Balanced quench protection circuit
    3.
    发明授权
    Balanced quench protection circuit 有权
    平衡淬火保护电路

    公开(公告)号:US06717781B2

    公开(公告)日:2004-04-06

    申请号:US09682589

    申请日:2001-09-25

    IPC分类号: H02H700

    摘要: A superconducting magnet electrical circuit is provided for quench protection. A superconducting coil assemblage is provided including a plurality of spatially separated main and secondary magnet coil portions. The main magnet coil portions are connected in series to form at least one main coil series circuit. The secondary magnet coil portions are also connected in a series to form at least one secondary coil series circuit. At least one temperature limiting circuit is also provided. The temperature limiting circuit may be a quench heater circuit or a quench resistor circuit. The temperature limiting circuit has a plurality of quench heaters or a plurality of quench resistors connected with the superconducting coil assemblage. A superconductive switch is coupled with the superconducting coil assemblage.

    摘要翻译: 提供超导磁体电路用于淬火保护。 提供了包括多个空间分离的主和次级磁体线圈部分的超导线圈组件。 主电磁线圈部分串联连接以形成至少一个主线圈串联电路。 次级电磁线圈部分也被串联连接以形成至少一个次级线圈串联电路。 还提供至少一个温度限制电路。 温度限制电路可以是淬火加热器电路或淬火电阻电路。 温度限制电路具有与超导线圈组合件连接的多个骤冷加热器或多个骤冷电阻器。 超导开关与超导线圈组合连接。

    METHOD AND APPARATUS FOR PASSIVE SHIMMING OF MAGNETS
    4.
    发明申请
    METHOD AND APPARATUS FOR PASSIVE SHIMMING OF MAGNETS 失效
    磁体被动遮蔽的方法和装置

    公开(公告)号:US20060208732A1

    公开(公告)日:2006-09-21

    申请号:US10904094

    申请日:2004-10-22

    IPC分类号: G01V3/00 H01F7/02

    CPC分类号: G01R33/3873

    摘要: An apparatus and method for shimming a magnetic field of a magnet in a volume of interest includes a nonmagnetic holder configured with an array of fluid containing pockets; and a solidified ferromagnetic fluid in each pocket of the array of fluid containing pockets, wherein the solidified ferromagnetic fluid is fabricated from a ferromagnetic fluid, a diluting liquid, a hardener, and an accelerator agent. The ferromagnetic fluid includes a carrier liquid, ferromagnetic particles, and a surfactant.

    摘要翻译: 用于对感兴趣的体积中的磁体的磁场进​​行匀场的装置和方法包括:非磁性保持器,其配置有包含口袋的流体阵列; 以及在包含凹穴的流体阵列的每个凹槽中的固化铁磁流体,其中固化的铁磁流体由铁磁流体,稀释液体,固化剂和促进剂制成。 铁磁流体包括载液,铁磁颗粒和表面活性剂。

    Method and apparatus for passive shimming of magnets
    5.
    发明授权
    Method and apparatus for passive shimming of magnets 失效
    用于磁体被动调光的方法和装置

    公开(公告)号:US07196520B2

    公开(公告)日:2007-03-27

    申请号:US10904094

    申请日:2004-10-22

    IPC分类号: G01V3/00

    CPC分类号: G01R33/3873

    摘要: An apparatus and method for shimming a magnetic field of a magnet in a volume of interest includes a nonmagnetic holder configured with an array of fluid containing pockets; and a solidified ferromagnetic fluid in each pocket of the array of fluid containing pockets, wherein the solidified ferromagnetic fluid is fabricated from a ferromagnetic fluid, a diluting liquid, a hardener, and an accelerator agent. The ferromagnetic fluid includes a carrier liquid, ferromagnetic particles, and a surfactant.

    摘要翻译: 用于对感兴趣的体积中的磁体的磁场进​​行匀场的装置和方法包括:非磁性保持器,其配置有包含口袋的流体阵列; 以及在包含凹穴的流体阵列的每个凹槽中的固化铁磁流体,其中固化的铁磁流体由铁磁流体,稀释液体,固化剂和促进剂制成。 铁磁流体包括载液,铁磁颗粒和表面活性剂。

    System and method for magnetizing blocks on a magnet assembly of an MRI device
    7.
    发明授权
    System and method for magnetizing blocks on a magnet assembly of an MRI device 有权
    用于在MRI装置的磁体组件上磁化块的系统和方法

    公开(公告)号:US06958672B1

    公开(公告)日:2005-10-25

    申请号:US10710289

    申请日:2004-06-30

    申请人: Weijun Shen Bu-Xin Xu

    发明人: Weijun Shen Bu-Xin Xu

    IPC分类号: G01R33/383 H01F13/00

    CPC分类号: H01F13/003 G01R33/383

    摘要: A system and a method for magnetizing one of a plurality of substantially non-magnetized blocks disposed on a plate of a magnetic assembly used in an MRI device are provided. The system includes first and second arm portions operably coupled together. The system further includes a first electromagnetic coil disposed on a first end of the first arm portion, wherein the first electromagnetic coil is configured to generate a magnetic field that propagates from the first electromagnetic coil through at least one non-magnetized block and the plate and further through the first and second arm portions to magnetize the block.

