一种新型Inside-Out核磁共振传感器——三圆柱磁体阵列

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摘要介绍了一种新型的inside-out核磁共振传感器。该传感器磁体结构由三个沿轴向磁化的圆柱形永磁体同轴排列而成,结构紧凑。通过调节三个磁体之间的距离,可以在磁体结构外侧建立起径向对称的均匀静态磁场或有恒定梯度的静态磁场B₀,其方向平行于传感器轴向。为了满足射频磁场B₁垂直于静态磁场B₀的要求,射频线圈采用马鞍形结构。传感器直径为2.8cm,长度为6cm,重为200g。该传感器磁体结构简单,且灵敏区域相对其本身尺寸较大。

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	郭盼
	何为
	JuanC.Garcí
	a-Naranjo
	Bruce J. Balcom

关键词 ： Inside-out核磁共振传感器, 三圆柱磁体阵列, 均匀磁场, 恒定梯度磁场, 马鞍形线圈

Abstract：A new inside-out nuclear magnetic resonance (NMR) sensor is presented. This design combines three cylindrical magnets (poles opposed) which are magnetized in the axial direction, and the structure is compact. By adjusting the space between the cylinders, it was found that a radially symmetric homogeneous magnetic field or extended constant gradient can be obtained, and the orientation of the static magnetic field B₀ is parallel to the axis of the sensor. To generate a radio frequency field B₁ perpendicular to the static field B₀, a saddle coil was employed for the RF probe. The sensor is 2.8cm in diameter, 6cm in length and 200g in weight. This sensor is simple and the sensitive region is relatively big comparing to its size.

Key words： Inside-out nuclear magnetic resonance sensor three-cylinder array homogeneous magnetic field constant gradient magnetic field saddle coil

收稿日期: 2014-04-08 出版日期: 2016-04-28

PACS:

O482.53+2

基金资助:国家重点基础研究发展计划（973计划）（2014CB541600）,国家自然科学基金面上项目（51377186）和国家自然科学基金青年基金（51107150）资助

通讯作者: 郭盼女,1987年生,博士,研究方向单边核磁共振传感器设计及其应用。E-mail: guopan0822@163.com E-mail: hewei@cqu.edu.cn

作者简介: 何为男,1957年生,教授,博士生导师,研究方向电磁场理论及计算方法、电磁成像技术和电磁数字化测量仪器。E-mail: hewei@cqu.edu.cn

引用本文:

郭盼, 何为, JuanC.García-Naranjo, Bruce J. Balcom. 一种新型Inside-Out核磁共振传感器——三圆柱磁体阵列[J]. 电工技术学报, 2016, 31(8): 96-101. Guo Pan, He Wei, Juan C. García-Naranjo, Bruce J. Balcom. A New Inside-Out Nuclear Magnetic Resonance Sensor ——Three-Cylinder Array. Transactions of China Electrotechnical Society, 2016, 31(8): 96-101.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2016/V31/I8/96

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