知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

40 records (took 0.026 seconds)

    GENERALIZED SPHERICAL DECONVOLUTION IN DIFFUSION MAGNETIC RESONANCE IMAGING
    11.
    发明申请
    GENERALIZED SPHERICAL DECONVOLUTION IN DIFFUSION MAGNETIC RESONANCE IMAGING 审中-公开
    扩散磁共振成像中的广义球形解卷积

    公开(公告)号：US20160334489A1

    公开(公告)日：2016-11-17

    申请号：US14711650

    申请日：2015-05-13

    Applicant: General Electric Company

    Inventor： Jonathan Immanuel Sperl ,  Christopher Judson Hardy ,  Luca Marinelli ,  Marion Irene Menzel ,  Ek Tsoon Tan

    IPC: G01R33/563 ,  G01R33/56 ,  G01R33/561 ,  G01R33/385

    CPC classification number: G01R33/56341 ,  G01R33/5608

    Abstract: A magnetic resonance imaging method includes generating spatially resolved fiber orientation distributions (FODs) from magnetic resonance signals acquired from a patient tissue using a plurality of diffusion encodings, each acquired magnetic resonance signal corresponding to one of the diffusion encodings and being representative of a three-dimensional distribution of displacement of magnetic spins of gyromagnetic nuclei present in each imaging voxel. Generating the spatially resolved FODs includes performing generalized spherical deconvolution using the acquired magnetic resonance signals and a modeled tissue response matrix (TRM) to reconstruct the spatially resolved FODs. The method also includes using the spatially resolved FODs to generate a representation of fibrous tissue within the patient tissue.

    Abstract translation: 磁共振成像方法包括使用多个扩散编码从从患者组织获取的磁共振信号产生空间分辨纤维取向分布（FOD），每个获得的磁共振信号对应于一个扩散编码，并且代表三维 每个成像体素中存在的回旋磁核的磁自旋的位移的尺寸分布。 生成空间分辨的FOD包括使用获取的磁共振信号和建模的组织响应矩阵（TRM）来执行广义的球形去卷积以重构空间分辨的FOD。 该方法还包括使用空间分辨的FOD来产生患者组织内的纤维组织的表示。

    Complex reconstruction of Q-space for simultaneous detection of coherent and incoherent motion
    13.
    发明授权
    Complex reconstruction of Q-space for simultaneous detection of coherent and incoherent motion 有权
    Q空间的复杂重建，用于同时检测相干和非相干运动

    公开(公告)号：US08908951B2

    公开(公告)日：2014-12-09

    申请号：US13728871

    申请日：2012-12-27

    Applicant: General Electric Company

    Inventor： Marion Irene Menzel ,  Christopher Judson Hardy ,  Kevin Franklin King ,  Luca Marinelli ,  Ek Tsoon Tan ,  Jonathan Immanuel Sperl

    IPC: G06K9/00 ,  G06T7/00

    CPC classification number: G01R33/56341

    Abstract: A magnetic resonance (MR) imaging method includes acquiring MR signals having phase and magnitude at q-space locations using a diffusion sensitizing pulse sequence performed on a tissue of interest, wherein the acquired signals each include a set of complex Fourier encodings representing a three-dimensional displacement distribution of the spins in a q-space location. The signals each include information relating to coherent motion and incoherent motion in the q-space location. The method also includes determining a contribution by coherent motion to the phase of the acquired MR signals; removing the phase contribution attributable to coherent motion from the acquired MR signals to produce a complex data set for each q-space location and an image of velocity components for each q-space location; and producing a three-dimensional velocity image from the image of the velocity components.

    Abstract translation: 磁共振（MR）成像方法包括使用在感兴趣的组织上执行的扩散增感脉冲序列获取在q空间位置具有相位和幅度的MR信号，其中所获取的信号各自包括一组代表三维空间的复数傅里叶编码， 在q空间位置的自旋的三维位移分布。 每个信号包括与q空间位置中的相干运动和非相干运动有关的信息。 该方法还包括通过相干运动确定所获取的MR信号的相位的贡献; 从所获取的MR信号去除归因于相干运动的相位贡献，以产生用于每个q空间位置的复数据集合和用于每个q空间位置的速度分量的图像; 并根据速度分量的图像产生三维速度图像。

    RECONSTRUCTION OF MR IMAGE DATA
    15.
    发明申请
    RECONSTRUCTION OF MR IMAGE DATA 有权

    公开(公告)号：US20210208227A1

    公开(公告)日：2021-07-08

    申请号：US16733037

    申请日：2020-01-02

    Applicant: General Electric Company

    Inventor： Christopher Judson Hardy ,  Sangtae Ahn

    IPC: G01R33/56 ,  G06T5/50 ,  G06T11/00 ,  G06N20/00

    Abstract: The subject matter discussed herein relates to a fast magnetic resonance imaging (MRI) method to suppress fine-line artifact in Fast-Spin-Echo (FSE) images reconstructed with a deep-learning network. The network is trained using fully sampled NEX=2 (Number of Excitations equals to 2) data. In each case, the two excitations are combined to generate fully sampled ground-truth images with no fine-line artifact, which are used for comparison with the network generated image in the loss function. However, only one of the excitations is retrospectively undersampled and inputted into the network during training. In this way, the network learns to remove both undersampling and fine-line artifacts. At inferencing, only NEX=1 undersampled data are acquired and reconstructed.

