Magnetic resonance imaging scanner with molded fixed shims
    1.
    发明申请
    Magnetic resonance imaging scanner with molded fixed shims 有权
    具有模制固定垫片的磁共振成像扫描仪

    公开(公告)号:US20070030004A1

    公开(公告)日:2007-02-08

    申请号:US10558768

    申请日:2004-05-19

    IPC分类号: G01V3/00

    CPC分类号: G01R33/3873

    摘要: A magnetic resonance imaging scanner includes a generally cylindrical main magnet assembly (10) that defines a cylinder axis (16). A first set of shims (60) are rigidly positioned inside the magnet assembly (10) at about a first distance (d1) relative to the cylinder axis (16). A second set of shims (62) are rigidly positioned inside the main magnet assembly (10) at about a second distance (d2) relative to the cylinder axis (16). The second distance (d2) is different from the first distance (d1). A generally cylindrical radio frequency coil (26) is arranged inside the main magnet assembly (10) at about a third distance (d3) relative to the cylinder axis (16). A plurality of gradient coils (20) are arranged inside the main magnet assembly (10) at about a fourth distance (d4) relative to the cylinder axis (16).

    摘要翻译: 磁共振成像扫描仪包括限定气缸轴线(16)的大致圆柱形的主磁体组件(10)。 第一组垫片(60)相对于气缸轴线(16)以大约第一距离(d 1)刚性地定位在磁体组件(10)的内部。 第二组垫片(62)相对于气缸轴线(16)以大约第二距离(d 2)刚性地定位在主磁体组件(10)的内部。 第二距离(d 2)与第一距离(d 1)不同。 大致圆柱形的射频线圈(26)相对于气缸轴线(16)以大约第三距离(d 3)布置在主磁体组件(10)的内部。 多个梯度线圈(20)相对于气缸轴线(16)以大约第四距离(d 4)布置在主磁体组件(10)的内部。

    Table position sensing for magnetic resonance imaging
    2.
    发明申请
    Table position sensing for magnetic resonance imaging 有权
    用于磁共振成像的表位置检测

    公开(公告)号:US20060142655A1

    公开(公告)日:2006-06-29

    申请号:US10560695

    申请日:2004-06-01

    IPC分类号: A61B5/05

    摘要: An MRI apparatus is provided. The MRI apparatus includes a main magnet (12) for generating a main magnetic field in an examination region, a plurality of gradient magnets (16) for generating magnetic field gradients in the main magnetic field, a radio frequency coil (22) for transmitting radio frequency signals into the examination region and exciting magnetic resonance in a subject disposed therein, and a radio frequency coil for receiving the magnetic resonance signals from the subject. The MRI apparatus also includes subject support (52) for supporting the subject, a position controller (60) for controlling the position of the subject support within the examination region, and a position encoder (53) for directly measuring the position of the subject support.

    摘要翻译: 提供MRI装置。 MRI装置包括用于在检查区域中产生主磁场的主磁体(12),用于在主磁场中产生磁场梯度的多个梯度磁体(16),用于发射无线电的射频线圈 频率信号进入检查区域并激励被设置在其中的被摄体的磁共振,以及射频线圈,用于接收来自被检体的磁共振信号。 MRI装置还包括用于支撑被检体的被检体支架(52),用于控制检查区域内的被检体的位置的位置控制器(60),以及用于直接测量被检体支架 。