Magnet for head and limb magnetic resonance imaging device

A magnetic resonance imaging and magnet technology, applied in the field of medical equipment, can solve problems affecting the uniformity and smoothness of the magnetic circuit, the inability to ensure the parallelism of the upper and lower yokes of the magnet, and the hidden danger of increasing the mechanical strength, so as to achieve good magnetic field stability, small and smooth appearance, Effect on Neutral Guarantee

Inactive Publication Date: 2006-06-28
沈阳东软波谱磁共振技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the above-mentioned products all adopt a split assembly structure in the overall structure, the yoke iron part is composed of multiple parts, and the parallelism of the upper and lower yoke irons of the magnet cannot be guaranteed during processing and assembly, so the index of the magnet has been affected to a certain extent. In particular, it increases the hidden dangers of mechanical strength, and at the same time affects the uniformity and smoothness of the magnetic circuit.

Method used

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  • Magnet for head and limb magnetic resonance imaging device
  • Magnet for head and limb magnetic resonance imaging device
  • Magnet for head and limb magnetic resonance imaging device

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Embodiment Construction

[0019] combined with the above figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 Among them, the specific implementation mode of the present invention is described: the frame (1) in the figure is made of low carbon steel material, and the overall structure is C-shaped two-column open type. The structure is refined and uniform, and the internal stress is completely eliminated. After machining, high geometric accuracy and low surface roughness are obtained. Through the force analysis of the frame in the magnetic field, the frame has a high Strength, safe and reliable to use. The magnetic steel material (2) is made of NdFeB composite material, which is connected to the upper and lower surfaces of the frame (1) by bonding, the pole head (3) is bonded to the magnetic steel material (2), and the double-layer staggered anti-eddy current disc (4) The silicon steel sheet of the composite plate material is selected and glued in the annular groove of the pole head (3), and 12 ...

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Abstract

The invention relates to a magnetic body for head- limb magnetic resonant imaging device, which comprises an open C type rack with two upright columns, a magnetic steel material, a cartridge, an anti-spinning disk, a shimming ring adjustment sheet, a shimming ring, low-temperature heating cables and a temperature probe, wherein the anti-spinning disk employs double layer alternating de-spinning disk, the top and bottom surfaces the cartridge element are provided with the shimming ring with inclination angle and shimming ring adjustment sheet of the corresponding number.

Description

Technical field [0001] The invention relates to a medical device, in particular to a permanent magnet type magnet for magnetic resonance imaging equipment for medical diagnosis of the head, limbs and children's whole body. Background technique [0002] Magnets are the key components of magnetic resonance equipment. To develop magnetic resonance equipment, magnets must be developed first. Magnets provide an MRI imaging system with a sufficiently uniform magnetic field in the imaging space. Its performance is directly related to the signal-to-noise ratio of the magnetic resonance equipment system. To a certain extent, it determines the clarity of the image. [0003] The disadvantages of traditional permanent magnets using ferrite magnetic materials are low field strength, heavy weight, bulky, closed and poor practicability. The early 3000 Gauss magnet weighed 100 tons, which brought great inconvenience to the later magnet transportation and installation. With the development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055G01R33/383H01F7/02
Inventor 肖圣前赵世杰陈光燃高大奇
Owner 沈阳东软波谱磁共振技术有限公司
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