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    Magnetic-field generator comprising a pole-piece unit
    1.
    发明公开
    Magnetic-field generator comprising a pole-piece unit 有权
    Magnetfeldgenerator mit einerPolstückeinheit

    公开(公告)号：EP1666910A1

    公开(公告)日：2006-06-07

    申请号：EP06110775.1

    申请日：2000-11-13

    申请人： Neomax Co., Ltd.

    发明人： Aoki, Masaaki ,  Tsuzaki, Tsuyoshi

    IPC分类号： G01R33/383 ,  H01F7/02

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

    摘要： A magnetic field generator comprises a pair of pole-piece units. The pair of pole-piece units respectively include plate yokes (12a,12b). Each of the plate yokes includes a surface facing the other's and provided with a permanent magnet group and a pole piece. The pole piece includes an annular projection (32) having a plurality of annular-projection pieces (34) and a permanent magnet (40) for reduction of magnetic flux leakage installed on an outside surface of each annular-projection piece. When assembling the pole piece, first, the permanent magnet for reduction of magnetic flux leakage is fixed on the outside surface of each annular-projection piece (34). At this time, the permanent magnet is slid on the flat outside surface of the annular-projection piece, to a desired position on the annular-projection piece, and then fixed. Each of the annular-projection pieces mounted with the permanent magnet is fixed on a base plate. At this time, the annular-projection piece is lowered on a guide stake attached on the base plate, allowing the stake into a guide hole formed in the annular-projection piece, thereby guiding the annular-projection piece onto the base plate.

    摘要翻译： 磁场发生器包括一对极片单元。 一对极靴单元分别包括板状轭（12a，12b）。 每个板状轭铁包括面对另一个的表面，并且设置有永磁体组和极片。 极片包括具有多个环形突起片（34）的环形突起（32）和用于减少安装在每个环形突起片的外表面上的磁通泄漏的永磁体（40）。 在组装极靴时，首先，在每个环形突片（34）的外表面上固定用于减少磁通泄漏的永久磁铁。 此时，将永磁体在环形突起片的平坦外表面上滑动到环形突起片上的期望位置，然后固定。 安装有永磁体的每个环形突起件固定在基板上。 此时，环形突起片在安装在基板上的引导片上降低，从而使得钉扎在形成在环形突起片中的引导孔中，从而将环形突起件引导到底板上。

    Method for assembling a magnetic field generator for MRI
    7.
    发明公开
    Method for assembling a magnetic field generator for MRI 有权
    用于组装用于MRI的磁场发生器的方法

    公开(公告)号：EP1557684A3

    公开(公告)日：2005-08-10

    申请号：EP05008190.0

    申请日：1999-07-22

    申请人： Neomax Co., Ltd.

    发明人： Aoki, Masaaki ,  Hashimoto, Shigeo

    IPC分类号： G01R33/383 ,  G01R33/38

    CPC分类号： G01R33/3806 ,  G01R33/3802 ,  G01R33/383 ,  Y10T29/49002 ,  Y10T29/4902 ,  Y10T29/49073 ,  Y10T29/49075 ,  Y10T29/49901 ,  Y10T29/49902 ,  Y10T156/1089

    摘要： A magnetic field generator for MRI comprises upper and lower magnet units, each including a plate yoke and a permanent magnet, and a column yoke magnetically connecting the part of magnet units. When the magnet unit and the column yoke are connected, the column yoke or the magnet unit is lowered so that a guiding rod attached to an end face of the column yoke is inserted into a hole formed in the magnetic unit. Further, the column yoke is guided by a guiding member disposed between a permanent magnet on the plate yoke and a position where the column yoke is to be connected on the plate yoke.

    摘要翻译： 用于MRI的磁场发生器包括上部和下部磁体单元，每个磁体单元包括板状磁轭和永磁体，以及磁轭连接部分磁体单元的柱状磁轭。 当磁体单元和柱状磁轭连接时，柱状磁轭或磁体单元降低，使得连接到柱状磁轭端面的导向杆插入形成在磁性单元中的孔中。 此外，柱状磁轭由设置在板状轭铁上的永磁体与柱状轭状物将连接在板状轭铁上的位置之间的引导构件引导。

    Method for assembling a magnetic field generator for MRI
    8.
    发明公开
    Method for assembling a magnetic field generator for MRI 有权
    Verfahren zum Zusammenbau eines Magnetfelderzeugersfürdie Magnetresonanzbildgebung

    公开(公告)号：EP1557684A2

    公开(公告)日：2005-07-27

    申请号：EP05008190.0

    申请日：1999-07-22

    申请人： Neomax Co., Ltd.

    发明人： Aoki, Masaaki ,  Hashimoto, Shigeo

    IPC分类号： G01R33/383 ,  G01R33/38

    CPC分类号： G01R33/3806 ,  G01R33/3802 ,  G01R33/383 ,  Y10T29/49002 ,  Y10T29/4902 ,  Y10T29/49073 ,  Y10T29/49075 ,  Y10T29/49901 ,  Y10T29/49902 ,  Y10T156/1089

    摘要： A magnetic field generator for MRI comprises upper and lower magnet units, each including a plate yoke and a permanent magnet, and a column yoke magnetically connecting the part of magnet units. When the magnet unit and the column yoke are connected, the column yoke or the magnet unit is lowered so that a guiding rod attached to an end face of the column yoke is inserted into a hole formed in the magnetic unit. Further, the column yoke is guided by a guiding member disposed between a permanent magnet on the plate yoke and a position where the column yoke is to be connected on the plate yoke.

    摘要翻译： 用于MRI的磁场发生器包括上磁体单元和下磁体单元，每个磁体单元包括板磁轭和永磁体，以及磁轭连接磁体单元。 当磁体单元和柱轭连接时，柱轭或磁体单元被降低，使得附接到柱轭的端面的引导杆插入到形成在磁单元中的孔中。 此外，柱轭被设置在板轭铁上的永久磁铁与柱轭连接在板架上的位置之间的引导构件引导。