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    Magnetic Resonance Imaging Apparatus
    2.
    发明申请
    Magnetic Resonance Imaging Apparatus 失效
    磁共振成像仪

    公开(公告)号：US20080309343A1

    公开(公告)日：2008-12-18

    申请号：US11628097

    申请日：2005-05-25

    申请人： Takashi Yamamizu ,  Shichihei Sakuragi ,  Hirotaka Takeshima ,  Hiroyuki Takeuchi

    发明人： Takashi Yamamizu ,  Shichihei Sakuragi ,  Hirotaka Takeshima ,  Hiroyuki Takeuchi

    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。