公开(公告)号：US4777464A

公开(公告)日：1988-10-11

申请号：US101365

申请日：1987-09-25

申请人： Hirofumi Takabatashi ,  Hideya Sakurai

发明人： Hirofumi Takabatashi ,  Hideya Sakurai

IPC分类号： G01R33/38 ,  G01R33/383 ,  H01F7/02

CPC分类号： H01F7/0278 ,  G01R33/3806 ,  G01R33/383

摘要： A magnetic field generating device for the NMR-CT comprises a pair of opposing permanent magnet segments magnetically coupled by a yoke which define therebetween an air gap where a magnetic field is created. Each segment has a pole piece attached to its gap-facing surface. Each segment is composed of a ferrite magnet and a rare earth magnet, one of the two magnets being disposed in the central portion of the segment and the other disposed around the one magnet. The thickness of the ferrite magnet in the direction of attaching it to the yoke is larger than that of the rare earth magnet.

摘要翻译： 用于NMR-CT的磁场产生装置包括一对相对的永磁体段，磁轭通过磁轭磁耦合，在其间限定产生磁场的气隙。 每个段具有连接到其面向间隙的表面的极片。 每个段由铁氧体磁体和稀土磁体组成，两个磁体中的一个设置在该段的中心部分，另一个设置在一个磁体周围。 铁氧体磁铁的附着方向的厚度大于稀土类磁铁的厚度。