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1.发明授权
公开(公告)号：US5633588A
公开(公告)日：1997-05-27
申请号：US525211
申请日：1995-09-08
申请人： Takao Hommei , Yutaka Takuma , Hirotaka Takeshima , Hiroyuki Takeuchi , Yoshiyuki Miyamoto , Kiyoshi Fukutomi , Hajime Kawano
发明人： Takao Hommei , Yutaka Takuma , Hirotaka Takeshima , Hiroyuki Takeuchi , Yoshiyuki Miyamoto , Kiyoshi Fukutomi , Hajime Kawano
IPC分类号： G01R33/3815 , G01R33/3875 , H01F6/00 , G01V3/00
CPC分类号： G01R33/3815 , H01F6/00 , G01R33/3875
摘要： A superconducting magnet apparatus which includes a cryostat vessel for containing therein a coolant for realizing superconductivity, a magnetic flux generating unit disposed within the cryostat vessel and including a superconducting multilayer composite member constituting a sustaining medium for a persistent current which generates a magnetic flux along a center axis of a predetermined magnetic field space, and members holding the magnetic field generating unit within the cryostat vessel.
摘要翻译： 一种超导磁体装置，包括用于容纳用于实现超导性的冷却剂的低温恒温器，设置在所述低温恒温器容器内的磁通量产生单元，并且包括构成持续电流的维持介质的超导多层复合构件，所述持续电流沿着 预定磁场空间的中心轴，以及将该磁场产生单元保持在低温恒温器容器内的构件。
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公开(公告)号：US5334966A
公开(公告)日：1994-08-02
申请号：US984333
申请日：1992-12-02
IPC分类号： A61B5/055 , G01R33/383 , H01F7/02
CPC分类号： G01R33/383
摘要： A magnetostatic field generator for a magnetic resonance imaging apparatus includes a pair of permanent magnets each having a rectangular parallelepiped shape arranged perpendicular to a direction of a uniform magnetic field to surround a space where a uniform magnetic field is generated, a plurality of first permanent magnets each having a trigonal prism shape arranged on both sides of an area between the permanent magnets each having a rectangular parallelepiped shape, a plurality of second permanent magnets each having a trigonal prism shape which are arranged between the permanent magnets each having a rectangular parallelepiped shape and the first permanent magnets and satisfy magnetic field boundary conditions between the permanent magnets each having a rectangular parallelepiped shape and the first permanent magnets, and a yoke for holding the pair of permanent magnets each having a rectangular parallelepiped shape, the plurality of first permanent magnets, and the plurality of second permanent magnets and for forming a magnetic path.
摘要翻译： 一种用于磁共振成像装置的静磁场发生器，包括一对永久磁铁，每个永磁体具有垂直于均匀磁场的方向布置的长方体形状，以围绕产生均匀磁场的空间;多个第一永磁体 每个具有三角棱镜形状，其布置在每个具有长方体形状的永磁体之间的区域的两侧上;多个第二永磁体，每个具有三角形形状，每个具有三角形形状，每个具有长方体形状的永磁体和 所述第一永久磁铁满足各自具有长方体形状的永久磁铁和所述第一永久磁铁之间的磁场边界条件，以及用于保持所述一对永久磁铁的磁轭，所述磁轭各自具有长方体形状，所述多个第一永久磁铁， 和多个 第二永磁体和用于形成磁路。
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公开(公告)号：US07755359B2
公开(公告)日：2010-07-13
申请号：US11628097
申请日：2005-05-25
IPC分类号： G01V3/00
CPC分类号： G01R33/3873 , A61B5/055 , G01R33/3806 , G01R33/3815 , G01R33/3854
摘要： A magnetic resonance imaging apparatus capable of suppressing noise caused by vibration of a gradient magnetic field coil and improving image quality includes a large number of ferromagnetic shims disposed in a large number of holes formed in a shim tray, and vibration dampers disposed in holes formed in the shim tray to reduce noise generated by vibration of a gradient magnetic field generating coil.
