公开(公告)号：US09880244B2

公开(公告)日：2018-01-30

申请号：US14584501

申请日：2014-12-29

Applicant: GENERAL ELECTRIC COMPANY ,  BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM

Inventor： Ken-Pin Hwang ,  Zachary William Slavens ,  Ersin Bayram ,  Kang Wang ,  Daniel Litwiller ,  Jingfei Ma

IPC: G01R33/48 ,  G01R33/561

CPC classification number: G01R33/4828 ,  G01R33/5616

Abstract: A method that includes obtaining an MRI gradient echo train of at least three echo data sets at differing phase angles; producing a plurality of phase error maps among the at least three echo data sets; and imaging at least three distinct chemical species based on the plurality of phase error maps.

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：US20160187447A1

公开(公告)日：2016-06-30

申请号：US14584501

申请日：2014-12-29

Applicant: GENERAL ELECTRIC COMPANY ,  BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM

Inventor： KEN-PIN HWANG ,  Zachary William Slavens ,  Ersin Bayram ,  Kang Wang ,  Daniel Litwiller ,  Jingfei Ma

IPC: G01R33/561 ,  G01R33/48

CPC classification number: G01R33/4828 ,  G01R33/5616

Abstract: A method that includes obtaining an MRI gradient echo train of at least three echo data sets at differing phase angles; producing a plurality of phase error maps among the at least three echo data sets; and imaging at least three distinct chemical species based on the plurality of phase error maps.

Abstract translation: 一种方法，其包括以不同的相位角度获得至少三个回波数据集的MRI梯度回波串; 在所述至少三个回波数据集之间产生多个相位误差图; 以及基于所述多个相位误差图来成像至少三种不同的化学物质。

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：US09727953B2

公开(公告)日：2017-08-08

申请号：US14755793

申请日：2015-06-30

Applicant: General Electric Company

Inventor： Weitian Chen ,  Robert Donald Peters ,  Zachary William Slavens ,  Kevin Matthew Koch

IPC: G06K9/00 ,  G06T5/00 ,  G06T7/00 ,  G06T5/20 ,  G01R33/565

CPC classification number: G06T5/002 ,  G01R33/56536 ,  G06T5/20 ,  G06T7/0012 ,  G06T2207/10088

Abstract: An apparatus for detecting and repairing a ring artifact in a multi-spectral magnetic resonance image includes an image processor, which is configured to obtain an off-resonance magnetic field map and a deblurred composite image, to calculate a spatial gradient of the image based on the magnetic field map, to kernel search the spatial gradient, to mask the image, based on the kernel search, in order to identify voxels affected by a ring artifact, and to apply a filter in order to smooth intensities of the voxels identified by the image mask.