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    • 41. 发明申请
    • Superconductive magnetic apparatus for magnetic resonance imaging unit
    • 用于磁共振成像单元的超导磁性装置
    • US20080100295A1
    • 2008-05-01
    • US11723749
    • 2007-03-21
    • Takeshi NakayamaMitsushi AbeHiroyuki WatanabeMasanori Takahashi
    • Takeshi NakayamaMitsushi AbeHiroyuki WatanabeMasanori Takahashi
    • G01R33/3815
    • G01R33/3873G01R33/3806G01R33/3815G01R33/421
    • A super-conducting magnet apparatus in an MRI system which may reduce unevenness among magnetization characteristics of ferromagnetic elements arranged between super-conductive shield coils and superconducting main coils. There are provided a pair of super-conducting main coils, a pair of superconductive shield coils arranged on the axes of the pair of super-conducting main coils, being spaced from the pair of super-conducting main coils, and also arranged on opposite sides of a zone to be observed, and ferromagnetic elements arranged in parts of spaces extending from air core parts of the super-conducting main coils to air core parts of the super-conductive shield coils. The super-conductive shield coils have an outer diameter which is larger than that of the super-conducting main coils. The ferromagnetic elements are composed of a plurality of axially symmetric ferromagnetic members which are coaxially arranged, and which have a space in at least a radial part thereof, but not in a center axis part. With this configuration, the magnetic saturation of the ferromagnetic members may be facilitated. Thereby it is possible to reduce the effect of unevenness among magnetization characteristics of the ferromagnetic elements.
    • 一种MRI系统中的超导磁体装置,其可以减少配置在超导体屏蔽线圈与超导主线圈之间的铁磁性元件的磁化特性之间的不均匀性。 设置有一对超导主线圈,一对超导屏蔽线圈,布置在一对超导主线圈的轴线上,与一对超导主线圈间隔开,并且还布置在相对侧 以及配置在从超导主线圈的空气芯部分延伸到超导电屏蔽线圈的空芯部分的空间的部分的铁磁元件。 超导电屏蔽线圈的外径大于超导主线圈的外径。 铁磁元件由同轴布置的多个轴向对称铁磁构件组成,并且在至少其径向部分中具有空间,但不在中心轴部分。 利用这种结构,铁磁部件的磁饱和度可以容易。 由此,能够降低铁磁性元件的磁化特性之间的不均匀性的影响。
    • 43. 发明授权
    • MRI superconductive magnet
    • MRI超导磁体
    • US07323963B2
    • 2008-01-29
    • US11476700
    • 2006-06-29
    • Takeo NemotoRyuya AndoHiroyuki Watanabe
    • Takeo NemotoRyuya AndoHiroyuki Watanabe
    • H01F7/00
    • G01R33/3815G01R33/421
    • An object of the present invention is to provide a MRI superconductive magnet enables sharp images representing patients' health states to be produced.[Means for Achieving the Object]A MRI superconductive magnet having a superconductive coil, a liquid vessel of liquid helium used to cool the superconductive coil, a heat shield to accommodate the liquid vessel therein, a vacuum chamber to accommodate the heat shield therein, a load supporting body for supporting the superconductive coil from the vacuum chamber and securing the superconductive coil, a second cold part of a multi-stage refrigerator for cooling a heat exchanger to condense evaporated helium gas, and a first cold part of the multi-stage refrigerator for cooling the heat shield, wherein a magnetic shield is provided from the first cold part of the multi-stage refrigerator to an outer periphery of the second cold part of the multi-stage refrigerator.
    • 本发明的目的是提供一种MRI超导磁体,其能够产生表示患者健康状态的清晰图像。 实现目标的手段具有超导线圈的MRI超导磁体,用于冷却超导线圈的液氦液体容器,用于容纳液体容器的隔热罩,容纳其中的隔热罩的真空室, 用于从真空室支撑超导线圈并固定超导线圈的负载支撑体,用于冷却热交换器以冷凝蒸发的氦气的多级制冷器的第二冷部,以及多级制冷器的第一冷部 用于冷却隔热罩,其中从多级制冷机的第一冷部向多级制冷机的第二冷部的外周提供磁屏蔽。
    • 45. 发明申请
    • SUPERCONDUCTING MAGNET AND MAGNETIC RESONANCE IMAGING APPARATUS USING THE SAME
    • 超导磁体和磁共振成像装置使用它
    • US20070152789A1
    • 2007-07-05
    • US11617765
    • 2006-12-29
    • Hiroyuki WatanabeJun KawamuraTomoo ChibaMiki YamazakiTeruhiro Takizawa
    • Hiroyuki WatanabeJun KawamuraTomoo ChibaMiki YamazakiTeruhiro Takizawa
    • H01F6/00
    • G01R33/3815G01R33/3806G01R33/421
    • A superconducting magnet includes: first and second torus coolant containers substantially symmetrically, vertically arranged to have a space and a symmetrical plane therebetween for storing a coolant. Each of the first and second torus coolant containers includes therein a main coil bobbin with a main coil for generating a measurement magnetic field, a shield coil bobbin with a shield coil for generating a shielding magnetic field for suppressing outside leak of the measurement magnetic field, a plate member vertically reinforced at a plane thereof opposite to a plane thereof facing the symmetrical plane for supporting the shield coil bobbin and the main coil bobbin. The main coil bobbin is further supported by the shield coil bobbin, to cause the main coil to generate the measurement magnetic field having a substantially uniform magnetic field intensity at a middle region of the space. A magnetic resonance imaging apparatus using the superconducting magnet is also disclosed.
    • 超导磁体包括:第一和第二环形冷却剂容器,基本对称地垂直地布置成在其间具有用于存储冷却剂的空间和对称的平面。 第一和第二环面冷却剂容器中的每一个包括具有用于产生测量磁场的主线圈的主线圈架,具有用于产生用于抑制测量磁场的外部泄漏的屏蔽磁场的屏蔽线圈架的屏蔽线圈架, 在与面对对称平面的平面相对的平面上垂直加强的板构件,用于支撑屏蔽线圈架和主线圈架。 主线圈骨架由屏蔽线圈架线圈进一步支撑,使主线圈产生在该空间的中间区域具有大致均匀的磁场强度的测量磁场。 还公开了使用超导磁体的磁共振成像装置。