Superconducting magnet apparatus and nuclear magnetic resonance imaging apparatus

A technology of superconducting magnets and magnetic fields, applied in the direction of superconducting magnets/coils, measuring devices, magnetic objects, etc., can solve the problems of increased number of parts, increased space size, increased weight, etc., to achieve suppression of deformation, suppression of total weight, The effect of stabilizing the magnetic field for high-precision measurement
CN101017722AInactive Publication Date: 2007-08-15HITACHI LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HITACHI LTD
Publication Date
2007-08-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an MRI device wherein the deformations caused at welding and the deterioration of current-carrying performance of a superconducting coil due to heat are restrained, and further the height in vertical direction and weight are suppressed. A superconducting magnet device 110 includes two circle-like helium vessels 7 substantially symmetrically, vertically arranged to have a space therebetween. Each of vessels contains a main coil 1 for generating a measuring magnetic field and a shield coil 3 for generating a magnetic field for suppressing leak to the outside of the measuring magnetic field, together with a liquid helium. At a center part of a symmetrical plane between the vessels, a uniform measuring magnetic field is generated. An opposite surface of a surface facing the symmetrical plane of the circle-like helium vessel 7 is made of a thick plate 5 acting as a structural supporting member. A shield coil bobbin 4 containing the shield coil 3 is supported by the thick plate 5. A main coil bobbin 2 housing the main coil 1 is supported by the thick plate 5 and the shield coil bobbin 4.
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Description

technical field

[0001] The present invention relates to a superconducting magnet device and a nuclear magnetic resonance imaging device (hereinafter abbreviated as MRI (Magnetic Resonance Imaging) device) using the superconducting magnet device. Background technique

[0002] In recent years, open-type MRI apparatuses that do not give patients such as subjects a sense of closure have become popular. In an open MRI apparatus, annular helium containers filled with liquid helium are symmetrically provided above and below a space in which a subject is placed, and a bobbin (coil bobbin) on which a superconducting coil is wound is accommodated therein.

[0003] In such an MRI apparatus, generally, a support structure is used to support the coil bobbin, and the entire support structure and the coil bobbin are covered with a helium container. In the case of such a structure, it is necessary to increase the size of the space. At this time, since the bobbin and the supporting structu...

Claims

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