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公开(公告)号：US20100277170A1
公开(公告)日：2010-11-04
申请号：US12268205
申请日：2008-11-10
申请人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
发明人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
CPC分类号： G01R33/3815 , G01R33/3802 , G01R33/3804
摘要： A system and method for a magnetic resonance (MR) imaging system includes a coil form, at least one magnet positioned about the coil form and configured to generate a magnetic field, at least one gradient coil for manipulating the magnetic field generated by the at least one magnet by way of a gradient field, and a heat pipe thermally connected to the coil form and having a cryogen therein. The MR imaging system also includes a cryocooler connected to the heat pipe to cool the heat pipe and the cryogen, wherein the coil form is comprised of a thermally conductive material in which eddy currents are substantially reduced during operation of the at least one gradient coil. The present invention has been described in terms of the preferred embodiment, and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
摘要翻译： 用于磁共振（MR）成像系统的系统和方法包括线圈形式，围绕线圈形状定位并被配置为产生磁场的至少一个磁体，至少一个梯度线圈，用于操纵由至少一个 通过梯度场的一个磁体，以及热连接到线圈形式并且在其中具有冷冻剂的热管。 MR成像系统还包括连接到热管以冷却热管和冷冻剂的低温冷却器，其中线圈形式由导热材料组成，其中涡流在至少一个梯度线圈的操作期间显着减小。 已经根据优选实施例描述了本发明，并且认识到除了明确说明的那些之外的等同物，替代方案和修改是可能的并且在所附权利要求的范围内。
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公开(公告)号：US08085047B2
公开(公告)日：2011-12-27
申请号：US12268205
申请日：2008-11-10
申请人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
发明人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
IPC分类号： G01V3/00
CPC分类号： G01R33/3815 , G01R33/3802 , G01R33/3804
摘要： A system and method for a magnetic resonance (MR) imaging system includes a coil form, at least one magnet positioned about the coil form and configured to generate a magnetic field, at least one gradient coil for manipulating the magnetic field generated by the at least one magnet by way of a gradient field, and a heat pipe thermally connected to the coil form and having a cryogen therein. The MR imaging system also includes a cryocooler connected to the heat pipe to cool the heat pipe and the cryogen, wherein the coil form is comprised of a thermally conductive material in which eddy currents are substantially reduced during operation of the at least one gradient coil. The present invention has been described in terms of the preferred embodiment, and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
摘要翻译： 用于磁共振（MR）成像系统的系统和方法包括线圈形式，围绕线圈形状定位并被配置为产生磁场的至少一个磁体，至少一个梯度线圈，用于操纵由至少一个 通过梯度场的一个磁体，以及热连接到线圈形式并且在其中具有冷冻剂的热管。 MR成像系统还包括连接到热管以冷却热管和冷冻剂的低温冷却器，其中线圈形式由导热材料组成，其中涡流在至少一个梯度线圈的操作期间显着减小。 已经根据优选实施例描述了本发明，并且认识到除了明确说明的那些之外的等同物，替代方案和修改是可能的并且在所附权利要求的范围内。
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公开(公告)号：US07449889B1
公开(公告)日：2008-11-11
申请号：US11768016
申请日：2007-06-25
申请人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
发明人： Xianrui Huang , Bulent Aksel , Kathleen M. Amm , Evangelos T. Laskaris , Ernst W. Stautner , Paul S. Thompson , Anbo Wu , Minfeng Xu , Yan Zhao
IPC分类号： G01V3/00
CPC分类号： G01R33/3815 , G01R33/3802 , G01R33/3804
摘要： A system and method for a magnetic resonance (MR) imaging system includes a coil form, at least one magnet positioned about the coil form and configured to generate a magnetic field, at least one gradient coil for manipulating the magnetic field generated by the at least one magnet by way of a gradient field, and a heat pipe thermally connected to the coil form and having a cryogen therein. The MR imaging system also includes a cryocooler connected to the heat pipe to cool the heat pipe and the cryogen, wherein the coil form is comprised of a thermally conductive material in which eddy currents are substantially reduced during operation of the at least one gradient coil. The present invention has been described in terms of the preferred embodiment, and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
