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System and apparatus for balancing radial forces in a gradient coil

A technology of gradient coils and balance coils, applied in the field of systems and devices for balancing radial forces, can solve problems such as helium boiling

Inactive Publication Date: 2013-04-10
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Additionally, vibrations in the gradient coil assembly can cause helium boiling in the magnet cryostat

Method used

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  • System and apparatus for balancing radial forces in a gradient coil
  • System and apparatus for balancing radial forces in a gradient coil
  • System and apparatus for balancing radial forces in a gradient coil

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Embodiment Construction

[0015] figure 1 It is a schematic block diagram of an exemplary magnetic resonance imaging (MRI) system according to an embodiment. The operation of the MRI system 10 is controlled by an operator console 12, and the operator console 12 includes a keyboard or other input device 13, a control panel 14, and a display 16. The console 12 communicates with the computer system 20 via the link 18 and provides an interface for the operator to specify MRI scans, display the resulting images, perform image processing on the images, and archive data and images. The computer system 20 includes a plurality of modules that communicate with each other through electrical and / or data connections provided, for example, by using the backplane 20a. The data connection may be a direct wired link or may be an optical fiber connection or a wireless communication link. The modules of the computer system 20 include an image processor module 22, a CPU module 24, and a memory module 26. The memory module...

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Abstract

The invention provides a system and an apparatus for balancing radial forces in a gradient coil. A gradient coil apparatus (304, 404) for a magnetic resonance imaging (MRI) system includes an inner gradient coil assembly (324, 424) and an outer gradient coil assembly (326, 426) disposed around the inner gradient coil assembly. The outer gradient coil assembly has an outer surface, a first end (344, 444) and a second end (346, 446). The gradient coil apparatus also includes a force balancing apparatus disposed around the outer surface of the outer gradient coil assembly. In one embodiment, the force balancing apparatus includes an active force balancing coil (352, 354) disposed around the outer surface of the outer gradient coil assembly. In another embodiment, the force balancing apparatus includes a first passive conducting strip (470) disposed around the first end (444) of the outer gradient coil assembly and a second passive conducting strip (472) disposed around the second end (444) of the outer gradient coil assembly.

Description

[0001] Cross references to related applications [0002] This application claims the benefit of U.S. Provisional Application Serial No. 61 / 503,401 filed on June 30, 2011, the entire contents of which are incorporated herein by reference. Technical field [0003] The present invention relates generally to magnetic resonance imaging (MRI) systems, and in particular to systems and devices for balancing radial forces in the balanced gradient coils of MRI systems. Background technique [0004] Magnetic resonance imaging (MRI) is a medical imaging modality that can generate pictures of the inside of the human body without using x-rays or other ionizing radiation. MRI uses powerful magnets to generate a strong, uniform, static magnetic field (the "main magnetic field"). When the human body or part of the human body is placed in the main magnetic field, the nuclear spins associated with the hydrogen nuclides in the tissue water become polarized. This means that the magnetic moments associ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/385
CPCG01R33/3854
Inventor T·K·基丹T·J·黑文斯江隆植
Owner GENERAL ELECTRIC CO
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