Magnet device

Abstract

The invention provides a magnet device. The magnet device comprises a coil frame extending in the axial direction, a plurality of coils arranged on the coil frame, a first shell and a second shell. The coils are sequentially arranged in the axial direction. The first shell is fixed to the coil frame and surrounds the exteriors of the coils, and the coil frame and the first shell form a cavity used for containing low-temperature cooling liquid. The cavity has a first width in the radial direction. The second shell is arranged outside the first shell. An annular cavity is formed between the first shell and the second shell and has a second width in the radial direction, and the second width is larger than the first width. By means of the technical scheme, the coils are totally or partially soaked in the cavity small in volume; the structure is applied to superconductive magnetic resonance, the superconductive coils can be mostly soaked in low-temperature liquid, stable running of the superconductive coils is guaranteed, and the large filling size of the low-temperature liquid is also greatly reduced.

Description

technical field [0001] The invention relates to the field of medical imaging, in particular to a magnet device. Background technique [0002] With the vigorous development of superconducting technology and superconducting materials, superconducting magnet technology has very broad application prospects. Superconducting magnets have the advantages of high current density, low energy consumption, small size, and high magnetic field strength. They are widely used in basic scientific research, transportation, industrial technology, and medical and health fields. For example, in the field of medical technology, superconducting MRI systems composed of superconducting magnets are rapidly replacing permanent magnet MRI systems, and have become one of the mainstream medical imaging equipment. Among them, the role of the superconducting magnet is to provide a stable and uniform main magnetic field for the superconducting MRI system. [0003] Due to the limitation of superconducting ...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure MRI is: not only the manufacturing cost of the helium container is expensive, but also the amount of liquid helium that needs to be filled is huge, and the cryogenic cost is huge

[0005] Therefore, it is necessary to provide a new superconducting magnet system to solve the problem of large amount of liquid helium in the current superconducting magnet system, and at the same time ensure the stable operation of the superconducting magnet

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