Magnet device and measuring device for magnetic resonance imaging

A technology of magnets and magnetic materials, applied in the field of medical devices, can solve problems such as difficulty in obtaining a high uniformity magnetic field, and achieve the effects of uniform magnetic field and cost reduction

Active Publication Date: 2016-08-24
XBO MEDICAL SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the shape changes, it is difficult to obtain a high uniformity of the magnetic field

Method used

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  • Magnet device and measuring device for magnetic resonance imaging
  • Magnet device and measuring device for magnetic resonance imaging
  • Magnet device and measuring device for magnetic resonance imaging

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Embodiment Construction

[0022] The magnet device and the measuring device for measuring the magnetic induction of the magnet device of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] image 3 is a side view of a magnet device according to an embodiment of the present invention. The magnet device according to the present invention is used for magnetic resonance imaging, and the magnet device includes an upper yoke 5 and a lower yoke facing each other in the Z-axis direction, and the upper yoke and the lower yoke are sequentially provided with The permanent magnetic material 6, the pole plate 7 and the shim ring 8, the shim ring 8 is arranged to surround the pole plate 7, so that a magnetic field is formed between the two pole plates. Each of the permanent magnet material 6 , pole plates 7 and shim rings 8 is arranged to have a non-circular symmetrical shape, thereby forming a magnetic field homogenization zone 9 wi...

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Abstract

The invention provides a magnet device for magnetic resonance imaging and a measuring device thereof, the magnet device includes an upper yoke and a lower yoke facing each other in the Z-axis direction, the upper yoke and the lower yoke A permanent magnet material, a polar plate and a shim ring are sequentially arranged on the iron, and the shim ring is arranged to surround the polar plate, thereby forming a magnetic field between the two polar plates. Each of the permanent magnet material, pole plates and shim rings is arranged to have a non-circular symmetrical shape, thereby forming a uniform magnetic field with a symmetrical shape between the two pole plates, wherein the Z-axis direction is perpendicular to the pole plates direction. The present invention also simultaneously provides a measuring device for measuring the magnetic induction intensity of the magnet device. The use of the invention reduces the cost, volume and weight of the magnet device, and also provides a basis for the application of magnetic resonance to expand from sub-part diagnosis to whole-body physical examination.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a magnet device for magnetic resonance imaging and a measuring device for measuring the magnetic induction of the magnet device. Background technique [0002] Magnetic resonance imaging (MRI) equipment is one of the greatest inventions of the last century. It can be used to scan almost every part of the human body. It has no ionizing radiation damage to the human body, and the soft tissue structure is clearly displayed. It can be used for disease diagnosis in various parts of the body. [0003] Magnet is a core component in MRI equipment, which is used to generate the main magnetic field necessary for magnetic resonance imaging. There are three types of magnets currently used in clinical magnetic resonance imaging equipment: permanent magnets, constant conduction magnets, and superconducting magnets. Among them, the operation and maintenance costs of permanent magnets are low, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F7/02G01R33/12
Inventor 刘景顺王振孟洪卫王剑杨杰蒋宁
Owner XBO MEDICAL SYST
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