摘要翻译： 能够抑制由梯度磁场线圈的振动引起的噪声并提高图像质量的磁共振成像装置包括大量设置在形成于垫片托盘中的大量孔中的铁磁垫片，以及设置在形成于 垫片托盘，以减少由梯度磁场产生线圈的振动产生的噪音。
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公开(公告)号：US20080309343A1
公开(公告)日：2008-12-18
申请号：US11628097
申请日：2005-05-25
IPC分类号： G01R33/3873
CPC分类号： G01R33/3873 , A61B5/055 , G01R33/3806 , G01R33/3815 , G01R33/3854
摘要： A magnetic resonance imaging apparatus capable of suppressing noise caused by vibration of a gradient magnetic field coil and improving image quality is realized.A shim tray 22 is disposed between a static magnetic field generating magnet 4 and a gradient magnetic field generating coil 13. A large number of ferromagnetic shims are disposed in a large number of holes (screw holes) 24 formed in the shim tray 22. Vibration dampers 23 are disposed in holes formed in the shim tray 22 to reduce noise generated by vibration of the gradient magnetic field generating coil 13, which is propagated to the static magnetic field generating magnet through solid bodies and shakes the static magnetic field generating magnet, etc. It is hence possible to secure areas for arrangement of two means, i.e., static magnetic-field non-uniformity correcting means and vibration suppressing means, to reduce the noise caused by the vibration of the gradient magnetic field generating coil 13, and to suppress deterioration of image quality.
摘要翻译： 实现了能够抑制由梯度磁场线圈的振动引起的噪声并提高图像质量的磁共振成像装置。 垫片托盘22设置在静磁场产生磁体4和梯度磁场产生线圈13之间。大量铁磁垫片设置在形成在垫片托盘22中的大量孔（螺孔）24中。振动 减振器23设置在形成在垫片托盘22中的孔中，以减少由倾斜磁场产生线圈13的振动产生的噪声，该噪声通过固体传播到静态磁场产生磁体并摇动静磁场产生磁体等 因此，可以确保用于布置两个装置的区域，即静态磁场不均匀性校正装置和振动抑制装置，以减少由倾斜磁场产生线圈13的振动引起的噪声，并且抑制 图像质量恶化。
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公开(公告)号：US5621324A
公开(公告)日：1997-04-15
申请号：US146191
申请日：1994-01-18
申请人： Kimiharu Ota , Masaaki Aoki , Hiroyuki Takeuchi , Yasuhiro Marukawa , Hirotaka Takeshima , Chikako Nakamura
发明人： Kimiharu Ota , Masaaki Aoki , Hiroyuki Takeuchi , Yasuhiro Marukawa , Hirotaka Takeshima , Chikako Nakamura
IPC分类号： A61B5/055 , G01R33/383 , H01F7/02 , G01V3/00
CPC分类号： H01F7/0278 , A61B5/055 , G01R33/383
摘要： A magnet field generating apparatus for MRI, comprising:a plurality of permanent magnet assemblies disposed continuously around the angular inner circumference of a hexagonal tubular yoke to provide a uniform magnetic field at the center portion of the hollow space inside said permanent magnet assemblies; the permanent magnet assemblies forming a main magnetic field by a pair of oppositely disposed permanent magnet assemblies which are trapezoidal or square in cross-section; other pairs of permanent magnet assemblies having a triangular or square cross-section; each of the pairs of oppositely disposed permanent magnet assemblies has a side surface in contact with a part of the inner peripheral surface of the yoke and forms a plurality of permanent magnet blocks which are magnetized perpendicularly to the side surface in contact with the yoke so that the permanent magnet assemblies are magnetized perpendicularly to the side surface thereof in contact with the yoke; magnetic pole pieces disposed on each surface of the pair of oppositely disposed permanent magnet assemblies; and permanent magnet piece projections having the same magnetizing direction as the plurality of permanent magnet assemblies are respectively disposed on each surface of the paired oppositely disposed permanent magnet assemblies on which no magnetic pole piece is disposed.
