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    Moving table MRI with frequency-encoding in the z-direction
    4.
    发明授权
    Moving table MRI with frequency-encoding in the z-direction 有权

    公开(公告)号：US06891374B2

    公开(公告)日：2005-05-10

    申请号：US10749167

    申请日：2003-12-30

    申请人： Jean Helen Brittain

    发明人： Jean Helen Brittain

    IPC分类号： G01R33/30 ,  A61B5/055 ,  G01R33/28 ,  G01R33/54 ,  G01R33/563 ,  G01V3/00

    CPC分类号： G01R33/56383 ,  G01R33/28 ,  G01R33/54 ,  G01R33/56375

    摘要： A system and method are disclosed using continuous table motion while acquiring data to reconstruct MR images across a large FOV without significant slab-boundary artifacts that reduces acquisition time. At each table position, full z-encoding data are acquired for a subset of the transverse k-space data. The table is moved through a number of positions over the desired FOV and MR data are acquired over the plurality of table positions. Since full z-data are acquired for each slab, the data can be Fourier transformed in z, interpolated, sorted, and aligned to match anatomic z locations. The fully sampled and aligned data is then Fourier transformed in remaining dimension(s) to reconstruct the final image that is free of slab-boundary artifacts.

    Moving table MRI with frequency-encoding in the z-direction
    5.
    发明授权
    Moving table MRI with frequency-encoding in the z-direction 有权

    公开(公告)号：US06794869B2

    公开(公告)日：2004-09-21

    申请号：US09682699

    申请日：2001-10-05

    申请人： Jean Helen Brittain

    发明人： Jean Helen Brittain

    IPC分类号： G01V300

    CPC分类号： G01R33/56383 ,  G01R33/28 ,  G01R33/54 ,  G01R33/56375

    摘要： A system and method are disclosed using continuous table motion while acquiring data to reconstruct MR images across a large FOV without significant slab-boundary artifacts that reduces acquisition time. At each table position, full z-encoding data are acquired for a subset of the transverse k-space data. The table is moved through a number of positions over the desired FOV and MR data are acquired over the plurality of table positions. Since full z-data are acquired for each slab, the data can be Fourier transformed in z, interpolated, sorted, and aligned to match anatomic z locations. The fully sampled and aligned data is then Fourier transformed in remaining dimension(s) to reconstruct the final image that is free of slab-boundary artifacts.

    Systems and methods for phase encode placement
    7.
    发明授权
    Systems and methods for phase encode placement 有权
    用于相位编码放置的系统和方法

    公开(公告)号：US08326399B2

    公开(公告)日：2012-12-04

    申请号：US12576917

    申请日：2009-10-09

    申请人： David Henry Gurr ,  Jean Helen Brittain ,  Graham Arnold Wright

    发明人： David Henry Gurr ,  Jean Helen Brittain ,  Graham Arnold Wright

    IPC分类号： A61B5/05

    CPC分类号： G01R33/54

    摘要： A method for a medical examination is provided. The method includes acquiring at least two datasets that include data acquired at a plurality of points that lie along at least two lines through a center of k-space, reconstructing the at least two datasets to generate an image, and outputting the image.

    摘要翻译： 提供了一种用于体格检查的方法。 所述方法包括获取至少两个数据集，所述至少两个数据集包括通过k空间的中心沿着至少两条线位于多个点处获取的数据，重建所述至少两个数据集以生成图像，以及输出图像。

    Method and apparatus of acquiring large FOV images without slab-boundary artifacts
    8.
    发明授权
    Method and apparatus of acquiring large FOV images without slab-boundary artifacts 有权
    获取大型FOV图像而不具有平板边界伪影的方法和装置

    公开(公告)号：US06801034B2

    公开(公告)日：2004-10-05

    申请号：US09681420

    申请日：2001-03-30

    申请人： Jean Helen Brittain ,  John Mark Pauly

    发明人： Jean Helen Brittain ,  John Mark Pauly

    IPC分类号： G01V300

    CPC分类号： G01R33/28 ,  G01R33/54 ,  G01R33/56375

    摘要： A system and method are disclosed using incremental table motion and partial data acquisition for increased volume coverage to reconstruct MR images across a large FOV without significant slab-boundary artifacts. At each table position, full z-encoding data are acquired for a subset of the kx-ky data. The table is stepped through a number of positions over the desired FOV and MR data are acquired over the plurality of table increments. Since full z-data are acquired for each slab, the data can be Fourier transformed in z, sorted, and then aligned to match anatomic z locations. The fully sampled and aligned data is then Fourier transformed in x and y to reconstruct the final image that is free of slab-boundary artifacts.

    摘要翻译： 公开了一种使用增量表运动和部分数据采集来增加体积覆盖的系统和方法，以重建大面积FOV的MR图像，而不会产生明显的平板边界伪像。 在每个表位置，针对kx-ky数据的子集获取完整的z编码数据。 通过所需的FOV跨越多个位置来表，并且通过多个表增量获取MR数据。 由于为每个平板获取完整的z数据，所以数据可以在z进行傅立叶变换，排序，然后对齐以匹配解剖z位置。 完全采样和对齐的数据然后在x和y中进行傅里叶变换，以重建没有平板边界伪影的最终图像。

    Method and apparatus of slice selective magnetization preparation for moving table MRI
    10.
    发明授权
    Method and apparatus of slice selective magnetization preparation for moving table MRI 有权
    用于移动台MRI的切片选择性磁化准备的方法和装置

    公开(公告)号：US07411397B2

    公开(公告)日：2008-08-12

    申请号：US11669090

    申请日：2007-01-30

    申请人： Ajit Shankaranarayanan ,  Jean Helen Brittain

    发明人： Ajit Shankaranarayanan ,  Jean Helen Brittain

    IPC分类号： G01V3/00

    CPC分类号： A61B5/055 ,  G01R33/56375

    摘要： The present invention is directed to slice selective magnetization preparation for moving table MRI. The present invention includes a method of magnetization preparation that takes into account patient movement or translation during the imaging process. The present invention adjusts or modifies the frequency at which magnetization preparation pulses are applied to offset the preparation pulse in space. This allows preparation pulses to be interleaved with imaging and enables magnetization preparation without sacrificing other imaging variables or parameters defined for the particular MR study. As such, contrast within a reconstructed image is improved.

    摘要翻译： 本发明涉及用于移动台MRI的切片选择性磁化准备。 本发明包括在成像过程中考虑患者移动或平移的磁化准备方法。 本发明调整或修改施加磁化准备脉冲以偏移空间中的准备脉冲的频率。 这允许准备脉冲与成像交错并且使得磁化准备不会牺牲为特定MR研究定义的其它成像变量或参数。 因此，改善了重建图像内的对比度。