Highfield high uniformity nuclear magnetic resonance superconducting magnet system

一种超导磁体、核磁共振的技术，应用在超导磁体/线圈、磁性物体、测量磁变量等方向，能够解决影像学家无法负担等问题，达到良好电磁兼容性、好整体刚性、保证安全性的效果

Active Publication Date: 2011-07-27
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

Under high-resolution and ultra-high magnetic field, more interesting microstructures will be observed, coupled with the original diffusion, perfusion, function, etc., the increase in the amount of information will exceed the simple increase in resolution, and may reach imaging the point where the family can't afford it

Method used

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  • Highfield high uniformity nuclear magnetic resonance superconducting magnet system
  • Highfield high uniformity nuclear magnetic resonance superconducting magnet system
  • Highfield high uniformity nuclear magnetic resonance superconducting magnet system

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] figure 1 Shown is the main structure and spatial configuration of the superconducting magnet system of the present invention. The aperture of the superconducting magnet at room temperature is 800mm, and the length of the superconducting magnet is 3100mm. The superconducting magnet 30 is composed of a main coil 1 and a magnetic field uniformity compensation coil 19, and the main coil 1 and the magnetic field uniformity compensation coil 19 are formed by winding NbTi / Cu superconducting wire. The magnetic field uniformity compensation coil 19 is coaxially wound on the outer surface of the main coil 1 . The main coil 1 is used to provide a main magnetic field of 9.4T. The weight of the superconducting magnet is 25 tons. The superconducting magnet 30 is hoisted and placed inside the cryogenic container 2 through 8 hoisting rods 5. The cryo...

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Abstract

The invention provides a highfield high uniformity nuclear magnetic resonance superconducting magnet system. The highfield high uniformity nuclear magnetic resonance superconducting magnet system comprises a main winding (1) and a magnetic field uniformity compensation winding (19) having a positive and negative current combination; the main winding (1) and the magnetic field uniformity compensation winding (19) consist of 24 superconducting windings coiled by NbTi / Cu low temperature superconducting lines; a 9.4T magnetic field is generated in a room temperature space which is 800 millimeters high, so that the non-uniformity of the magnetic field within the range of 300 millimeters is less than 0.1ppm. A low temperature container (2) of a superconducting magnet and liquid helium (4) is arranged inside the superconducting magnet system, so a 4K low temperature environment required by the normal running of the superconducting magnet can be provided for the superconducting magnet. By a ferromagnetic shielding system, the superconducting magnet has high electromagnetic compatibility. The superconducting magnet system has the advantages of compact structure and low running cost.

Description

technical field [0001] The invention relates to a magnet system for a nuclear magnetic resonance imaging device, in particular to a high magnetic field and high uniformity superconducting magnet system for a nuclear magnetic resonance imaging device. Background technique [0002] A magnetic resonance imaging (MRI) system is mainly composed of a magnet system, a spectrometer system, a computer system and an image display system. Among them, the role of the magnet system is to generate a magnetic field with an unevenness of less than 1ppm within a spherical range of 500mm. At present, the magnetic field strength of the MRI system is generally in the range of 0.35 to 3T, and it has been widely used in hospitals all over the world. The MRI system with a magnetic field higher than 7T is mainly used in scientific research. The strength of the MRI signal has a decisive influence on the image signal-to-noise ratio, and the signal strength has a square relationship with the magneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F6/00H01F6/04H01F6/06A61B5/055
CPCG01R33/421G01R33/3875G01R33/3802G01R33/3815
Inventor 王秋良戴银明赵保志胡新宁严陆光王厚生陈顺中
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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