摘要翻译： PCT No.PCT / JP93 / 00320 Sec。 371日期1994年1月18日 102（e）日期1994年1月18日PCT 1993年3月17日PCT公布。 公开号WO93 / 18707 日期：1993年9月30日磁共振成像磁场产生装置，包括：多个永磁体组件，其围绕六边形管状磁轭的角内圆周连续设置，以在所述永磁体内部的中空空间的中心部分提供均匀的磁场 磁铁组件 所述永磁体组件通过一对相对设置的永磁体组件形成主磁场，所述永磁体组件是梯形或正方形的横截面; 其他成对的具有三角形或正方形横截面的永磁体组件; 每对相对设置的永磁体组件具有与磁轭的内周表面的一部分接触的侧表面，并且形成多个垂直于与磁轭接触的侧表面磁化的永磁体块，使得 永磁体组件被垂直于其与轭的接触的侧表面磁化; 设置在一对相对设置的永磁体组件的每个表面上的磁极片; 并且具有与多个永磁体组件相同的磁化方向的永磁体片突起分别设置在不设置磁极片的成对相对设置的永久磁铁组件的每个表面上。
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公开(公告)号：US07928820B2
公开(公告)日：2011-04-19
申请号：US12358612
申请日：2009-01-23
申请人： Tomoo Chiba , Hiroyuki Watanabe , Hirotaka Takeshima , Shigeki Tounosu , Mitsushi Abe , Hiroyuki Takeuchi
发明人： Tomoo Chiba , Hiroyuki Watanabe , Hirotaka Takeshima , Shigeki Tounosu , Mitsushi Abe , Hiroyuki Takeuchi
CPC分类号： H01F6/04 , G01R33/3804 , G01R33/3806 , G01R33/3815
摘要： In a superconducting magnet, including a vacuum vessel, a coil vessel inside the vacuum vessel, and a superconducting coil inside the coil vessel for generating a magnetic field, has a magnetic member, disposed inside the vacuum vessel, supported with thermal insulation, for compensating the magnetic field; a heat exchange device disposed outside the vacuum vessel for supplying to or absorbing heat from the vacuum vessel; and thermal conducting members thermally connecting the heat exchange device via the vacuum vessel to the magnetic member. An MRI including the superconducting magnet is also disclosed.
摘要翻译： 在包括真空容器的真空容器的超导磁体中，真空容器内部的线圈容器和用于产生磁场的线圈容器内的超导线圈具有设置在真空容器内的热绝缘支撑的磁性构件，用于补偿 磁场; 设置在所述真空容器外部的用于从所述真空容器供给或吸收热量的热交换装置; 以及导热构件，其通过所述真空容器将所述热交换装置热连接到所述磁性构件。 还公开了包括超导磁体的MRI。
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公开(公告)号：US20090189721A1
公开(公告)日：2009-07-30
申请号：US12358612
申请日：2009-01-23
申请人： Tomoo CHIBA , Hiroyuki Watanabe , Hirotaka Takeshima , Shigeki Tounosu , Mitsushi Abe , Hiroyuki Takeuchi
发明人： Tomoo CHIBA , Hiroyuki Watanabe , Hirotaka Takeshima , Shigeki Tounosu , Mitsushi Abe , Hiroyuki Takeuchi
IPC分类号： H01F6/00
CPC分类号： H01F6/04 , G01R33/3804 , G01R33/3806 , G01R33/3815
摘要： In a superconducting magnet, including a vacuum vessel, a coil vessel inside the vacuum vessel, and a superconducting coil inside the coil vessel for generating a magnetic field, has a magnetic member, disposed inside the vacuum vessel, supported with thermal insulation, for compensating the magnetic field; a heat exchange device disposed outside the vacuum vessel for supplying to or absorbing heat from the vacuum vessel; and thermal conducting members thermally connecting the heat exchange device via the vacuum vessel to the magnetic member. An MRI including the superconducting magnet is also disclosed.
