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Gradient magnetic field coil unit, gantry for MRI apparatus, and MRI apparatus

A technology of gradient magnetic field and coil unit, which is applied in the direction of measuring device, application, adjusting magnetic variable, etc., can solve the problem of inability to ensure space and so on

Active Publication Date: 2012-07-18
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, a sufficient space cannot be secured in the main coil cooling layer, the shim layer, and the shield coil cooling layer between the main coil layer and the shield coil layer.

Method used

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  • Gradient magnetic field coil unit, gantry for MRI apparatus, and MRI apparatus
  • Gradient magnetic field coil unit, gantry for MRI apparatus, and MRI apparatus
  • Gradient magnetic field coil unit, gantry for MRI apparatus, and MRI apparatus

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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0033] figure 1 It is a figure which shows the structure of the MRI apparatus 1 concerning embodiment of this invention. Such as figure 1 As shown, the MRI apparatus 1 has a housing 10 and a computer system 20 . The frame 10 has a static magnetic field magnet 11, an ASGC (Actively Shielded Gradient Coil: Actively Shielded Gradient Coil) type gradient magnetic field coil unit 12, a gradient magnetic field power supply 13, a treatment couch 14, a treatment couch control unit 15, a transmitting RF coil 16, a transmission part 17, receiving RF coil 18, and receiving part 19. Hereinafter, each constituent element will be described.

[0034] The static field magnet 11 has a hollow substantially cylindrical shape, and generates a static magnetic field in the substantially cylindrical interior. The substantially cylindrical shape includes not only a cylindrical shape but a...

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PUM

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Abstract

Provided is a gradient magnetic field coil unit includes a main coil layer that has a main coil for generating a gradient magnetic field and is formed in a substantially cylindrical shape, a shield coil layer that is attached to the outside of the main coil layer and has a shield coil for generating a magnetic field which shields a leakage magnetic field from the main coil, and a cooling layer that is attached between the main coil layer and the shield coil layer and has a plurality of flow paths for refrigerant, which are arranged in a substantially circumferential shape with the central axis of the main coil layer set to the center thereof, and a plurality of shim tray holding sections which hold a shim tray for a magnetic body.

Description

[0001] This application is based on and claims priority from Japanese Patent Application No. 2007-008123 filed on January 17, 2007 and No. 2007-296967 filed on November 15, 2007, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention relates to a gradient magnetic field coil unit having a passive shimming mechanism for correcting the uniformity of a magnetic field, a gantry for an MRI apparatus, and an MRI apparatus. Background technique [0003] A magnetic resonance diagnostic apparatus (Magnetic Resonance Imaging: MRI apparatus) has a substantially cylindrical static magnetic field magnet that generates a very strong static magnetic field. The static magnetic field generated by the static field magnet usually requires a strength of about several thousand Gauss to 10 thousand Gauss (1 Tesla). The static magnetic field requires spatial uniformity in addition to its strength. Spatial uniformity generally requires uni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/385G01R33/387G01R33/28A61B5/055
CPCG01R33/3856
Inventor 山下正干高森博光
Owner TOSHIBA MEDICAL SYST CORP