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1. 发明授权

US06664878B1 Method for assembling magnetic members for magnetic resonance imaging magnetic field generator 有权
标题翻译：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
申请人： William E-Wei Chen , Jinhua Huang , Ronald Floyd Lochner , Weijun Shen , Geer Ward , Bu-Xin Xu
发明人： William E-Wei Chen , Jinhua Huang , Ronald Floyd Lochner , Weijun Shen , Geer Ward , Bu-Xin Xu
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。

2. 发明授权

US06859123B2 Methods and apparatus for positioning permanent magnetic blocks 失效
标题翻译：定位永磁块的方法和装置
公开(公告)号：US06859123B2
公开(公告)日：2005-02-22
申请号：US10406531
申请日：2003-04-03
申请人： Jinsheng Zheng , Jinhua Huang , Ronald Floyd Lochner , Weijun Shen , Hideaki Uno , Geer Ward , Bu-Xin Xu
发明人： Jinsheng Zheng , Jinhua Huang , Ronald Floyd Lochner , Weijun Shen , Hideaki Uno , Geer Ward , Bu-Xin Xu
IPC分类号： A61B5/055 , G01R33/383 , H01F7/02 , H01F7/00
CPC分类号： H01F7/0278 , G01R33/383 , Y10T29/49014
摘要： A method for positioning permanent magnetic blocks includes providing a plurality of magnetized blocks, positioning the magnetized blocks on a yoke in a row by applying a mechanical force at a first end of the row with a first clamping member and at a second end of the row with a second clamping member, and repositioning the blocks by reducing the mechanical force at the first end by moving the first clamping member away from the first end, and moving the second clamping member toward the second end.
摘要翻译：用于定位永磁块的方法包括提供多个磁化块，通过用第一夹紧构件在该行的第一端处施加机械力并且在该行的第二端处施加机械力将磁化块定位在一个轭上具有第二夹紧构件，并且通过使第一夹紧构件远离第一端而减小第一端部的机械力，并且使第二夹紧构件向第二端移动，来重新定位块体。

3. 发明授权

US06844801B2 Methods and apparatus for adjusting center magnetic field of a magnetic field generator for MRI 失效
标题翻译：用于调整MRI磁场发生器中心磁场的方法和装置
公开(公告)号：US06844801B2
公开(公告)日：2005-01-18
申请号：US10407887
申请日：2003-04-04
申请人： Jinhua Huang , Bu-Xin Xu , Weijun Shen , Ronald Floyd Lochner
发明人： Jinhua Huang , Bu-Xin Xu , Weijun Shen , Ronald Floyd Lochner
IPC分类号： G01R33/383 , A61B5/055 , G01R33/3873 , H01F7/00
CPC分类号： G01R33/3873
摘要： A product line of MRI systems includes a first MRI system including a first yoke and a plurality of magnet blocks forming a first central assembly disposed on the first yoke. The product line also includes a second MRI system including a second yoke, a plurality of magnet blocks forming a second central assembly disposed on the second yoke and shaped the same as the first central assembly, and a first set of magnet blocks mounted to the second yoke at a periphery of the second central assembly.
摘要翻译： MRI系统的产品系列包括第一MRI系统，其包括第一磁轭和形成设置在第一磁轭上的第一中心组件的多个磁体块。产品线还包括第二MRI系统，其包括第二磁轭，多个磁体块，形成设置在第二磁轭上并与其成形为第一中心组件的第二中心组件，以及安装到第二磁体块的第一组磁体块轭在第二中心组件的周边。

4. 发明授权

US06717781B2 Balanced quench protection circuit 有权
标题翻译：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
申请人： Minfeng Xu , Xianrui Huang , Bu-Xin Xu , Jinhua Huang
发明人： Minfeng Xu , Xianrui Huang , Bu-Xin Xu , Jinhua Huang
IPC分类号： H02H700
CPC分类号： H01F6/02 , H01F6/008 , H02H7/001 , Y02E40/68
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。