摘要翻译： 在包括真空容器的真空容器的超导磁体中，真空容器内部的线圈容器和用于产生磁场的线圈容器内的超导线圈具有设置在真空容器内的热绝缘支撑的磁性构件，用于补偿 磁场; 设置在所述真空容器外部的用于从所述真空容器供给或吸收热量的热交换装置; 以及导热构件，其通过所述真空容器将所述热交换装置热连接到所述磁性构件。 还公开了包括超导磁体的MRI。
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公开(公告)号：US5438264A
公开(公告)日：1995-08-01
申请号：US82977
申请日：1993-06-29
IPC分类号： A61B5/055 , G01R33/38 , G01R33/383 , H01F7/02 , G01V3/00
CPC分类号： H01F7/0278 , G01R33/383
摘要： A magnetic field generating apparatus has a hollow permanent magnet formed of a plurality of permanent magnet elements arranged to have a polygonal section. Magnetization directions of the end portions of the hollow permanent magnet in its longitudinal direction are made different from those of the central portion thereof so that the magnetic field generated in a predetermined region in the hollow space of the permanent magnet is increased as compared with a case where the magnetizations of the hollow permanent magnet are all directed in the same direction.
摘要翻译： 磁场产生装置具有由多个被设置为具有多边形截面的永磁体构成的中空永磁体。 中空永久磁铁的长度方向的端部的磁化方向与其中心部分的磁化方向不同，使得在永磁体的中空空间中的预定区域中产生的磁场与壳体 其中中空永磁体的磁化全部以相同方向指向。
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公开(公告)号：US09684044B2
公开(公告)日：2017-06-20
申请号：US14349424
申请日：2012-10-17
IPC分类号： G01R33/34 , G01R33/3415 , G01R33/345 , G01R33/36
CPC分类号： G01R33/34092 , G01R33/3415 , G01R33/3453 , G01R33/36 , G01R33/365
摘要： In order to provide a technique which can suppress coupling to homogenize the spatial distribution of an RF magnetic field and can improve penetration of the RF magnetic field into the subject, pad-like electric field conductors having a predetermined area are provided outside both ends of a rung conductor as a part of a configuration which forms a loop-like circuit and is driven as an antenna. An antenna device includes a sheet-like conductor, a rung conductor which is arranged at a predetermined distance from the sheet-like conductor, two electric field conductors which are arranged in both end portions of the rung conductor at a predetermined distance from the sheet-like conductor, and connection terminals which are transmission and reception terminals provided in the rung conductor and the sheet-like conductor. The rung conductor and the sheet-like conductor configure a loop circuit which resonates at a preset frequency.
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10.发明授权公开(公告)号：US09453897B2
公开(公告)日：2016-09-27
申请号：US13817680
申请日：2011-08-18
IPC分类号： G01R33/58 , G01R33/389 , G01R33/565 , A61B5/055
CPC分类号： G01R33/58 , A61B5/055 , G01R33/389 , G01R33/56509 , G01R33/56518
摘要： Regardless of the measurement conditions, the degradation of the image quality due to a vibrational error magnetic field, which is generated by the vibration of the mechanical structure of an MRI apparatus, is reduced. In order to do so, error magnetic field image data indicating an error magnetic field distribution is acquired on the basis of an echo signal measured using a pulse sequence having a test gradient magnetic field, a parameter value of a damped vibration function showing a vibrational error magnetic field is calculated using the error magnetic field image data, and a correction magnetic field is calculated on the basis of the calculated parameter value of the damped vibration function showing the vibrational error magnetic field.
摘要翻译： 不管测量条件如何，减少了由MRI装置的机械结构的振动产生的由振动误差磁场引起的图像质量的劣化。 为了这样做，基于使用具有测试梯度磁场的脉冲序列测量的回波信号，获得表示误差磁场分布的误差磁场图像数据，显示振动误差的阻尼振动函数的参数值 使用误差磁场图像数据计算磁场，并且基于计算出的表示振动误差磁场的阻尼振动函数的参数值来计算校正磁场。
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