一种新型Inside-Out核磁共振传感器——三圆柱磁体阵列  

A New Inside-Out Nuclear Magnetic Resonance Sensor ——Three-Cylinder Array

作　　者：郭盼[1,2] 何为[1] Juan C.García-Naranjo Bruce J.Balcom 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044 [2]新布伦瑞克大学磁共振成像中心 [3]东方大学医学生物物理学中心,古巴圣地亚哥90500

出　　处：《电工技术学报》2016年第8期96-101,共6页Transactions of China Electrotechnical Society

基　　金：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);国家自然科学基金青年基金(51107150)资助

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B_0,其方向平行于传感器轴向。为了满足射频磁场B_1垂直于静态磁场B_0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。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 B_0 is parallel to the axis of the sensor. To generate a radio frequency field B_1 perpendicular to the static field B_0, a saddle coil was employed for the RF probe. The sensor is 2.8cm in diameter, 6cm in length and 200 g in weight. This sensor is simple and the sensitive region is relatively big comparing to its size.

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 

分 类 号：O482.532[理学—固体物理]