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    • 53. 发明申请
    • NMR analyzer
    • NMR分析仪
    • US20050122112A1
    • 2005-06-09
    • US11025915
    • 2005-01-03
    • Katsuzou AiharaMichiya OkadaShigeru KakugawaHiroshi MoritaTsuyoshi Wakuda
    • Katsuzou AiharaMichiya OkadaShigeru KakugawaHiroshi MoritaTsuyoshi Wakuda
    • G01R33/32G01R33/345G01R33/3815G01R33/3875G01V3/00
    • G01R33/34046G01R33/34053G01R33/3806G01R33/3815G01R33/44G01R33/4808
    • A first room-temperature space is formed penetrating through a cryostat along a center axis of a split-type multi-layer cylindrical superconducting coil system which has a ratio of the maximum empirical magnetic field to the central magnetic filed of not larger than 1.3 and is horizontally arranged such that the center axis of the coil is in the horizontal direction, a room-temperature shim coil system is arranged in said first room-temperature space to improve the homogeneity of the magnetic field, a second room-temperature space is formed penetrating through the cryostat and passing through the center of said split gap in the vertical direction, and a sample to be measured and an NMR probe having a solenoid-type probe coil are inserted in said second room-temperature space. Further, the NMR analyzer has a new function constituted by a system for irradiating and detecting the electromagnetic waves having wavelengths of shorter than 0.1 mm.
    • 第一室温空间形成为沿分离型多层圆柱形超导线圈系统的中心轴穿过低温恒温器,该分离型多层圆柱形超导线圈系统的最大经验磁场与中心磁场的比值不大于1.3, 水平排列为使得线圈的中心轴线处于水平方向,在所述第一室温空间内布置室温垫片线圈系统,以改善磁场的均匀性,形成第二室温空间 通过低温恒温器并沿着垂直方向穿过所述分割间隙的中心,并且将待测量样品和具有螺线管型探针线圈的NMR探针插入所述第二室温空间中。 此外,NMR分析仪具有由用于照射和检测波长小于0.1mm的电磁波的系统构成的新功能。
    • 54. 发明授权
    • NMR analyzer
    • NMR分析仪
    • US06859036B2
    • 2005-02-22
    • US10315215
    • 2002-12-10
    • Katsuzou AiharaMichiya OkadaShigeru KakugawaHiroshi MoritaTsuyoshi Wakuda
    • Katsuzou AiharaMichiya OkadaShigeru KakugawaHiroshi MoritaTsuyoshi Wakuda
    • G01R33/32G01R33/345G01R33/3815G01R33/3875G01V3/00
    • G01R33/34046G01R33/34053G01R33/3806G01R33/3815G01R33/44G01R33/4808
    • A first room-temperature space is formed penetrating through a cryostat along a center axis of a split-type multi-layer cylindrical superconducting coil system which has a ratio of the maximum empirical magnetic field to the central magnetic field of not larger than 1.3 and is horizontally arranged such that the center axis of the coil is in the horizontal direction, a room-temperature shim coil system is arranged in said first room-temperature space to improve the homogeneity of the magnetic field, a second room-temperature space is formed penetrating through the cryostat and passing through the center of said split gap in the vertical direction, and a sample to be measured and an NMR probe having a solenoid-type probe coil are inserted in said second room-temperature space. Further, the NMR analyzer has a new function constituted by a system for irradiating and detecting the electromagnetic waves having wavelengths of shorter than 0.1 mm.
