CN2493161Y - Permanent magnet for nuclear magnetic resonacne (NMR) imaging instrument - Google Patents
Permanent magnet for nuclear magnetic resonacne (NMR) imaging instrument Download PDFInfo
- Publication number
- CN2493161Y CN2493161Y CN01251705U CN01251705U CN2493161Y CN 2493161 Y CN2493161 Y CN 2493161Y CN 01251705 U CN01251705 U CN 01251705U CN 01251705 U CN01251705 U CN 01251705U CN 2493161 Y CN2493161 Y CN 2493161Y
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- Prior art keywords
- permanent magnet
- nuclear magnetic
- pole plate
- gausses
- magnetic field
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Abstract
The utility model provides a permanent magnet used for a nuclear magnetic resonance imager. Two standing posts are used to link two yoke irons of the permanent magnet. The magnetic field forms a magnetic loop through the standing posts. The angle between the two standing posts and the center of a pole plate can be 60 degrees to 180 degrees. The intensity of magnetic field can be from 1000 gausses to 3500 gausses, which forms an open space at the larger limit. Because the use of a vortex compensator and the improvement of the intensity of the magnetic field, the image quality is better, and the inspection result is more satisfying. The permanent magnet is an ideal applied product of a low field nuclear magnetic resonance imager.
Description
This utility model relates to nuclear magnetic resonance image-forming apparatus, more specifically relates to the permanent magnet that is used for nuclear magnetic resonance image-forming apparatus.
Nuclear magnetic resonance image-forming apparatus is with a wide range of applications, and especially in the medical diagnosis field, nuclear magnetic resonance image-forming apparatus has become the important means of some diseases diagnosis.Permanent magnet then is the core component of nuclear magnetic resonance image-forming apparatus, and the image quality of nuclear magnetic resonance image-forming apparatus is played conclusive effect.In the permanent magnet of existing nuclear magnetic resonance image-forming apparatus, comparatively advanced with the two column permanent magnets that U.S. PICKER company produces, two root posts of this permanent magnet and the angle at pole plate center are 120 degree, its two columns magnet detection district magnetic field intensity is up to 3000 Gausses, and its weak point is that the openness of permanent magnet is big inadequately, make the width of sick bed narrow, influence medical personnel's clinical manipulation, in addition, the magnetic field intensity that improves two column magnet detection districts can improve the image quality of nuclear magnetic resonance image-forming apparatus.
The purpose of this utility model is, a kind of permanent magnet that is used for nuclear magnetic resonance image-forming apparatus is provided, and this permanent magnet provides bigger open space for doctor and patient, and makes imaging more clear.
To achieve these goals, this utility model adopts following technical scheme:
This utility model comprises yoke (1-1 '), magnet steel (2-2 '), pole plate (3-3 '), cross current compensator (4-4 '), grading ring (5-5 '), column (6-6 ').Two yokes of permanent magnet connect with two root posts, and the angle at two root posts and pole plate center can be designed to 60 °～180 ° as required, is embedded with a cross current compensator in pole plate, and the magnetic field intensity of detection zone can be designed to 1000～3500 Gausses as required.
Advantage of the present utility model is, because the minimum angle at two root posts and pole plate center is 60 °, formed bigger open space, for doctor and patient provide convenience; Because the maximum magnetic field strength of detection zone can reach 3500 Gausses, adds the use of cross current compensator, makes that the nuclear-magnetism imaging is more clear.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of this utility model two root posts and pole plate center angle.
Below in conjunction with accompanying drawing, this utility model is further described.
According to Fig. 1, two yoke 1-1 ' of permanent magnet are connected by two root post 6-6 ', form the detection zone 7 of an opening, magnet steel 2-2 ' adopts neodymium-iron-boron magnetic material, cement on the yoke 1-1 ' with seccotine, constitute magnetic loop by column 6-6 ', pole plate 3-3 ' is fastened on the magnet steel 2-2 ', a grading ring 5-5 ' is arranged on the pole plate 3-3 ', and the effect of grading ring is to make the magnetic field of detection zone 7 more even.In the middle of pole plate, bank is gone into cross current compensator 4-4 ', and this compensator can be eliminated the harmful effect that image quality is brought owing to the eddy current effect that high-power gradient current produced.