5. 发明授权

US06819108B2 Method of magnetic field controlled shimming 失效
标题翻译：磁场调节方法
公开(公告)号：US06819108B2
公开(公告)日：2004-11-16
申请号：US10410416
申请日：2003-04-09
申请人： Jinhua Huang , Bu-Xin Xu , Bijan Dorri , Bruce Amm
发明人： Jinhua Huang , Bu-Xin Xu , Bijan Dorri , Bruce Amm
IPC分类号： G01V300
CPC分类号： G01R33/3873 , G01R33/3875
摘要： The present invention is directed to a method of shimming a magnet assembly of an MR imaging system such that a desired B0 field strength may be created with minimal inhomogeneities therethrough. With this method, sufficient shimming of the magnet assembly may be achieved without requiring mechanical variations to the magnet assembly after the magnet assembly has been assembled. The invention analyzes variations from the desired B0 field and inhomogeneities at a number of target points along the magnet assembly or B0 field. A comparison is then made at each point to determine a shimming or weighting factor such that the desired overall B0 field strength and targeted field homogeneity is achieved. Active and/or passive shim elements may then be incorporated into the magnet assembly at each target point to achieve the desired overall field strength and minimum overall field homogeneity.
摘要翻译：本发明涉及一种对MR成像系统的磁体组件进行匀场的方法，使得可以以最小的非均匀性通过其产生所需的B0场强。利用这种方法，可以在磁体组件组装之后不需要对磁体组件的机械变化来实现磁体组件的足够的垫片。本发明分析了沿着磁体组件或B0场的多个目标点处的期望的B0场和不均匀性的变化。然后在每个点进行比较以确定匀场或加权因子，使得实现期望的总体B0场强和目标场均匀性。然后可以在每个目标点处将主动和/或被动垫片元件并入到磁体组件中，以实现期望的总场强和最小的整体场均匀性。

6. 发明授权

US06984982B2 Method and system for shimming an MRI magnet assembly 失效
标题翻译： MRI磁体组件匀场方法和系统
公开(公告)号：US06984982B2
公开(公告)日：2006-01-10
申请号：US10064589
申请日：2002-07-29
申请人： Jinhua Huang , Bu-Xin Xu
发明人： Jinhua Huang , Bu-Xin Xu
IPC分类号： G01V3/00
CPC分类号： G01R33/3873
摘要： Described herein is a method and system for shimming an MRI magnetic field generating assembly, wherein a plurality of shims are secured relative to a surface of the magnetic field generating assembly to at least partially correct inhomogeneities in the magnetic field generated by the magnetic field generating assembly. In one aspect, the shims are arranged along a plurality of concentric geometric shapes each having at least five sides. In an alternative aspect, the shims are arranged in a plurality of rows and columns, where the rows are normal to the columns. In another aspect, at least one of the shims is a flat plate of magnetic material including a top edge, a bottom edge, side edges, and face surfaces. The bottom edge is the proximal portion of the flat plate relative to the magnetic field generating assembly, the top edge is the distal portion of the flat plate relative to the magnetic field generating assembly, and the face surfaces are aligned with a direction of the magnetic field generated by the magnetic field generating assembly.
摘要翻译：本文描述了一种用于匀场MRI磁场产生组件的方法和系统，其中多个垫片相对于磁场产生组件的表面固定，以至少部分地校正由磁场产生组件产生的磁场中的不均匀性。在一个方面，垫片沿着多个具有至少五个边的同心几何形状布置。在替代方面，垫片被布置成多个行和列，其中行与垂直于列。在另一方面，垫片中的至少一个是磁性材料的平板，包括顶部边缘，底部边缘，侧边缘和面部表面。底边缘是相对于磁场产生组件的平板的近端部分，顶边缘是平板相对于磁场产生组件的远端部分，并且面表面与磁场方向一致由磁场产生组件产生的磁场。

7. 发明授权

US06960914B2 Methods and apparatus for imaging systems 失效
标题翻译：成像系统的方法和装置
公开(公告)号：US06960914B2
公开(公告)日：2005-11-01
申请号：US10607747
申请日：2003-06-27
申请人： Weijun Shen , Jinhua Huang
发明人： Weijun Shen , Jinhua Huang
IPC分类号： G01R33/389 , G01V3/00
CPC分类号： G01R33/389
摘要： A method of operating an imaging system having a main coil and a shield coil electromagnetically coupled to the main coil, wherein the method includes monitoring for an external environmental fluctuation of electromagnetism, and controlling current flow through the main and shield coils based upon the monitoring using a quench heater.
摘要翻译：一种操作具有与主线圈电磁耦合的主线圈和屏蔽线圈的成像系统的方法，其中所述方法包括监视电磁场的外部环境波动，以及基于使用所述主线圈和所述屏蔽线圈的监视来控制通过所述主屏蔽线圈的电流淬火加热器。

