SYSTEMS AND METHODS FOR REGULARIZED RECONSTRUCTIONS IN MRI USING SIDE INFORMATION
    2.
    发明申请
    SYSTEMS AND METHODS FOR REGULARIZED RECONSTRUCTIONS IN MRI USING SIDE INFORMATION 有权
    使用侧面信息的MRI中定期重建的系统和方法

    公开(公告)号:US20130278261A1

    公开(公告)日:2013-10-24

    申请号:US13867885

    申请日:2013-04-22

    IPC分类号: G01R33/56

    CPC分类号: G01R33/5608

    摘要: Systems and methods for magnetic resonance imaging (MRI) using side information for improved reconstruction are disclosed. In one aspect, in accordance with one example embodiment, images obtained using heteronuclei, such as Fluorine-19 (19F), can be reconstructed using one or more methods to provide improved resolution and detail. The system can use anatomical proton MRI scans. The system can use multiple smoothing techniques to improve the signal-to-noise ratio (SNR). The system can also use weighted smoothing using information from anatomical proton MRI scans to improve resolution.

    摘要翻译: 公开了使用侧面信息进行改进重建的磁共振成像(MRI)的系统和方法。 在一个方面,根据一个示例性实施例,可以使用一种或多种方法来重建使用异核的获得的图像,例如氟-19(19F),以提供改进的分辨率和细节。 该系统可以使用解剖质子MRI扫描。 该系统可以使用多种平滑技术来提高信噪比(SNR)。 该系统还可以使用来自解剖质子MRI扫描的信息的加权平滑来提高分辨率。

    Fast automatic linear off-resonance correction method for spiral imaging
    3.
    发明授权
    Fast automatic linear off-resonance correction method for spiral imaging 有权
    用于螺旋成像的快速自动线性非共振校正方法

    公开(公告)号:US07642777B1

    公开(公告)日:2010-01-05

    申请号:US11892261

    申请日:2007-08-21

    IPC分类号: G01V3/00

    摘要: A fast automatic linear off-resonance correction method for MRI data uses a set of widely spaced demodulation frequencies to estimate a low-resolution field map from the image itself. A linear map is determined by fitting to this low-resolution map using a maximum-likelihood estimator with weights proportional to the pixel intensity.

    摘要翻译: 用于MRI数据的快速自动线性非共振校正方法使用一组广泛间隔的解调频率来从图像本身估计低分辨率场地图。 通过使用具有与像素强度成比例的权重的最大似然估计器拟合到该低分辨率图来确定线性映射。

    Rapid method of optimal gradient waveform design for MRI
    4.
    发明授权
    Rapid method of optimal gradient waveform design for MRI 失效
    MRI的最佳梯度波形设计快速方法

    公开(公告)号:US6020739A

    公开(公告)日:2000-02-01

    申请号:US845343

    申请日:1997-04-25

    IPC分类号: G01V3/00

    CPC分类号: G01R33/4824

    摘要: Spiral gradient design for a k-space trajectory using gradient amplifier parameters includes first determining an angle between a given gradient, g.sub.n, and the next gradient, g.sub.n+1, and then determining the magnitude of .vertline.g.sub.n+1 .vertline. based on gradient constraints represented by a circle or other shape surrounding and offset from the distal end of g.sub.n, where g.sub.n+1 extends along

    摘要翻译: 使用梯度放大器参数的k空间轨迹的螺旋梯度设计包括首先确定给定梯度gn和下一个梯度gn + 1之间的角度,然后确定| gn + 1 | 基于由围绕和偏离gn的远端的圆或其他形状表示的梯度约束,其中gn + 1沿着

    Full echo spiral-in/spiral-out magnetic resonance imaging
    6.
    发明授权
    Full echo spiral-in/spiral-out magnetic resonance imaging 失效
    全回波螺旋输入/螺旋输出磁共振成像

    公开(公告)号:US5650723A

    公开(公告)日:1997-07-22

    申请号:US643650

    申请日:1996-05-06

    申请人: Craig H. Meyer

    发明人: Craig H. Meyer

    IPC分类号: G01R33/48 G01R33/54 G01V3/00

    摘要: T.sub.2 -weighted interleaved spiral scanning is employed for imaging abdominal tumors. The gradients scan k-space in a spiral-in and spiral-out sequence with a first spiral starting at the edge of k-space and reaching the origin at signal echo time and then spiraling out to the edge of k-space preferably as a k-space conjugate of the inward spiral. A set of interleaves rotated through 180.degree. contains sufficient data to reconstruct an image. Rotating through a full 360.degree. provides additional insensitivity to T.sub.2 decay, inhomogeneity, and flow.

    摘要翻译: 采用T2加权交错螺旋扫描成像腹部肿瘤。 梯度以螺旋入射和螺旋输出序列扫描具有第一螺旋的k空间,从k空间的边缘开始并在信号回波时间到达原点,然后螺旋出k空间的边缘,优选为 向内螺旋的k空间共轭。 一组旋转180°的交错包含足够的数据来重构图像。 360度旋转对T2衰减,不均匀性和流动性提供了额外的不敏感性。

    SYSTEMS AND METHODS FOR REDUCED OFF-RESONANCE BLURRING IN SPIRAL IMAGING
    8.
    发明申请
    SYSTEMS AND METHODS FOR REDUCED OFF-RESONANCE BLURRING IN SPIRAL IMAGING 有权
    用于减少螺旋成像中的非共振辐射的系统和方法

    公开(公告)号:US20140152304A1

    公开(公告)日:2014-06-05

    申请号:US13868095

    申请日:2013-04-22

    IPC分类号: G01R33/565

    CPC分类号: G01R33/565 G01R33/4824

    摘要: Systems, methods of reducing off-resonance blurring in acquired magnetic resonance imaging data. The method includes acquiring a first set of spiral interleaf data for each of one or more spiral-in/out interleaves by performing a first sampling each of one or more locations in k-space along a first redundant spiral-in/out trajectory, and acquiring a second set of spiral interleaf data for each of the one or more spiral-in/out interleaves by performing a second sampling of each of the one or more locations in the k-space along a second redundant spiral-in/out trajectory, wherein the second redundant spiral-in/out trajectory corresponds to a time-reversed trajectory of the first redundant spiral-in/out trajectory. The method may yet further include combining the first set of spiral interleaf data and the second set of spiral interleaf data with an averaging operation such as to reduce artifacts.

    摘要翻译: 系统,减少获取的磁共振成像数据中的非共振模糊的方法。 该方法包括:通过沿着第一冗余螺旋进/出轨迹对k空间中的一个或多个位置执行第一采样,获取一个或多个螺旋输入/输出交错中的每一个的第一组螺旋插入数据,以及 通过沿着第二冗余螺旋进/出轨迹执行所述k空间中的所述一个或多个位置中的每个位置的第二采样来获取所述一个或多个螺旋输入/输出交错中的每一个的第二组螺旋插入数据, 其中所述第二冗余螺旋进/出轨迹对应于所述第一冗余螺旋进/出轨迹的时间反转轨迹。 该方法还可以包括将第一组螺旋插入数据和第二组螺旋插值数据与平均化操作组合,以减少伪影。