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1. 发明授权

US4646046A Shielded room construction for containment of fringe magnetic fields 失效
标题翻译：屏蔽室结构用于容纳边缘磁场
公开(公告)号：US4646046A
公开(公告)日：1987-02-24
申请号：US673692
申请日：1984-11-21
申请人： Robert M. Vavrek , Nancy S. Grigsby
发明人： Robert M. Vavrek , Nancy S. Grigsby
IPC分类号： A61B5/055 , A61B10/00 , G01R33/421 , G12B17/02 , H01F7/20 , H01F7/00
CPC分类号： G12B17/02
摘要： A shielded room for containment of magnetic fringe fields generated by a magnet which forms part of an NMR scanner system utilizes wall members having a thickness proportional to the amount of flux conducted. In the preferred embodiments, the shielded room can have one of rectangular, cylindrical, or polygonal geometries, for example. The walls (floors and ceilings) are constructed from staggered plates to have increased thickness where flux is greatest, and correspondingly decreased thickness where the flux is lowest. The shielded room can be, additionally, provided with end-cap elements in the walls perpendicular to the base of the magnet. Preferentially, the end-cap elements are angled away from the side wall members toward the center of the room to more closely follow the flux path.
摘要翻译：用于容纳由形成NMR扫描器系统的一部分的磁体产生的磁性边缘场的屏蔽室利用具有与传导通量的量成比例的厚度的壁构件。在优选实施例中，屏蔽室可以具有例如矩形，圆柱形或多边形几何形状之一。墙壁（地板和天花板）由交错板构成，其中通量最大的厚度增加，并且通量最低的厚度相应减小。屏蔽室还可以在垂直于磁体底部的壁中设置端帽元件。优选地，端盖元件远离侧壁构件朝向房间的中心成一角度，以更紧密地跟随通量路径。

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