System for magnetic field distortion compensation and method of making same

A magnetic resonance imaging and refrigerator technology, applied in magnetic resonance measurement, instruments, and measuring magnetic variables, can solve the problems of increasing the cost and complexity of the MR system and increasing the computational complexity of the image reconstruction process.

Active Publication Date: 2014-07-02
GENERAL ELECTRIC CO
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, such methods are unlikely to adequately reduce the induced eddy currents
Such methods also increase

Method used

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  • System for magnetic field distortion compensation and method of making same
  • System for magnetic field distortion compensation and method of making same
  • System for magnetic field distortion compensation and method of making same

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Embodiment Construction

[0027] refer to figure 1 , shows the main components of a magnetic resonance imaging (MRI) system 10 incorporating one embodiment of the present invention. For certain functions, the operation of the system is controlled from an operator console 12 , which in this example includes a keyboard or other input device 13 , a control panel 14 and a display screen 16 . Console 12 communicates via link 18 with a separate computer system 20 that enables an operator to control the generation and display of images on display screen 16 . Computer system 20 includes a plurality of modules that communicate with each other through backplane 20a. These modules include an image processor module 22, a CPU module 24, and a memory module 26, known in the art as a frame buffer for storing an array of image data. Computer system 20 communicates with individual system controls 32 via high speed serial link 34 . The input device 13 may include a mouse, joystick, keyboard, trackball, touch-activat...

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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.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of U.S. Nonprovisional Application No. 13 / 690,312 filed November 30, 2012 and claims the prior Priority is claimed to this non-provisional application, which claims priority to an earlier application, US Provisional Application No. 61 / 577,805, filed December 20, 2011, the disclosure of which is incorporated herein by reference. technical field [0003] Embodiments of the present invention generally relate to a magnetic resonance imaging (MRI) system, and in particular, to a system and apparatus for compensating for magnetic field distortions caused by mechanical vibrations in an MRI system. Background technique [0004] Magnetic resonance imaging (MRI) is a medical imaging method that produces images of the inside of the human body without the use of x-rays or other ionizing radiation. MRI uses strong magnets to create a strong, uniform, static magnetic field (ie, the "main ...

Claims

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Application Information

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IPC IPC(8): G01R33/38G01R33/387
Inventor W.沈T.J.黑文斯江隆植S.萨哈B.J.格罗内迈尔V.K.莫加塔达卡拉
Owner GENERAL ELECTRIC CO
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