An Open Self-Shielding Magnetic Resonance Imaging Split Superconducting Magnet System
A technology for magnetic resonance imaging and superconducting magnets, applied in superconducting magnets/coils, magnetic objects, measuring magnetic variables, etc., and can solve problems such as insufficient openness
Active Publication Date: 2015-10-14
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0016] figure 1 It is the coil structure diagram of the superconducting magnet system of the present invention. Such as figure 1 As shown, the split superconducting magnet system consists of superconducting main coil 3, superconducting correction coil 4, superconducting shielding coil 5, split shim iron sheet 11, split room temperature shim coil 12, split gradient coil 13, The left cryogenic container 1 and the right cryogenic container 2 are composed.
[0017] Both the left cryogenic container 1 and the right cryogenic container 2 are equipped with the superconducting main coil, superconducting rectifying coil 4 and superconducting shielding coil 5 . Both the left cryogenic container 1 and the right cryogenic container 2 are hollow planar containers, both of which take the axis of symmetry 9 as the central axis and are symmetrically arrange...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| radius | aaaaa | aaaaa |
Login to View More
Abstract
Disclosed is an open type self-shielding magnetic resonance imaging split superconducting magnet system. Main superconducting coils, correcting superconducting coils (4) and shielding superconducting coils (5) in the superconducting magnet system are mounted in a left low-temperature container (1) and a right low-temperature container (2) respectively, split shimming iron sheets (11),split room-temperature shimming coils (12) and split gradient coils (13) are mounted on three cylindrical surfaces in room-temperature holes of the superconducting magnet system, and the three cylindrical surfaces are in positive symmetry with one another around a symmetry plane. The main superconducting coils, the correcting superconducting coils (4) and the shielding superconducting coils (5) jointly generate a magnetic field with the central magnetic field intensity of 0.7T, magnetic field distribution with the magnetic field peak value unevenness of 10ppm is generated in a spherical imaging region (15) with the center diameter of 50cm, and a 5-Gausian stray field is respectively limited within ellipsoid ranges with sizes of 3.5m and 4.0m respectively in axial and radial directions.
Description
technical field [0001] The invention relates to an open self-shielding magnetic resonance imaging superconducting magnet system. Background technique [0002] Magnetic resonance imaging (Magnetic Resonance Imaging, MRI) generally needs to generate a highly uniform magnetic field distribution with a peak magnetic field uniformity better than 20ppm (parts per million, ppm) within a sphere with a diameter of 40-50cm. Magnetic resonance imaging equipment is generally a hollow solenoid structure, and the hollow cylindrical room temperature hole space provided by the magnet system can provide patients with diagnostic needs. When the patient undergoes magnetic resonance imaging, he needs to enter the central magnetic field uniform area from one end of the long and narrow hollow cylinder area. A large number of clinical experiments have shown that patients generally suffer from claustrophobia such as nervousness and restlessness when undergoing MRI diagnosis. Therefore, open MRI te...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/00H01F6/04H01F6/06G01R33/3815
Inventor 倪志鹏王秋良严陆光
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI