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    Magnet apparatus and mri apparatus
    2.
    发明授权
    Magnet apparatus and mri apparatus 失效
    磁铁设备和仪器

    公开(公告)号：US06853281B1

    公开(公告)日：2005-02-08

    申请号：US09554155

    申请日：1998-12-01

    申请人： Shigeru Kakugawa ,  Shouji Kitamura ,  Nobuhiro Hara ,  Akiyoshi Komura ,  Noriaki Hino ,  Hajime Kawano ,  Takao Honmei ,  Hirotaka Takeshima ,  Takeshi Yatsuo ,  Hiroshi Tazaki

    发明人： Shigeru Kakugawa ,  Shouji Kitamura ,  Nobuhiro Hara ,  Akiyoshi Komura ,  Noriaki Hino ,  Hajime Kawano ,  Takao Honmei ,  Hirotaka Takeshima ,  Takeshi Yatsuo ,  Hiroshi Tazaki

    IPC分类号： G01R33/38 ,  G01R33/381 ,  G01R33/3815 ,  G01V3/00

    CPC分类号： G01R33/3806 ,  G01R33/381 ,  G01R33/3815

    摘要： A magnet device includes two sets of static magnetic field generation sources spaced from each other in the vertical direction such that the uniform magnetic field region (patient space) is between then. Each set has concentric current carrying coils to generate a uniform magnetic field in a first direction (the vertical direction). Several such coils are used in each set, disposed such that when a first axis which is parallel to the first (vertical) direction and passes substantially through the centers of the current carrying coils crosses, at a first point, a second axis which is orthogonal to the first axis and is at substantially equal distance from the respective static magnetic field generation sources, the current carrying coils are disposed in such a manner that when geometrical centers of cross sections of the current carrying coils are projected on a first straight line that is in a first plane containing the first axis, the second axis and the first point and passing through the first point, the directions of the currents of the carrying coils at the respective corresponding projections align alternatively in positive and negative directions on the first straight line.

    摘要翻译： 磁体装置包括在垂直方向彼此间隔开的两组静态磁场产生源，使得均匀的磁场区域（患者空间）在之间。 每组具有同心的载流线圈，以在第一方向（垂直方向）上产生均匀的磁场。 在每组中使用若干这样的线圈，这样设置成使得当第一轴线平行于第一（垂直）方向并且基本上穿过载流线圈的中心穿过时，在第一点处与正交的第二轴线交叉 到第一轴线并且距离相应的静态磁场产生源基本上相等的距离，载流线圈以这样的方式设置，使得当载流线圈的横截面的几何中心投影在第一直线上时 在包含第一轴线，第二轴线和第一点并穿过第一点的第一平面中，各个相应突起处的输送线圈的电流方向在第一直线上在正向和负向上交替排列。

    Superconducting magnet apparatus and method of regulating magnetization thereof
    3.
    发明授权
    Superconducting magnet apparatus and method of regulating magnetization thereof 失效
    超导磁体装置及其磁化强度的调节方法

    公开(公告)号：US6037850A

    公开(公告)日：2000-03-14

    申请号：US952722

    申请日：1998-01-16

    申请人： Takao Honmei ,  Hirotaka Takeshima ,  Hajime Kawano ,  Yutaka Takuma ,  Munenori Kotabe ,  Naoki Maki ,  Nobuhiro Hara ,  Shigeru Kakugawa ,  Noriaki Hino

    发明人： Takao Honmei ,  Hirotaka Takeshima ,  Hajime Kawano ,  Yutaka Takuma ,  Munenori Kotabe ,  Naoki Maki ,  Nobuhiro Hara ,  Shigeru Kakugawa ,  Noriaki Hino

    IPC分类号： H01F13/00 ,  G01R33/3815 ,  H01F6/00 ,  H01F1/00

    CPC分类号： H01F6/00 ,  G01R33/3815

    摘要： A small-sized high-precision superconducting magnet apparatus which can prevent an occurrence of the principal factor in generating a quench and can restrain the magnetic flux from varying with time, and a method of regulating the magnetization of such a superconducting magnet apparatus, by which the superconducting magnet apparatus can be uniformly magnetized. Superconducting magnet apparatus of the present invention has: a cooling container; a holding medium for holding a persistent current therein, which is placed in said cooling container and is operative to generate a magnetic flux in a uniform magnetic field region (FOV); static-magnetic-field generating means composed of a plurality of cylinders using superconducting composite plate materials; a cylinder supporting base for holding the plurality of cylinders; and temperature regulating devices (not shown in FIG. 67) embedded in the cylinders, respectively. Magnetization of the static-magnetic-field generating means is performed by induction-magnetizing. Further, the regulation of a magnetization value of the static-magnetic-field generating means is regulated by controlling the temperature of the cylinders by means of the temperature regulating devices.

