公开(公告)号：US09322892B2

公开(公告)日：2016-04-26

申请号：US13726278

申请日：2012-12-24

Applicant: General Electric Company

Inventor： Weijun Shen ,  Timothy John Havens ,  Longzhi Jiang ,  Saikat Saha ,  Benjamin Jacob Gronemeyer ,  Venkata Kishore Mogatadakala

IPC: G01V3/00 ,  G01R33/3875 ,  G01R33/34 ,  G01R33/565 ,  G01R33/38 ,  G01R33/3815

CPC classification number: G01R33/56518 ,  G01R33/34023 ,  G01R33/3804 ,  G01R33/3815 ,  G01R33/3875 ,  H01F6/04 ,  H01F6/06 ,  Y10T29/49014

Abstract: A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (MRI) system. The cryostat includes a vacuum casing having a vacuum therein. A cryogen vessel is disposed within the casing, the vessel having a coolant therein. A thermal shield is disposed between the vacuum casing and the cryogen vessel. An eddy current compensation assembly is disposed within the casing. The eddy current compensation assembly includes a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system.

Abstract translation: 用于磁场失真补偿的系统和方法包括用于磁共振成像（MRI）系统的低温恒温器。 低温恒温器包括其中具有真空的真空壳体。 冷冻剂容器设置在壳体内，容器内具有冷却剂。 在真空壳体和冷冻剂容器之间设置热屏蔽。 涡流补偿组件设置在壳体内。 涡流补偿组件包括形成在真空壳体，冷冻剂容器和热屏蔽中的一个上的多个导电回路，并被构造成减轻MRI系统中振动引起的涡流。

公开(公告)号：US10185019B2

公开(公告)日：2019-01-22

申请号：US14962345

申请日：2015-12-08

Applicant: General Electric Company

Inventor： Weijun Shen ,  Timothy John Havens ,  Longzhi Jiang ,  Saikat Saha ,  Benjamin Jacob Gronemeyer ,  Venkata Kishore Mogatadakala

IPC: G01R33/565 ,  G01R33/3875 ,  G01R33/34 ,  G01R33/38 ,  G01R33/3815 ,  H01F6/04 ,  H01F6/06

Abstract: A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (MRI) system. The cryostat includes a vacuum casing having a vacuum therein. A cryogen vessel is disposed within the casing, the vessel having a coolant therein. A thermal shield is disposed between the vacuum casing and the cryogen vessel. An eddy current compensation assembly is disposed within the casing. The eddy current compensation assembly includes a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system.

公开(公告)号：US20160252598A1

公开(公告)日：2016-09-01

申请号：US14962345

申请日：2015-12-08

Applicant: General Electric Company

Inventor： Weijun Shen ,  Timothy John Havens ,  Longzhi Jiang ,  Saikat Saha ,  Benjamin Jacob Gronemeyer ,  Venkata Kishore Mogatadakala

IPC: G01R33/565 ,  H01F6/04 ,  G01R33/3875 ,  H01F6/06 ,  G01R33/38 ,  G01R33/3815

CPC classification number: G01R33/56518 ,  G01R33/34023 ,  G01R33/3804 ,  G01R33/3815 ,  G01R33/3875 ,  H01F6/04 ,  H01F6/06 ,  Y10T29/49014

Abstract: A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (MRI) system. The cryostat includes a vacuum casing having a vacuum therein. A cryogen vessel is disposed within the casing, the vessel having a coolant therein. A thermal shield is disposed between the vacuum casing and the cryogen vessel. An eddy current compensation assembly is disposed within the casing. The eddy current compensation assembly includes a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system.

公开(公告)号：US20130157865A1

公开(公告)日：2013-06-20

申请号：US13726278

申请日：2012-12-24

Applicant: General Electric Company

Inventor： Weijun Shen ,  Timothy John Havens ,  Longzhi Jiang ,  Saikat Saha ,  Benjamin Jacob Gronemeyer ,  Venkata Kishore Mogatadakala

IPC: G01R33/3875 ,  G01R33/34

CPC classification number: G01R33/56518 ,  G01R33/34023 ,  G01R33/3804 ,  G01R33/3815 ,  G01R33/3875 ,  H01F6/04 ,  H01F6/06 ,  Y10T29/49014

Abstract: A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (MRI) system. The cryostat includes a vacuum casing having a vacuum therein. A cryogen vessel is disposed within the casing, the vessel having a coolant therein. A thermal shield is disposed between the vacuum casing and the cryogen vessel. An eddy current compensation assembly is disposed within the casing. The eddy current compensation assembly includes a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system.

Abstract translation: 用于磁场失真补偿的系统和方法包括用于磁共振成像（MRI）系统的低温恒温器。 低温恒温器包括其中具有真空的真空壳体。 冷冻剂容器设置在壳体内，容器内具有冷却剂。 在真空壳体和冷冻剂容器之间设置热屏蔽。 涡流补偿组件设置在壳体内。 涡流补偿组件包括形成在真空壳体，冷冻剂容器和热屏蔽中的一个上的多个导电回路，并被构造成减轻MRI系统中振动引起的涡流。