    • 第一室温空间形成为沿着分离式多层圆柱形超导线圈系统的中心轴穿过低温恒温器,其具有最大经验磁场与中心磁场的比例不大于1.3,并且是 水平排列为使得线圈的中心轴线处于水平方向,在所述第一室温空间内布置室温垫片线圈系统,以改善磁场的均匀性,形成第二室温空间 通过低温恒温器并沿着垂直方向穿过所述分割间隙的中心,并且将待测量样品和具有螺线管型探针线圈的NMR探针插入所述第二室温空间中。 此外,NMR分析仪具有由用于照射和检测波长小于0.1mm的电磁波的系统构成的新功能。
    • 55. 发明授权
    • Magnetic resonance imaging apparatus
    • 磁共振成像装置
    • US06816047B2
    • 2004-11-09
    • US10391284
    • 2003-03-18
    • Hirotaka TakeshimaHajime KawanoShigeru KakugawaNoriaki Hino
    • Hirotaka TakeshimaHajime KawanoShigeru KakugawaNoriaki Hino
    • H01F600
    • G01R33/3875G01R33/3806G01R33/3815G01R33/421
    • The present invention relates to techniques for enlarging an opening, which accommodates a subject, in a superconducting magnet apparatus for use in MRI system, so as to prevent the subject from feeling claustrophobic, and for realizing low magnetic field leakage therefrom, and for reducing the weight thereof, and for realizing a large high magnetic field strength uniform magnetic field region. Static magnetic field generating sources of the superconducting magnet apparatus are constituted by two sets of superconducting coils, the respective sets of which are placed in such a manner as to face each other across a uniform magnetic field generating region. Each of the sets of superconducting coils consists of a main coil for feeding electric current in a specific direction, a bucking coil for feeding electric current in a direction opposite to the direction of the electric current flow passing through the main coil, and a coil for correcting magnetic homogeneity. The diameter of the aforementioned main coil is set as being nearly equal to that of the aforesaid bucking coil. Further, the diameter of the coil for correcting the magnetic homogeneity is set as being less than that of the main coil. Moreover, an amount of electric current flowing through the coil for correcting the magnetic homogeneity is set as being less than that of electric current passing through the main coil. Furthermore, the distance between the two main coils facing each other is set as being shorter than that between the two bucking coils.
    • 56. 发明授权
    • Superconducting magnet apparatus and magnetic resonance imaging system
using the same
    • 超导磁体装置及使用其的磁共振成像系统
    • US5936498A
    • 1999-08-10
    • US913062
    • 1997-09-05
    • Hirotaka TakeshimaHajime KawanoShigeru Kakugawa
    • Hirotaka TakeshimaHajime KawanoShigeru Kakugawa
    • A61B5/055G01R33/38G01R33/3815G01R33/3873G01R33/421H01F6/00H01F7/20H01F1/00
    • G01R33/421G01R33/3806H01F6/00G01R33/3815G01R33/3873
    • In a superconducting magnet apparatus for use in a magnetic resonance imaging system, an opening for accommodating a subject is enlarged, so that the subject is prevented from feeling claustrophobic, that an operator easily gets access to the subject, that low magnetic field leakage therefrom is realized, and that the manufacturing cost thereof can be reduced. In the superconducting magnet apparatus provided with two sets of superconducting coils placed across a uniform magnetic field region at an equal distance therefrom in such a manner as to face each other, disk-like ferromagnetic substances and cylindrical ferromagnetic substances are disposed around the superconducting coils. Further, a plurality of column-like ferromagnetic substances are interposed between the cylindrical ferromagnetic substances facing each other. Thus, a return path for external magnetic flux generated by the superconducting magnet coils is constituted. Consequently, the opening for accommodating a subject is enlarged, so that subjects can be prevented from feeling claustrophobic, that an operator can easily gets access to the subject, that low magnetic field leakage therefrom can be realized, and that the manufacturing cost thereof can be reduced.
    • PCT No.PCT / JP97 / 00039 Sec。 371日期:1997年9月5日 102(e)1997年9月5日PCT PCT 1997年1月10日PCT公布。 公开号WO97 / 25726 日期1997年7月17日在用于磁共振成像系统的超导磁体装置中,扩大了用于容纳被摄体的开口,从而防止受试者感到幽闭恐惧,操作者容易获得对象的接近,低 实现了磁场的泄漏,可以降低其制造成本。 在设置有两组超导线圈的超导磁体设备中,以彼此相对的方式设置在与其相等的距离处的均匀磁场区域的两组超导线圈中,盘状铁磁物质和圆柱形铁磁物质围绕超导线圈设置。 此外,在彼此面对的圆柱形铁磁物质之间插入多个柱状铁磁物质。 因此,构成由超导磁体线圈产生的外部磁通的返回路径。 因此,用于容纳被摄体的开口被扩大,从而可以防止受试者感到幽闭恐惧,操作者可以容易地进入对象,可以实现低磁场泄漏,并且其制造成本可以是 减少