Magnetic field adjusting device on high-openness superconduction magnetic resonance magnet

A technology of superconducting magnetic resonance and adjusting device, which is applied in the direction of measuring device, measuring magnetic variable, instrument, etc., can solve the problems of large leakage magnetic field range, processing error of main magnet, difficulty in designing superconducting magnet, etc.
CN102590771AInactive Publication Date: 2012-07-18NINGBO JANSEN MECHANISM CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NINGBO JANSEN MECHANISM CORP
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a magnetic field adjusting device on a high-openness superconduction magnetic resonance magnet. The design difficulty of the high-openness superconduction magnetic resonance magnet is large than that of the common superconduction magnetic resonance magnet, an imaging region has more non-uniform magnetic field and larger leakage magnetic field range due to the limit of the openness of the high-openness superconduction magnetic resonance magnet to sizes of all parts of the magnet, and a superconduction coil and other ferro magnetic materials bear sizable magnetic force. The invention discloses a magnetic field regulating device on the high-openness superconduction magnetic resonance magnet, which comprises a low-temperature dewar fixed on an iron yoke superconduction coil and a superconduction coil arranged in the low-temperature dewar, wherein a magnetic field regulating device corresponding to the superconduction coil is arranged on the iron yoke, and comprises one or more high-permeability components. By using the change of the ferro magnetic material to the magnetic field, the uniformity of the magnetic field of the imaging region is improved, and the size and the range of a leakage magnetic field are reduced.
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Description

technical field

[0001] The invention relates to a magnetic field adjustment device used on a high-openness superconducting magnetic resonance magnet. Background technique

[0002] The magnetic resonance imaging system is a powerful imaging device, and the main magnet is one of its main hardware, which can provide a high-intensity, stable, and highly uniform magnetic field in a designated imaging area. In addition to meeting the above requirements, high-opening magnets can greatly eliminate the claustrophobic feeling of patients in clinical practice due to the low degree of closure in size, and bring convenience to scanning inspections, so they are more popular than ordinary magnets.

[0003] However, the design of superconducting magnets with a high degree of openness is more difficult than ordinary superconducting magnets. The limitation of the degree of openness on the size of each part of the magnet leads to a more uneven magnetic field in the imaging area and a larger ra...

Claims

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