Magnetic resonance superconducting magnet for joint imaging

A technology of superconducting magnets and magnetic resonance, applied in the field of superconducting applications, can solve problems such as abnormal operation of computer systems, life-threatening problems of patients with cardiac pacemakers, and electronic equipment that cannot work normally.

Inactive Publication Date: 2015-11-25
北京斯派克科技发展有限公司
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  • Claims
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Problems solved by technology

[0004] Because the leakage magnetic field distributed outside the superconducting magnet system will have adverse effects on the surrounding environment, such as a magnetic field of the order of 10 Gauss, it may cause some electronic equipment to malfunction, and make patients w...

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  • Magnetic resonance superconducting magnet for joint imaging
  • Magnetic resonance superconducting magnet for joint imaging
  • Magnetic resonance superconducting magnet for joint imaging

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Embodiment Construction

[0018] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] figure 1 It is a schematic structural diagram of a superconducting magnet according to an embodiment of the present invention. Such as figure 1 As shown, the superconducting magnet is composed of superconducting forward coils 1, 2, 4 and superconducting reverse coil 3. The superconducting forward coils 1, 2, and 4 are three pairs of solenoid coils with forward current, and the superconducting reverse coil 3 is a pair of solenoid coils with reverse current. Direction coils 1, 2, 4 and superconducting reverse coil 3 are installed in the pre-arranged coil space 5, the section of the pre-arranged coil space 5 is rectangular, the axial position of the rectangle is -0.21m≤z≤0.21m, and the diameter The orientation position is 0.18m≤r≤0.224m. Coils 1, 2, 3, and 4 are arranged symmetrically with respect to the plane of symmetry 6...

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Abstract

The invention provides a magnetic resonance superconducting magnet for joint imaging. The superconducting magnet consists of superconducting positive coils (1, 2, 4) and superconducting negative coils (3), and all the coils are respectively axially-symmetrical solenoid coils taking a symmetry axis (7) as a center shaft. The superconducting positive coils (1, 2, 4) and the superconducting negative coils (3) are respectively arranged symmetrical about a symmetry plane (6), and are wound on the same skeleton; the superconducting magnet generates highly uniform magnetic field distribution in concentric spherical areas (8, 9, 10 and 11) with the four diameters of 100 mm, 120 mm, 140 mm and 160 mm respectively at central positions; and five Gaussian stray magnetic fields are respectively restricted in the ellipsoid ranges of 2.8 m and 3.8 m in the radial direction and the axial direction respectively. The magnetic resonance superconducting magnet for joint imaging adopts a single-skeleton structure, the assembly error of the magnet is reduced, and the liquid helium cavity volume of the superconducting magnet is reduced, and the using amount of liquid helium can be controlled within 30 liters.

Description

technical field [0001] The invention belongs to the technical field of applied superconductivity, and in particular relates to a magnetic resonance imaging superconducting magnet. Background technique [0002] Magnetic resonance imaging (MRI) is a high-tech imaging technology that utilizes the NMR properties of the magnetic nuclei (mainly hydrogen nuclei) of organisms in a magnetic field. Magnetic resonance imaging (MRI) equipment is mainly composed of a main magnet, a scanning bed, a gradient coil, a radio frequency coil, a spectrometer system, a control cabinet, a man-machine dialogue console, a computer, and an image processor. [0003] The main magnet is the main component of the MRI equipment, which is used to generate a uniform static magnetic field, which determines the image quality and work efficiency of the MRI equipment. At the same time, the main magnet is also the part with the largest manufacturing cost and the highest operating cost in the MRI equipment. MRI...

Claims

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Application Information

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IPC IPC(8): H01F6/00H01F6/06G01R33/3815
Inventor 林海洋
Owner 北京斯派克科技发展有限公司
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