8. 发明申请

US20060158291A1 Magnetic field generating device and method of shimming thereof 有权
标题翻译：磁场产生装置及其垫片的方法
公开(公告)号：US20060158291A1
公开(公告)日：2006-07-20
申请号：US11385380
申请日：2006-03-21
申请人： Jinhua Huang , Hongliang Lu
发明人： Jinhua Huang , Hongliang Lu
IPC分类号： H01F3/00
CPC分类号： G01R33/3873 , H01F7/0273
摘要： A magnetic field generating device is disclosed having an arrangement of permanent magnets, each permanent magnet (PM) having a north end and a south end, and each aligned in the same north-south orientation. The PM arrangement is configured to have a surface at the north polarity end, a surface at the south polarity end, or a surface at both ends. A layer of ferromagnetic material is securely disposed at one of the surfaces of the PM arrangement, the layer having a thickness equal to or less than about 15 millimeters.
摘要翻译：公开了一种磁场产生装置，其具有永磁体的布置，每个永磁体（PM）具有北端和南端，并且各自以相同的南北取向对准。 PM布置被配置为具有在北极端部的表面，在南极端部的表面或两端的表面。一层铁磁材料牢固地设置在PM布置的一个表面上，该层的厚度等于或小于约15毫米。

9. 发明申请

US20050231859A1 Methods and apparatus for protecting an MR imaging system 有权
标题翻译：用于保护MR成像系统的方法和装置
公开(公告)号：US20050231859A1
公开(公告)日：2005-10-20
申请号：US10826643
申请日：2004-04-16
申请人： Jinhua Huang
发明人： Jinhua Huang
IPC分类号： G01R33/36 , G01R33/3815 , H01F6/02 , H02H7/00
CPC分类号： G01R33/288 , G01R33/3815 , G01R33/421 , H02H7/001 , Y02E40/68
摘要： A method of protecting an MR imaging system including a plurality of coil groups includes connecting at least one first diode between terminals of a first coil group, connecting at least one second diode between terminals of a second coil group, wherein the second group is connected to the first coil group via a separation line, and connecting at least one quench heater between the separation line and the first and second diodes.
摘要翻译：保护包括多个线圈组的MR成像系统的方法包括将第一线圈组的端子之间的至少一个第一二极管连接在一起，将第二线圈组的端子之间的至少一个第二二极管连接在一起，其中第二组连接到所述第一线圈组经由分离线，并且在所述分离线与所述第一和第二二极管之间连接至少一个骤冷加热器。

10. 发明授权

US08514043B2 Systems and methods for passively shielding a magnetic field 有权
标题翻译：被动屏蔽磁场的系统和方法
公开(公告)号：US08514043B2
公开(公告)日：2013-08-20
申请号：US11225957
申请日：2005-09-14
申请人： Jian-She Wang , Jinhua Huang , Stephen R. Elgin
发明人： Jian-She Wang , Jinhua Huang , Stephen R. Elgin
IPC分类号： H01F7/00
CPC分类号： G01R33/421 , H01F6/00 , H01F27/365
摘要： A passive magnetic field shielding system for shielding a fringe magnetic field is described. The passive magnetic field shielding system includes a magnet configured to generate a uniform magnetic field, an imaging system with associated electronics coupled to the magnet, and a passive shield configured to reduce the strength of the fringing magnetic field to approximately five Gauss at a distance from the passive shield.
摘要翻译：描述了用于屏蔽边缘磁场的无源磁场屏蔽系统。被动磁场屏蔽系统包括被配置为产生均匀磁场的磁体，具有耦合到磁体的相关电子器件的成像系统以及被配置为将边缘磁场的强度降低到距离被动屏蔽。

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