Dynamic Image Reconstruction with Tight Frame Learning
    31.
    发明申请
    Dynamic Image Reconstruction with Tight Frame Learning 有权
    动态图像重建与紧帧学习

    公开(公告)号:US20140097845A1

    公开(公告)日:2014-04-10

    申请号:US14027451

    申请日:2013-09-16

    IPC分类号: G01R33/48 G06T5/50

    摘要: A computer-implemented method for learning a tight frame includes acquiring undersampled k-space data over a time period using an interleaved process. An average of the undersampled k-space data is determined and a reference image is generated based on the average of the undersampled k-space data. Next, a tight frame operator is determined based on the reference image. Then, a reconstructed image data is generated from the undersampled k-space data via a sparse reconstruction which utilizes the tight frame operator.

    摘要翻译: 用于学习紧帧的计算机实现的方法包括使用交错处理在一段时间内获取欠采样的k空间数据。 确定欠采样的k空间数据的平均值,并且基于欠采样的k空间数据的平均值生成参考图像。 接下来,基于参考图像确定紧帧运算符。 然后,通过使用紧帧运算符的稀疏重构,从欠采样的k空间数据生成重建的图像数据。

    METHOD AND DEVICE FOR PHASE-SENSITIVE FLOW MEASUREMENT BY A MAGNETIC RESONANCE
    34.
    发明申请
    METHOD AND DEVICE FOR PHASE-SENSITIVE FLOW MEASUREMENT BY A MAGNETIC RESONANCE 有权
    用于通过磁共振测量相位敏感流量的方法和装置

    公开(公告)号:US20110153231A1

    公开(公告)日:2011-06-23

    申请号:US12975840

    申请日:2010-12-22

    IPC分类号: G06F19/00

    CPC分类号: G01R33/56316 G01R33/56383

    摘要: In a method and a device for phase-sensitive flow measurement of a volume segment of an examination subject in a measurement system, the volume segment is divided into multiple partial volume segments and the following steps are executed repeatedly until the volume segment has been completely measured: movement of a table such that a center of one of the partial volume segments to be measured essentially corresponds to the isocenter of the magnetic resonance system, and implementation of the phase-sensitive flow measurement for the partial volume segment to be measured while the center of the partial volume segment essentially corresponds to the isocenter.

    摘要翻译: 在用于测量系统中的检查对象的体积段的相敏度流量测量的方法和装置中,将体积段划分成多个部分体积段,并且重复执行以下步骤,直到体积段已被完全测量 :使得要测量的部分体积段中的一个的中心基本上对应于磁共振系统的等角点的台的移动,以及在中心处测量的部分体积段的相敏流测量的实现 的部分体积段基本上对应于等角点。

    Method and apparatus for sensitivity-encoded magnetic resonance imaging using an acquisition coil array
    35.
    发明授权
    Method and apparatus for sensitivity-encoded magnetic resonance imaging using an acquisition coil array 有权
    使用采集线圈阵列进行灵敏度编码磁共振成像的方法和装置

    公开(公告)号:US07821262B2

    公开(公告)日:2010-10-26

    申请号:US11753691

    申请日:2007-05-25

    IPC分类号: G01V3/00

    CPC分类号: G01R33/5611 G01R33/4824

    摘要: In a method as well as a magnetic resonance tomography apparatus for implementation of such a method for improved sensitivity-encoded magnetic resonance imaging using a two-dimensional or three-dimensional acquisition coil array, two-dimensional or three-dimensional undersampling of k-space is undertaken by measurement of a number N of basic partial trajectories τn in k-space that in their entirety form a geometric arrangement of source points, a number M of different operators Cm(Δ km) are determined, with each operator representing an algebraic transformation with which unmeasured target points at an interval Δ km from one of the measured source points are synthesized from a number of measured source points, the operators Cm(Δ km) are applied to at least one subset of the measured source points for at least partial completion of the magnetic resonance data set, and a largely artifact-free image is reconstructed in three-dimensional space on the basis of the measured source points and the synthesized data points.

    摘要翻译: 在一种方法以及用于实施这种用于使用二维或三维采集线圈阵列改进灵敏度编码的磁共振成像的方法的磁共振断层摄影装置中,k空间的二维或三维欠采样 通过测量k空间中的N个基本部分轨迹τn进行,其整体形成源点的几何排列,确定不同算子C m(&Dgr; km)的数量M,每个运算符表示代数 未测量的目标点的间隔&Dgr的转换; 从测量的源点之一合成一公里,将运算符Cm(&Dgr; km)应用于测量源点的至少一个子集,用于至少部分完成磁共振数据集, 并且基于测量的源点和合成数据点在三维空间中重建基本上无伪影的图像。