    摘要翻译: 提供一种用于磁化设置在MRI装置中使用的磁性组件的板上的多个基本上非磁化块中的一个的系统和方法。 该系统包括可操作地联接在一起的第一和第二臂部分。 所述系统还包括设置在所述第一臂部分的第一端上的第一电磁线圈,其中所述第一电磁线圈被配置为产生从所述第一电磁线圈传播通过至少一个非磁化块和所述板的磁场,以及 还通过第一和第二臂部分来磁化块。

    Method for assembling magnetic members for magnetic resonance imaging magnetic field generator
    8.
    发明授权
    Method for assembling magnetic members for magnetic resonance imaging magnetic field generator 有权
    用于组装磁共振成像磁场发生器的磁性元件的方法

    公开(公告)号:US06664878B1

    公开(公告)日:2003-12-16

    申请号:US10064565

    申请日:2002-07-26

    IPC分类号: H01F702

    CPC分类号: G01R33/3806 G01R33/383

    摘要: Disclosed herein is a method for assembling a magnetic field generator for a magnetic resonance imaging system. The method comprises: establishing an arrangement for a permanent magnet of a magnet assembly comprising a ferromagnetic yoke plate and a permanent magnet, wherein the arrangement includes a portion of a cavity formed from placement of a portion of a plurality of retainers attached at substantially the perimeter of the yoke plate. The method also includes populating the first portion of the cavity with a set of rails attached to the yoke plate and affixing a plurality of gliders to a plurality of magnet blocks and magnetizing the gliders and magnet blocks to form a plurality of block assemblies. Finally, the method includes sliding each block assembly of the plurality of block assemblies along a rail of the set of rails; initiating with an outermost rail and concluding with an innermost, securing each successively filled rail with a retainer.

    摘要翻译: 本文公开了一种用于组装用于磁共振成像系统的磁场发生器的方法。 该方法包括:为包括铁磁轭板和永磁体的磁体组件的永磁体建立一种装置,其中该装置包括一部分空腔,该部分通过将大体上周边附接的多个保持器的一部分放置 的轭板。 该方法还包括用连接到轭板的一组轨道填充空腔的第一部分,并将多个滑翔机固定到多个磁体块上,并使滑行器和磁体块磁化以形成多个块组件。 最后,该方法包括沿着该组轨道的轨道滑动多个块组件的每个块组件; 用最外面的导轨起始,并用最内层结束,用固定器固定每个连续填充的轨道。

    Method for assembling magnetic members for magnetic resonance imaging magnetic field generator
    10.
    发明授权
    Method for assembling magnetic members for magnetic resonance imaging magnetic field generator 失效
    用于组装磁共振成像磁场发生器的磁性元件的方法

    公开(公告)号:US06828891B2

    公开(公告)日:2004-12-07

    申请号:US10064538

    申请日:2002-07-25

    IPC分类号: H01F500

    摘要: Disclosed herein is a magnetic field generator and method for assembling the same for a magnetic resonance imaging system, the method comprising: establishing a layout for a permanent magnet of a magnet assembly comprising a pole piece, a ferromagnetic plate yoke and a permanent magnet. The method also includes populating the layout with a plurality of mock-up sticks and block retainers to form a mock layout for the permanent magnet; and installing a magnet block in place of at least one mock-up stick of the plurality of mock-up sticks. Installing the magnet blocks includes pushing the magnet block along a selected slot formed by the displacement of at least one mock-up stick of the plurality of mock-up sticks.

    摘要翻译: 本发明公开了一种用于磁共振成像系统的磁场发生器及其组装方法,该方法包括:为包括极片,铁磁板轭铁和永久磁铁的磁体组件的永磁体建立布局。 该方法还包括用多个模型棒和块保持器填充布局以形成永磁体的模拟布局; 以及安装磁块代替多个模型棒中的至少一个模型棒。 安装磁体块包括沿着由多个模型棒中的至少一个模型棒的位移形成的所选狭缝推动磁体块。