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1. 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。

2. 发明授权

US5973582A Resonance imager mobile van magnetic field homogeneity shift compensation 失效
标题翻译：共振成像机移动面包车磁场均匀性移位补偿
公开(公告)号：US5973582A
公开(公告)日：1999-10-26
申请号：US195128
申请日：1998-11-18
申请人： Timothy John Havens , Chung-Yih Ho , Xianrui Huang , Steven Ho-Chong Wong , Bu-Xin Xu , Minfeng Xu
发明人： Timothy John Havens , Chung-Yih Ho , Xianrui Huang , Steven Ho-Chong Wong , Bu-Xin Xu , Minfeng Xu
IPC分类号： H01F6/00 , G01R33/3873 , H01F7/00
CPC分类号： G01R33/3873
摘要： In the installation of a superconducting magnet for magnetic resonance imaging at a preselected position in a mobile van, preselected curvilinear magnetic segments are applied to preselected locations on the exterior of the magnet to counteract magnet inhomogeneities in the imaging bore which would otherwise occur because of magnetic material in the van structure.
摘要翻译：在用于在移动式货车中的预选位置安装用于磁共振成像的超导磁体的情况下，将预选的曲线磁段施加到磁体外部的预选位置以抵消成像孔中的磁体不均匀性，否则将由于磁性而发生货车结构材料。

3. 发明授权

US06181137B2 Unified shimming for magnetic resonance superconducting magnets 有权
标题翻译：用于磁共振超导磁体的统一匀场
公开(公告)号：US06181137B2
公开(公告)日：2001-01-30
申请号：US09360712
申请日：1999-07-26
申请人： Timothy John Havens , Xianrui Huang , Robert Sethfield Smith , Steven Ho-Chong Wong , Michele Ogle , Bu-Xin Xu , Minfeng Xu
发明人： Timothy John Havens , Xianrui Huang , Robert Sethfield Smith , Steven Ho-Chong Wong , Michele Ogle , Bu-Xin Xu , Minfeng Xu
IPC分类号： G01V300
CPC分类号： G01R33/387
摘要： A method for shimming a magnetic resonance imaging magnet requiring higher magnetic field homogneity on a small imaging volume and by magnetic field measurements on a larger volume providing small measurement error and practical field strength measurements and utilizing the spherical harmonic coefficients of the measurements.
摘要翻译：一种用于对在小成像体积上需要较高磁场均匀性的磁共振成像磁体进行匀场的方法以及通过较大体积的磁场测量来提供小的测量误差和实际的场强度测量并利用测量的球谐函数。

4. 发明申请

US20060208732A1 METHOD AND APPARATUS FOR PASSIVE SHIMMING OF MAGNETS 失效
标题翻译：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
申请人： Weijun Shen , Minfeng Xu , Bu-Xin Xu
发明人： Weijun Shen , Minfeng Xu , Bu-Xin Xu
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。

5. 发明授权

US07196520B2 Method and apparatus for passive shimming of magnets 失效
标题翻译：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
申请人： Weijun Shen , Minfeng Xu , Bu-Xin Xu
发明人： Weijun Shen , Minfeng Xu , Bu-Xin Xu
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。

6. 发明授权

US06289681B1 Superconducting magnet split cryostat interconnect assembly 失效
标题翻译：超导磁体分体式低温恒温器互连组件
公开(公告)号：US06289681B1
公开(公告)日：2001-09-18
申请号：US09441897
申请日：1999-11-17
申请人： Phillip William Eckels , Richard Thomas Hackett , Gregory F. Hayworth , Xianrui Huang , Clifford J. Ginfrida , Gregory Alan Lehmann , John Scaturro, Jr. , Bu-Xin Xu
发明人： Phillip William Eckels , Richard Thomas Hackett , Gregory F. Hayworth , Xianrui Huang , Clifford J. Ginfrida , Gregory Alan Lehmann , John Scaturro, Jr. , Bu-Xin Xu
IPC分类号： F17C502
CPC分类号： F17C3/085 , F17C2265/033 , F17C2270/0509 , G01R33/3802 , G01R33/3804 , G01R33/3806 , H01F6/04
摘要： A multi purpose interconnect assembly between upper and lower helium vessels in a recondensing superconducting magnet to provide isothermal connections to extend the ride-through period, and to provide for helium liquid and gas passage, electrical interconnections, and to accommodate differential thermal contraction and expansion.
摘要翻译：在再冷凝超导磁体中的上和下氦容器之间的多用途互连组件，以提供等温连接以延长穿越周期，并提供氦气和气体通道，电互连，并适应不同的热收缩和膨胀。

7. 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。

8. 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。

9. 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。

10. 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。

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