TM110模式DNP探头的研制与应用
收稿日期: 2015-05-06
修回日期: 2016-01-23
网络出版日期: 2016-03-05
基金资助
国家重大科研装备研制项目(ZDYZ2010-2),国家自然科学基金资助项目(11405264),国家重大科学仪器设备开发专项资助项目(2011YQ120035).
A TM110 Dynamic Nuclear Polarization Probe: Design and Applications
Received date: 2015-05-06
Revised date: 2016-01-23
Online published: 2016-03-05
为了满足自主研发的X波段动态核极化系统(DNP-NMR/MRI)对探头的需求,设计制作了用于动态核极化的TM110模式圆柱形谐振腔探头.通过理论分析计算得到了探头腔体的初步尺寸,进而利用软件对其完整结构做进一步的仿真优化,并测试了基于优化参数设计加工的探头的性能参数.完成了探头在自主研制的场强为0.35 T的DNP-NMR/MRI系统上的测试,得到了大于50倍信噪比(S/N)增强的质子信号,同时获得信噪比增强的磁共振影像.
关键词： 探头; 动态核极化(DNP); 磁共振成像(MRI); TM110; 谐振腔
陶泉 , 贺玉贵 , 王超 , 冯继文 , 陈方 , 刘朝阳 . TM110模式DNP探头的研制与应用[J]. 波谱学杂志, 2016 , 33(1) : 44 -53 . DOI: 10.11938/cjmr20160104
A cylindrical cavity working in TM110 mode at the X-band frequencies was designed and manufactured for dynamic nuclear polarization (DNP) systems. The dimensions of the cavity were theoretically calculated, and then optimized with the software Ansoft-HFSS. The fabricated probe was tested experimentally on a homebuilt DNP system. With the probe,1H NMR signal was acquired with more than 50-folds of sensitivity enhancement; and a clear DNP-enhanced image was obtained.
Key words： probe; dynamic nuclear polarization (DNP); MRI; TM110; cavity
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