摘要翻译： 用于磁共振（MR）成像系统的系统和方法包括线圈形式，围绕线圈形状定位并被配置为产生磁场的至少一个磁体，至少一个梯度线圈，用于操纵由至少一个 通过梯度场的一个磁体，以及热连接到线圈形式并且在其中具有冷冻剂的热管。 MR成像系统还包括连接到热管以冷却热管和冷冻剂的低温冷却器，其中线圈形式由导热材料组成，其中涡流在至少一个梯度线圈的操作期间显着减小。 已经根据优选实施例描述了本发明，并且认识到除了明确说明的那些之外的等同物，替代方案和修改是可能的并且在所附权利要求的范围内。
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公开(公告)号：US07498814B1
公开(公告)日：2009-03-03
申请号：US11930953
申请日：2007-10-31
申请人： Xianrui Huang , Minfeng Xu , Evangelos Trifon Laskaris , Paul St. Mark Shadforth Thompson , Bulent Aksel , Kathleen Melanie Amm , Anbo Wu , Yan Zhao
发明人： Xianrui Huang , Minfeng Xu , Evangelos Trifon Laskaris , Paul St. Mark Shadforth Thompson , Bulent Aksel , Kathleen Melanie Amm , Anbo Wu , Yan Zhao
IPC分类号： G01V3/00
CPC分类号： G01R33/3815
摘要： A magnet assembly for a Magnetic Resonance Imaging (MRI) system includes a vacuum vessel including an inner cylinder, an outer cylinder and a pair of tapered flanges connecting the inner and outer cylinders. The inner cylinder is made of a composite material. The outer cylinder and flanges are composed of several magnetic segments that provide a magnetic flux return path with low eddy currents. The segments are bonded together and electrically insulated from each other. A container, a thermal shield and a superconducting magnet coil assembly are disposed within the vacuum vessel. The superconducting magnet coil assembly includes a non-conductive cylindrical structure and superconducting coils. A thermally conductive cable is wrapped around the cylindrical structure and coils to form a thermally conductive envelope.
摘要翻译： 用于磁共振成像（MRI）系统的磁体组件包括真空容器，其包括内筒，外筒和连接内筒和外筒的一对锥形凸缘。 内筒由复合材料制成。 外筒和法兰由几个磁段组成，提供具有低涡流的磁通返回路径。 这些段彼此结合在一起并且电绝缘。 容器，热屏蔽和超导磁体线圈组件设置在真空容器内。 超导磁体线圈组件包括非导电圆柱形结构和超导线圈。 导热电缆缠绕在圆柱形结构和线圈周围以形成导热外壳。
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公开(公告)号：US07852079B2
公开(公告)日：2010-12-14
申请号：US11461544
申请日：2006-08-01
CPC分类号： G01R33/3815 , G01R33/3804
摘要： A apparatus for low AC loss thermal shielding includes a plurality of thermally conducting fibers positioned along a desired direction of heat conduction. The fibers are electrically insulated from each other. The fibers are bonded together with a matrix, and a thermal link connects the bonded fibers to a cryogenic cold head.
摘要翻译： 用于低AC损耗热屏蔽的装置包括沿期望的热传导方向定位的多个导热纤维。 纤维彼此电绝缘。 纤维与基体结合在一起，并且热连接将结合的纤维连接到低温冷头。
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公开(公告)号：US20100237868A1
公开(公告)日：2010-09-23
申请号：US11461544
申请日：2006-08-01
CPC分类号： G01R33/3815 , G01R33/3804
摘要： A apparatus for low AC loss thermal shielding includes a plurality of thermally conducting fibers positioned along a desired direction of heat conduction. The fibers are electrically insulated from each other. The fibers are bonded together with a matrix, and a thermal link connects the bonded fibers to a cryogenic cold head.
摘要翻译： 用于低AC损耗热屏蔽的装置包括沿期望的热传导方向定位的多个导热纤维。 纤维彼此电绝缘。 纤维与基体结合在一起，并且热连接将结合的纤维连接到低温冷头。
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公开(公告)号：US20100242500A1
公开(公告)日：2010-09-30
申请号：US11530267
申请日：2006-09-08
CPC分类号： F28D15/02 , F17C2270/0527 , F25D19/006 , H01F6/04 , Y02E60/321
摘要： The present invention provides an apparatus and method for automatically disconnecting a cryocooler from a cold mass reservoir of a MR system. A cryocooler thermal link includes a first end plate configured to be thermally connected to a cryocooler and a second end plate configured to be thermally connected to a cold mass. A wall encloses a space between the first and the second end plates, the wall having a first end attached to the first end plate and a second end attached to the second end plate. A working fluid is positioned in the space.