    摘要翻译： PCT No.PCT / JP97 / 00951 Sec。 371日期1998年1月16日 102（e）日期1998年1月16日PCT 1997年3月21日PCT公布。 出版物WO97 / 35328 日期1997年9月25日一种小型高精度超导磁体装置，其能够防止产生淬火的主要因素的发生并且可以抑制磁通量随时间变化，以及调节这种超导体的磁化的方法 磁铁装置可以使超导磁体装置均匀地磁化。 本发明的超导磁体装置具有：冷却容器; 用于保持持久电流的保持介质，其被放置在所述冷却容器中并且可操作以在均匀的磁场区域（FOV）中产生磁通量; 使用超导复合板材料的多个气缸构成的静磁场产生装置; 用于保持多个气缸的气缸支撑基座; 和分别嵌入在气缸中的温度调节装置（图67中未示出）。 通过感应磁化来进行静磁场产生装置的磁化。 此外，通过温度调节装置控制气缸的温度来调节静磁场产生装置的磁化值的调节。

    Low-leakage magnetic-field magnet and shield coil assembly
    4.
    发明授权
    Low-leakage magnetic-field magnet and shield coil assembly 失效
    低泄漏磁场磁体和屏蔽线圈组件

    公开(公告)号：US06909348B2

    公开(公告)日：2005-06-21

    申请号：US10433428

    申请日：2001-12-04

    申请人： Shigeru Kakugawa ,  Katsunori Azuma ,  Tsuyoshi Wakuda ,  Yoshihide Wadayama ,  Hirotaka Takeshima ,  Kenji Sakakibara ,  Takeshi Yatsuo ,  Takao Honmei

    发明人： Shigeru Kakugawa ,  Katsunori Azuma ,  Tsuyoshi Wakuda ,  Yoshihide Wadayama ,  Hirotaka Takeshima ,  Kenji Sakakibara ,  Takeshi Yatsuo ,  Takao Honmei

    IPC分类号： G01R33/38 ,  G01R33/3815 ,  G01R33/421 ,  H01F7/00

    CPC分类号： G01R33/421 ,  G01R33/3806 ,  G01R33/3815

    摘要： A magnet device provided with a shield current carrying means in which two sets of magneto-static field generating sources for generating magnetic fields directed towards a first direction are disposed facing each other across a finite region and at least one set of the magneto-static field generating sources are disclosed on at least two almost concentric circles. A first plane includes a first axis, a second axis and a first point. The first point is a point of insertion between the first axis parallel to the first direction and passing almost through the center of the shield current carrying means. The second axis crosses at right angles to the first axis and is spaced almost equal distance from the two sets of the generating sources. The alternately arranged positive and negative current carrying directions of the shield current carrying means are set in the order of increasing value of θn.

    摘要翻译： 一种具有屏蔽电流承载装置的磁体装置，其中用于产生朝向第一方向的磁场的两组磁静电场产生源跨越有限区域并且至少一组磁静态场 在至少两个几乎同心圆上公开发生源。 第一平面包括第一轴，第二轴和第一点。 第一点是在第一轴平行于第一方向并且几乎穿过屏蔽载流装置的中心之间的插入点。 第二轴线与第一轴线成直角交叉，与两组发电源的距离几乎相等。 屏蔽电流承载装置的交替布置的正和负电流承载方向被设置为以该数量增加的顺序。

    Magnetic resonance imaging apparatus having vibration damping means on gradient coil
    9.
    发明授权
    Magnetic resonance imaging apparatus having vibration damping means on gradient coil 失效
    具有梯度线圈上的减震装置的磁共振成像装置

    公开(公告)号：US5345177A

    公开(公告)日：1994-09-06

    申请号：US32665

    申请日：1993-03-17

    申请人： Taichi Sato ,  Yoshiharu Mohri ,  Kihachiro Tanaka ,  Takao Honmei ,  Masayuki Otsuka ,  Masashi Wada

    发明人： Taichi Sato ,  Yoshiharu Mohri ,  Kihachiro Tanaka ,  Takao Honmei ,  Masayuki Otsuka ,  Masashi Wada

    IPC分类号： A61B5/055 ,  G01R33/20 ,  G01R33/385 ,  G01V3/00

    CPC分类号： G01R33/3854

    摘要： A magnetic resonance imaging apparatus includes a magnet for generating a static magnetic field, a gradient coil for generating a gradient magnetic field in a measurement space, and a vibration damping means which includes a container and granular material disposed in the container. The vibration damping means is installed with a supporting bolt between the gradient coil and a supporting means. Since the gradient coil is supported at a constant position without any vibration and deformation, the magnetic resonance imaging apparatus generates an accurate image signal without any acoustic noise.

    摘要翻译： 磁共振成像装置包括用于产生静磁场的磁体，用于在测量空间中产生梯度磁场的梯度线圈，以及包括容器和设置在容器中的颗粒材料的减振装置。 减震装置在梯度线圈和支撑装置之间安装有支撑螺栓。 由于梯度线圈被支撑在恒定位置而没有任何振动和变形，所以磁共振成像装置产生没有任何声学噪声的精确图像信号。