Shimming of MRI scanner involving fat suppression and/or black blood preparation
    1.
    发明授权
    Shimming of MRI scanner involving fat suppression and/or black blood preparation 失效
    涉及脂肪抑制和/或黑血液制备的MRI扫描仪的匀场

    公开(公告)号:US07235971B2

    公开(公告)日:2007-06-26

    申请号:US10564048

    申请日:2004-07-07

    IPC分类号: G01V3/00

    CPC分类号: G01R33/3875

    摘要: In a method for shimming a magnetic resonance imaging scanner (10), at least one of fat suppression and blood suppression is performed to suppress magnetic resonance from a corresponding at least one of fat and blood. First and second magnetic resonance echoes emanating from a generally columnar volume are measured. The measurements of the first and second magnetic resonance echoes (122, 124) are reconstructed (150) into corresponding first and second generally columnar projection images (152, 154). The first and second generally columnar projection images are combined (160) to produce a magnetic field profile (174) of the generally columnar volume. Selected magnetic field parameters are extracted (142) from the magnetic field profile. Shim currents are computed (180) from the selected magnetic field parameters. The shim currents are applied to magnetic field coils (16, 60).

    摘要翻译: 在用于对磁共振成像扫描仪(10)进行匀场的方法中,进行脂肪抑制和血液抑制中的至少一种以抑制来自相应的脂肪和血液中的至少一种的磁共振。 测量从大体积柱体积发出的第一和第二磁共振回波。 第一和第二磁共振回波(122,124)的测量被重建(150)到对应的第一和第二大体柱形投影图像(152,154)中。 第一和第二大体上柱状投影图像被组合(160)以产生大体积柱体积的磁场分布(174)。 选择的磁场参数从磁场分布提取(142)。 从选定的磁场参数计算(180)Shim电流。 垫片电流施加到磁场线圈(16,60)。