摘要翻译： 本发明提供了一种用于将低温冷却器与MR系统的冷质储存器自动断开的装置和方法。 低温冷却器热连接件包括构造成热连接到低温冷却器的第一端板和被配置为热连接到冷块的第二端板。 壁围绕第一和第二端板之间的空间，壁具有附接到第一端板的第一端和附接到第二端板的第二端。 工作流体位于空间中。
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公开(公告)号：US08583201B2
公开(公告)日：2013-11-12
申请号：US13237805
申请日：2011-09-20
申请人： Anbo Wu , Minfeng Xu , Xianrui Huang
发明人： Anbo Wu , Minfeng Xu , Xianrui Huang
IPC分类号： G01R33/035
摘要： A superconducting magnet includes at least one superconducting coil and a quench protection circuit electrically coupled to said at least one coil in parallel. The circuit includes at least one quench heater assembly thermally coupled to the at least one coil, and at least one superconducting current limiter electrically connected in series with the at least one quench heater assembly. The superconducting current limiter has a superconducting state with zero resistance, and a normal state with a normal resistance to decrease an electric current flowing through the quench heater assembly.
摘要翻译： 超导磁体包括至少一个超导线圈和与所述至少一个线圈并联电耦合的骤冷保护电路。 该电路包括至少一个与该至少一个线圈耦合的骤冷加热器组件，以及至少一个与该至少一个骤冷加热器组件串联电连接的超导电流限制器。 超导限流器具有零电阻的超导状态和具有正常电阻的正常状态，以减少流过骤冷加热器组件的电流。
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公开(公告)号：US07477055B1
公开(公告)日：2009-01-13
申请号：US11842694
申请日：2007-08-21
申请人： Xianrui Huang , Paul S. Thompson , Minfeng Xu
发明人： Xianrui Huang , Paul S. Thompson , Minfeng Xu
IPC分类号： G01V3/00
CPC分类号： G01R33/3815
摘要： A system and method for connecting superconducting magnet coils made up of coil segments to allow an integrated winding concept. The integrated winding concept can include serially connecting coil segments of coil pairs in an alternating pattern, which causes coil pairs to be electrically symmetric. Symmetric coil pairs can eliminate or significantly reduce the currents in magnet coils induced by gradient or other pulses, produce a homogenous field, and reduce the accumulated voltages in the coils due to gradient pulsing.
摘要翻译： 用于连接由线圈段组成的超导磁体线圈以允许集成绕组概念的系统和方法。 集成绕组概念可以包括以交替模式串联线圈对的线圈段，这使线圈对电对称。 对称线圈对可以消除或显着减少由梯度或其他脉冲引起的磁体线圈中的电流，产生均匀的场，并且由于梯度脉冲而减少线圈中的累积电压。
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公开(公告)号：US08487727B2
公开(公告)日：2013-07-16
申请号：US13218517
申请日：2011-08-26
申请人： Anbo Wu , Yan Zhao , Chao Yang , Evangelos Trifon Laskaris , Xianrui Huang
发明人： Anbo Wu , Yan Zhao , Chao Yang , Evangelos Trifon Laskaris , Xianrui Huang
CPC分类号： G01R33/3815 , G01R33/421 , Y10T29/49014
摘要： A superconducting magnet assembly is provided. The superconducting magnet assembly includes a superconducting magnet configured to generate a static magnetic field, an iron shield configured to shield the superconducting magnet, and a magnetic gradient coil assembly configured to generate a gradient magnetic field. The superconducting magnet assembly further includes one or more magnetic lamination elements disposed on the iron shield to reduce eddy current induced by the gradient magnetic field in the iron shield. A method is also presented.
摘要翻译： 提供超导磁体组件。 超导磁体组件包括被配置为产生静态磁场的超导磁体，被配置为屏蔽超导磁体的铁屏蔽以及被配置为产生梯度磁场的磁梯度线圈组件。 超导磁体组件还包括设置在铁屏蔽上的一个或多个磁性层压元件，以减少由铁屏蔽层中的梯度磁场引起的涡电流。 还提出了一种方法。
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