公开(公告)号：US20140312897A1

公开(公告)日：2014-10-23

申请号：US13866820

申请日：2013-04-19

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Ek Tsoon Tan ,  Christopher Judson Hardy ,  Kevin Franklin King ,  Zachary William Slavens ,  Luca Marinelli ,  Robert Marc Lebel

IPC: G01R33/565

CPC classification number: G01R33/56581 ,  G01R33/56341 ,  G01R33/56572

Abstract: Systems and methods for correcting magnetic resonance (MR) data are provided. One method includes receiving the MR data and correcting errors present in the MR data due to non-uniformities in magnetic field gradients used to generate the diffusion weighted MR signals. The method also includes correcting errors present in the MR data due to concomitant gradient fields present in the magnetic field gradients by using one or more gradient terms. At least one of the gradient terms is corrected based on the correction of errors present in the MR data due to the non-uniformities in the magnetic field gradients.

Abstract translation: 提供了用于校正磁共振（MR）数据的系统和方法。 一种方法包括由于用于产生扩散加权MR信号的磁场梯度中的不均匀性，接收MR数据并校正MR数据中存在的错误。 该方法还包括通过使用一个或多个梯度项来校正存在于磁场梯度中的伴随的梯度场的MR数据中存在的误差。 由于磁场梯度中的不均匀性，基于MR数据中存在的误差的校正来校正至少一个梯度项。

公开(公告)号：US20140185894A1

公开(公告)日：2014-07-03

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: 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空间位置的复数数据集和用于每个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。

公开(公告)号：US09897678B2

公开(公告)日：2018-02-20

申请号：US13866820

申请日：2013-04-19

Applicant: General Electric Company

Inventor： Ek Tsoon Tan ,  Christopher Judson Hardy ,  Kevin Franklin King ,  Zachary William Slavens ,  Luca Marinelli ,  Robert Marc Lebel

IPC: G01V3/00 ,  G01R33/565 ,  G01R33/563

CPC classification number: G01R33/56581 ,  G01R33/56341 ,  G01R33/56572

Abstract: Systems and methods for correcting magnetic resonance (MR) data are provided. One method includes receiving the MR data and correcting errors present in the MR data due to non-uniformities in magnetic field gradients used to generate the diffusion weighted MR signals. The method also includes correcting errors present in the MR data due to concomitant gradient fields present in the magnetic field gradients by using one or more gradient terms. At least one of the gradient terms is corrected based on the correction of errors present in the MR data due to the non-uniformities in the magnetic field gradients.

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。

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.

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。