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Superconducting magnet apparatus in magnetic resonance imaging system

A technology for magnetic resonance imaging and superconducting magnets, which is applied in superconducting magnets/coils, measuring devices, magnetic objects, etc., and can solve problems such as coil displacement, magnet quench, and unstable support structures.

Inactive Publication Date: 2017-12-01
NANYANG CITY CENT HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Instability of any coil support structure formed by the slots will cause small displacements of the coils causing quenching of the magnets

Method used

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  • Superconducting magnet apparatus in magnetic resonance imaging system
  • Superconducting magnet apparatus in magnetic resonance imaging system
  • Superconducting magnet apparatus in magnetic resonance imaging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: A superconducting magnet device in a magnetic resonance imaging system, including an inner cylinder 8 and an outer cylinder 5 sleeved on the inner cylinder 8, the inner cylinder is provided with an annular sleeve 13, and the annular sleeve There is an inner wire groove 6 on the top, and the wire of the magnet is wound in the inner wire groove. The annular sleeve is provided with two arc clips 12, and the arc clip is provided with the inner wire groove. The matching upper wire groove 10, the annular sleeve is provided with several through holes 15 that pass through the inner wire groove wall 13-1 and communicate with the inner wire groove, the sleeve between the inner wire grooves Several guide grooves 7 are provided on the barrel, and several upper guide holes 11 passing through the arc clamp body and connecting with the upper wire groove are provided on the arc clamp body, and the arc clamp body is provided with There are several upper guide holes 9 commu...

Embodiment 2

[0040] Embodiment 2: A superconducting magnet device in a magnetic resonance imaging system, comprising an inner cylinder 8 and an outer cylinder 5 set on the inner cylinder 8, the inner cylinder is provided with an annular sleeve 13, and the annular sleeve There is an inner wire groove 6 on the top, and the wire of the magnet is wound in the inner wire groove, and the wire is wound into a circle. Two arc clips 12 are arranged on the annular sleeve, and There is an upper wire groove 10 that matches the inner wire groove, and the annular sleeve is provided with several through holes 15 that pass through the wall of the inner wire groove and communicate with the inner wire groove. The sleeve in between is provided with several guide grooves 7, and the arc clip body is provided with several upper guide holes 11 passing through the clip body and communicating with the upper conductor groove, and the arc clip body is provided with There are several upper guide holes 9 communicating...

Embodiment 3

[0054] Embodiment 3: The difference between it and Embodiment 2 is that the arc-shaped clip body is preferably a semicircular clip body, and the clip body is provided with threads, and the arc-shaped clip body is threadedly connected with a threaded sleeve. There are several ventilation holes, the ventilation holes communicate with the through holes on the clip body, the pressing mechanism is pressed on the threaded sleeve, and the coil is fixed more firmly. After adopting the above-mentioned improvement of embodiment 2, it is not easy to use In the actual test process, the maximum allowable current of the wire is not exceeded. The normal current is 500A, and the current is increased to 863A. After 1 year of operation, there is no quench fault. At the same time, the wire has not occurred after disassembly and inspection Displacement, the structure of the prior art is used in the test process, such as the patent disclosed in CN103887035B, the normal power supply is 500A, and the...

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Abstract

The invention discloses a superconducting magnet apparatus in a magnetic resonance imaging system. The superconducting magnet apparatus comprises a magnet inner cylinder and an outer cylinder arranged on the inner cylinder in a sleeving manner; an annular sleeve is arranged on the inner cylinder; inner wire grooves are formed in the annular sleeve; a wire of each magnet is wound in the corresponding inner wire groove; two arc-shaped clamp bodies are arranged on the annular sleeve; upper wire grooves matched with the inner wire grooves are formed in the clamp bodies; multiple through holes which pass through the inner wire groove walls to be connected with the inner wire grooves are formed in the annular sleeve; and a compressing mechanism for compressing the arc-shaped clamp bodies is arranged on the outer cylinder. The magnet apparatus provided by the invention is good in cooling effect and firm in fixation, and more importantly, the magnet inner cylinder and the outer cylinder are high in hoisting stability, and the coil does not suffer from displacement easily, so that the superconducting magnet apparatus does not suffer from quench easily and is high in operation stability.

Description

technical field [0001] The invention relates to the technical field of medical nuclear magnetic resonance equipment, in particular to a superconducting magnet device in a magnetic resonance imaging system. Background technique [0002] The MRI market of high-end medical imaging products is in the ascendant, and the competition among various forces is extremely fierce. Safe and stable operation, good image quality, and low maintenance costs are the basic requirements of consumers for this type of product. The superconducting magnet is the core component of the MRI system, and its reasonable design and stable operation are related to the performance of the entire MRI system. Superconducting magnets used in MRI systems generally consist of several groups of solenoid coils wound on a magnet skeleton. In order to produce the high magnetic field uniformity required for MR imaging, several groups of coil support structures composed of wire slots are usually arranged on the magnet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F6/00H01F6/04G01R33/3815
CPCG01R33/3815H01F6/00H01F6/04
Inventor 吕国义
Owner NANYANG CITY CENT HOSPITAL
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