Method and system of determining in-plane motion in propeller data
    1.
    发明授权
    Method and system of determining in-plane motion in propeller data 有权
    确定螺旋桨数据中的平面内运动的方法和系统

    公开(公告)号:US07176684B2

    公开(公告)日:2007-02-13

    申请号:US11170054

    申请日:2005-06-29

    IPC分类号: G01V3/00

    CPC分类号: G01R33/561

    摘要: The present invention is directed to a method of MR imaging whereby a k-space blade extending through a center of k-space from a subject in motion is acquired. A high-pass convolution of the k-space blade with a reference k-space blade is then determined and converted to a δ function. In-plane motion of the subject during data acquisition of the k-space is then determined from the δ function.

    摘要翻译: 本发明涉及一种MR成像方法,其中获取从运动中的被摄体延伸穿过k空间的中心的k空间刀片。 然后确定k空间刀片与参考k空间刀片的高通卷积并转换为增量函数。 然后,从delta函数确定在k空间的数据采集期间的对象的平面内运动。

    Multiplexed echo trains in nuclear magnetic resonance
    2.
    发明授权
    Multiplexed echo trains in nuclear magnetic resonance 失效
    核磁共振中多路回波列车

    公开(公告)号:US5327088A

    公开(公告)日:1994-07-05

    申请号:US924645

    申请日:1992-07-31

    申请人: James G. Pipe

    发明人: James G. Pipe

    IPC分类号: G01R33/561 G01V3/00

    CPC分类号: G01R33/561

    摘要: A nuclear magnetic resonance (NMR) technique for producing multiplexed NMR echo trains. The present invention results in the placement of discrete copies of the original spin-echo in a line along k-space. Utilizing a conventional NMR apparatus, a longitudinal magnetic field is first generated. Next a train of NMR spin-echoes is created by imprinting a repetitive pattern on the longitudinal magnetization. This pattern is composed of a sum of complex exponentials. The spins are then evolved and observed in an uninterrupted readout period. The result is an NMR pulse sequence (10) which splits the spin-echo into a series of spin-echoes thereby permitting the sampling of k-space in a single data acquisition. In the preferred embodiment, the multiplexed echo train technique of the present invention is applied to single-shot magnetic residence imaging (MRI) to permit rapid collection of data, fast screening, and two or three-dimensional imaging in clinically practical times.

    摘要翻译: 用于生产多重核磁共振回波列的核磁共振(NMR)技术。 本发明导致将原始自旋回波的离散拷贝放置在沿k空间的一行中。 利用常规NMR装置,首先产生纵向磁场。 接下来,通过在纵向磁化上记录重复图案来产生一系列NMR自旋回波。 该模式由复数指数的总和组成。 然后自旋进化并在不间断的读出期间观察。 结果是NMR脉冲序列(10),其将自旋回波分裂成一系列自旋回波,从而允许在单个数据采集中对k空间进行采样。 在优选实施例中,将本发明的多路复用回波列车技术应用于单次静态成像(MRI),以允许在临床实际时间内快速收集数据,快速筛选和二维或三维成像。

    Split-blade data collection for propeller MRI
    3.
    发明授权
    Split-blade data collection for propeller MRI 失效
    螺旋桨MRI分割刀片数据采集

    公开(公告)号:US07030609B2

    公开(公告)日:2006-04-18

    申请号:US11052716

    申请日:2005-01-26

    申请人: James G. Pipe

    发明人: James G. Pipe

    IPC分类号: G01V3/00

    CPC分类号: G01R33/56341 G01R33/561

    摘要: The present invention provides a system and method of MR imaging particularly applicable with fast spin echo protocols. Odd and even echoes are used to create separate blades or strips in k-space. Preferably, each blade extends through the center of k-space. The blades are incrementally rotated about the center of k-space with each echo train until a full set of k-space data is acquired. After a phase correction, each odd and even blade is combined into a single k-space data set that is used for image reconstruction.

    摘要翻译: 本发明提供了一种特别适用于快速自旋回波协议的MR成像系统和方法。 奇数和偶数回波用于在k空间中创建单独的刀片或条带。 优选地,每个叶片延伸穿过k空间的中心。 使用每个回波列,刀片以k空间的中心逐渐地旋转,直到获取完整的k空间数据集。 在相位校正之后,将每个奇数和偶数叶片组合成用于图像重构的单个k空间数据集。

    Split-blade data collection for propeller MRI
    4.
    发明授权
    Split-blade data collection for propeller MRI 失效
    螺旋桨MRI分割刀片数据采集

    公开(公告)号:US06882148B2

    公开(公告)日:2005-04-19

    申请号:US10604597

    申请日:2003-08-01

    申请人: James G. Pipe

    发明人: James G. Pipe

    CPC分类号: G01R33/56341 G01R33/561

    摘要: The present invention provides a system and method of MR imaging particularly applicable with fast spin echo protocols. Odd and even echoes are used to create separate blades or strips in k-space. Preferably, each blade extends through the center of k-space. The blades are incrementally rotated about the center of k-space with each echo train until a full set of k-space data is acquired. After a phase correction, each odd and even blade is combined into a single k-space data set that is used for image reconstruction.

    摘要翻译: 本发明提供了一种特别适用于快速自旋回波协议的MR成像系统和方法。 奇数和偶数回波用于在k空间中创建单独的刀片或条带。 优选地,每个叶片延伸穿过k空间的中心。 使用每个回波列,刀片以k空间的中心逐渐地旋转,直到获取完整的k空间数据集。 在相位校正之后,将每个奇数和偶数叶片组合成用于图像重构的单个k空间数据集。

    Method and system of quantitatively assessing diffusion characteristics in a tissue
    5.
    发明授权
    Method and system of quantitatively assessing diffusion characteristics in a tissue 有权
    定量评估组织中扩散特征的方法和系统

    公开(公告)号:US06853189B1

    公开(公告)日:2005-02-08

    申请号:US10673865

    申请日:2003-09-29

    申请人: James G. Pipe

    发明人: James G. Pipe

    IPC分类号: G01R33/563 G01V3/00

    CPC分类号: G01R33/56341

    摘要: A process and system to implement such a process is configured to determine diffusion properties within a region-of-interest. A metric or index of diffusion is determined from individual diffusion values corresponding to diffusion along, multiple diffusion directions relative to average diffusion at a related voxel or pair of voxels. The invention may be implemented to determine shared diffusion anisotropy between two voxels. Based on a value of a diffusion index or metric, the present invention provides an efficient and tensor-free technique of determining if diffusion in neighboring voxels is anisotropic and if the diffusion is oriented in the same direction within each voxel. The present invention may be used to rapidly determine fractional anisotropy in a single voxel or used to filter diffusion weighted imaging data. The present invention may also be used to color-code diffusion data such that diffusion and tract orientation are readily identifiable in a reconstructed image.

    摘要翻译: 用于实现这种过程的过程和系统被配置为确定感兴趣区域内的扩散性质。 扩散的度量或指数由对应于相对于相关体素或体素对上的平均扩散沿着多个扩散方向的扩散的单个扩散值确定。 可以实现本发明以确定两个体素之间的共享扩散各向异性。 基于扩散指数或度量的值,本发明提供了一种有效和无张力的技术,用于确定相邻体素中的扩散是否是各向异性的,以及如果扩散在每个体素内沿相同方向定向。 本发明可用于快速确定单个体素中的分数各向异性或用于过滤扩散加权成像数据。 本发明还可以用于对扩散数据进行颜色编码,使得扩散和管道取向在重建图像中容易识别。