公开(公告)号：US10295630B2

公开(公告)日：2019-05-21

申请号：US14839444

申请日：2015-08-28

Applicant: General Electric Company

Inventor： Sung Man Moon ,  Shahed Ashraf ,  William Louis Einziger ,  Derek Allan Seeber

IPC: G01R33/385

Abstract: Methods and systems are provided for a variable wire dimension gradient coil. In one example, a gradient coil includes a length of coiled wire, the wire comprising a first segment having a first width and a second segment having a second width, the second width smaller than the first width.

公开(公告)号：US10254362B2

公开(公告)日：2019-04-09

申请号：US14927823

申请日：2015-10-30

Applicant: General Electric Company

Inventor： Jean-Baptiste Mathieu ,  Derek Allan Seeber ,  Seung-Kyun Lee

IPC: G01V3/00 ,  G01R33/3875 ,  G01R33/565

Abstract: A method for improving image quality in a magnetic resonance imaging system, the method includes rapidly modulating an electrical current in a matrix shim coil of the magnetic resonance imaging system to compensate high order eddy currents in the system.

公开(公告)号：US10031198B2

公开(公告)日：2018-07-24

申请号：US14818077

申请日：2015-08-04

Applicant: General Electric Company

Inventor： Derek Allan Seeber ,  Shahed Ashraf ,  Fengshun Tan ,  Sung Man Moon

IPC: G01R33/00 ,  G01R33/385

Abstract: Methods and systems are provided for a gradient coil assembly. In one embodiment, a gradient coil assembly comprises a hollow, first gradient coil and a solid, second gradient coil co-wound with the first gradient coil. In this way, the turn density of the gradient coil assembly may be increased.

公开(公告)号：US09638776B2

公开(公告)日：2017-05-02

申请号：US14466551

申请日：2014-08-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Michael Parizh ,  Derek Allan Seeber ,  Seung-Kyun Lee ,  Jean-Baptiste Mathieu

IPC: G01R33/3875

CPC classification number: G01R33/3875

Abstract: Embodiments of the invention are utilized to improve shimming capability while reducing radial space and the volume required to contain active shim coils by nesting the coils of different degrees and orders inside each other and limiting the azimuthal span of the individual saddle coils. This allows two or more radial shim sets to be combined together in the same layer resulting in a significant radial savings that increases the useable portion of an MRI system.

公开(公告)号：US20160054407A1

公开(公告)日：2016-02-25

申请号：US14466551

申请日：2014-08-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Michael Parizh ,  Derek Allan Seeber ,  Seung-Kyun Lee ,  Jean-Baptiste Mathieu

IPC: G01R33/3875 ,  G01R33/34

CPC classification number: G01R33/3875

Abstract: Embodiments of the invention are utilized to improve shimming capability while reducing radial space and the volume required to contain active shim coils by nesting the coils of different degrees and orders inside each other and limiting the azimuthal span of the individual saddle coils. This allows two or more radial shim sets to be combined together in the same layer resulting in a significant radial savings that increases the useable portion of an MRI system.

Abstract translation: 本发明的实施例用于通过将不同程度和顺序的线圈彼此嵌套并限制单个鞍形线圈的方位角跨度来减小径向空间和包含有效垫片线圈所需的体积，从而改善匀场能力。 这允许将两个或更多个径向垫片组合在同一层中，导致显着的径向节省，从而增加MRI系统的可用部分。

公开(公告)号：US20140184226A1

公开(公告)日：2014-07-03

申请号：US13728718

申请日：2012-12-27

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Derek Allan Seeber

IPC: G01R33/3875 ,  G01R33/341

CPC classification number: G01R33/3875

Abstract: A gradient coil apparatus for a magnetic resonance imaging (MRI) system includes an inner gradient coil assembly having at least one inner gradient coil and an outer gradient coil assembly disposed around the inner gradient coil assembly and having at least one outer gradient coil. A matrix shim coil is positioned at a radius within the gradient coil apparatus and is configured to provide high order shimming.

Abstract translation: 用于磁共振成像（MRI）系统的梯度线圈装置包括具有至少一个内部梯度线圈和设置在内部梯度线圈组件周围并且具有至少一个外部梯度线圈的外部梯度线圈组件的内部梯度线圈组件。 矩阵垫片线圈位于梯度线圈装置内的半径处并且被配置为提供高顺序匀场。