According to Fig. 2,1 is yoke, and two root post 6-6 ' of permanent magnet are θ with the angle at pole plate 3-3 ' center.
Because pole plate 3 and pole plate 3 ' two root post 6-6 ' centrosymmetry together, therefore, two root post 6-6 ' also are θ with the angle at pole plate 3 ' center.
Claims (1)
1, a kind of permanent magnet that is used for nuclear magnetic resonance image-forming apparatus, this permanent magnet comprises yoke (1-1 '), magnet steel (2-2 '), pole plate (3-3 '), cross current compensator (4-4 '), grading ring (5-5 '), column (6-6 '), two yokes (1-1 ') and two root posts (6-6 ') be connected, it is characterized in that, in pole plate (3-3 '), be embedded with a cross current compensator (4-4 '), the angle at two root posts (6-6 ') and pole plate (3-3 ') center can be 60 and spends arbitrarily angled between 120 degree, and the magnetic field intensity of magnet detection district (7) can be 1000 Gausses to any intensity between 3500 Gausses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01251705U CN2493161Y (en) | 2001-08-29 | 2001-08-29 | Permanent magnet for nuclear magnetic resonacne (NMR) imaging instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01251705U CN2493161Y (en) | 2001-08-29 | 2001-08-29 | Permanent magnet for nuclear magnetic resonacne (NMR) imaging instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2493161Y true CN2493161Y (en) | 2002-05-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01251705U Expired - Lifetime CN2493161Y (en) | 2001-08-29 | 2001-08-29 | Permanent magnet for nuclear magnetic resonacne (NMR) imaging instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2493161Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399479C (en) * | 2004-04-05 | 2008-07-02 | 北京大学 | Permanent magnet used for portable NMR appts. |
| CN101825692A (en) * | 2009-03-02 | 2010-09-08 | 绵阳西磁磁电有限公司 | High-field-intensity focusing nuclear magnetic resonance magnetic field and preparation method thereof |
| CN104215921A (en) * | 2013-05-30 | 2014-12-17 | 北京大学 | Fixed-gradient NMR (nuclear magnetic resonance) magnet |
| CN105390229A (en) * | 2015-12-10 | 2016-03-09 | 沈阳东软医疗系统有限公司 | Permanent magnet and magnetic apparatus for nuclear magnetic resonance imaging system |
-
2001
- 2001-08-29 CN CN01251705U patent/CN2493161Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399479C (en) * | 2004-04-05 | 2008-07-02 | 北京大学 | Permanent magnet used for portable NMR appts. |
| CN101825692A (en) * | 2009-03-02 | 2010-09-08 | 绵阳西磁磁电有限公司 | High-field-intensity focusing nuclear magnetic resonance magnetic field and preparation method thereof |
| CN104215921A (en) * | 2013-05-30 | 2014-12-17 | 北京大学 | Fixed-gradient NMR (nuclear magnetic resonance) magnet |
| CN105390229A (en) * | 2015-12-10 | 2016-03-09 | 沈阳东软医疗系统有限公司 | Permanent magnet and magnetic apparatus for nuclear magnetic resonance imaging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENYANG DONGRUAN SPECTROSCOPY MAGNETIC RESONANCE Free format text: FORMER OWNER: WUHAN INST. OF PHYSICS AND MATHEMATICS, CHINESE ACADEMY OF SCIENCES Effective date: 20040220 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20040220 Address after: 110179 Liaoning city of Shenyang province high tech Zone Building Road No. 149 Patentee after: Dongruan Spectrum Magnetic Resonance Technology Co., Ltd., Shenyang City Address before: 430071 small Hongshan, Wuhan, Hubei, Wuchang Patentee before: Wuhan Inst. of Physics and Mathematics, Chinese Academy of Sciences |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110829 Granted publication date: 20020529 |