Magnetic resonance imaging scanner with molded fixed shims
    1.
    发明授权
    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:US07495441B2

    公开(公告)日:2009-02-24

    申请号:US10558768

    申请日:2004-04-19

    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(d1)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(d2)刚性地定位在主磁体组件(10)的内部。 第二距离(d2)与第一距离(d1)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(d3)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(d4)布置在主磁体组件(10)的内部。