    Diffusion spectrum imaging systems and methods
    18.
    发明授权
    Diffusion spectrum imaging systems and methods 有权

    公开(公告)号：US09720063B2

    公开(公告)日：2017-08-01

    申请号：US13718119

    申请日：2012-12-18

    Applicant: General Electric Company

    Inventor： Jonathan Immanuel Sperl ,  Christopher Judson Hardy ,  Luca Marinelli ,  Ek Tsoon Tan ,  Kevin Franklin King ,  Marion Irene Menzel

    IPC: G01R33/563

    CPC classification number: G01R33/56341

    Abstract: Systems and methods for generating a magnetic resonance (MR) image of a tissue are provided. A method includes acquiring MR raw data. The MR raw data corresponds to MR signals obtained at undersampled q-space locations for a plurality of q-space locations that is less than an entirety of the q-space locations and the MR signals at the q-space locations represent the three dimensional displacement distribution of the spins in the imaging voxel. The method also includes performing a joint image reconstruction technique on the MR raw data to exploit structural correlations in the MR signals to obtain a series of accelerated MR images and performing, for each image pixel in each accelerated MR image of the series of accelerated MR images, a compressed sensing reconstruction technique to exploit q-space signal sparsity to identify a plurality of diffusion maps.

    DIFFUSION SPECTRUM IMAGING SYSTEMS AND METHODS
    19.
    发明申请
    DIFFUSION SPECTRUM IMAGING SYSTEMS AND METHODS 有权
    扩散光谱成像系统和方法

    公开(公告)号：US20140167753A1

    公开(公告)日：2014-06-19

    申请号：US13718119

    申请日：2012-12-18

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： Jonathan Immanuel Sperl ,  Christopher Judson Hardy ,  Luca Marinelli ,  Ek Tsoon Tan ,  Kevin Franklin King ,  Marion Irene Menzel

    IPC: G01R33/48

    CPC classification number: G01R33/56341

    Abstract: Systems and methods for generating a magnetic resonance (MR) image of a tissue are provided. A method includes acquiring MR raw data. The MR raw data corresponds to MR signals obtained at undersampled q-space locations for a plurality of q-space locations that is less than an entirety of the q-space locations and the MR signals at the q-space locations represent the three dimensional displacement distribution of the spins in the imaging voxel. The method also includes performing a joint image reconstruction technique on the MR raw data to exploit structural correlations in the MR signals to obtain a series of accelerated MR images and performing, for each image pixel in each accelerated MR image of the series of accelerated MR images, a compressed sensing reconstruction technique to exploit q-space signal sparsity to identify a plurality of diffusion maps.

    Abstract translation: 提供了用于产生组织的磁共振（MR）图像的系统和方法。 一种方法包括获取MR原始数据。 MR原始数据对应于在低于q空间位置的整体的多个q空间位置处在欠采样q空间位置处获得的MR信号，并且在q空间位置处的MR信号表示三维位移 旋转成像体素的分布。 该方法还包括对MR原始数据执行联合图像重建技术以利用MR信号中的结构相关性，以获得一系列加速MR图像，并针对一系列加速MR图像的每个加速MR图像中的每个图像像素执行 ，一种利用q空间信号稀疏度来识别多个扩散图的压缩感测重建技术。

    Method and apparatus for automated tracking of vessel movement using MR imaging
    20.
    发明授权
    Method and apparatus for automated tracking of vessel movement using MR imaging 有权
    使用MR成像自动跟踪血管运动的方法和装置

    公开(公告)号：US08700125B2

    公开(公告)日：2014-04-15

    申请号：US13746983

    申请日：2013-01-22

    Applicant: General Electric Company

    Inventor： Manojkumar Saranathan ,  Christopher Judson Hardy ,  Thomas Kwok-Fah Foo

    IPC: A61B5/05

    CPC classification number: G01R33/56509 ,  A61B5/0037 ,  A61B5/055 ,  A61B5/7285 ,  G01R33/56 ,  G01R33/5673

    Abstract: A system and method is disclosed for tracking a moving object using magnetic resonance imaging. The technique includes acquiring a scout image scan having a number of image frames and extracting non-linear motion parameters from the number of image frames of the scout image scan. The technique includes prospectively shifting slice location using the non-linear motion parameters between slice locations while acquiring a series of MR images. The system and method are particularly useful in tracking coronary artery movement during the cardiac cycle to acquire the non-linear components of coronary artery movement during a diastolic portion of the R-R interval.

    Abstract translation: 公开了一种使用磁共振成像跟踪运动物体的系统和方法。 该技术包括获取具有多个图像帧的侦察图像扫描，并从侦察图像扫描的图像帧的数量中提取非线性运动参数。 该技术包括使用切片位置之间的非线性运动参数前进移位切片位置，同时获取一系列MR图像。 该系统和方法在心脏周期期间跟踪冠状动脉运动特别有用，以在R-R间期的舒张期期间获得冠状动脉运动的非线性分量。

Patent Agency Ranking