuhao, YANG Xiaodong. A Design of Circularly Polarized Coil for Low-field Nuclear Magnetic Resonance Spectrometers[J]. Chinese Journal of Magnetic Resonance, 2025, 42(3): 308-320.

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线圈匝数	归一化线圈相对信噪比SNRc	射频场不均匀度δ	综合性能FoM
1	5.37×10^-4	0.56	0.96×10^-3
2	7.25×10^-4	0.63	1.14×10^-3
3	8.16×10^-4	0.79	1.03×10^-3
4	8.36×10^-4	0.97	0.86×10^-3

线圈匝数	归一化线圈相对信噪比SNRc	射频场不均匀度δ	综合性能FoM
2	4.92×10^-4	0.76	6.46×10^-4
3	5.56×10^-4	0.67	8.30×10^-4
4	5.90×10^-4	0.70	8.37×10^-4
5	6.03×10^-4	0.72	8.41×10^-4
6	6.08×10^-4	0.73	8.28×10^-4

一种用于低场磁共振波谱仪的圆极化线圈设计

A Design of Circularly Polarized Coil for Low-field Nuclear Magnetic Resonance Spectrometers

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