CN1401295A - Permanent magnet for nuclear magnetic resonance image-forming apparatus - Google Patents
Permanent magnet for nuclear magnetic resonance image-forming apparatus Download PDFInfo
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- CN1401295A CN1401295A CN 01128381 CN01128381A CN1401295A CN 1401295 A CN1401295 A CN 1401295A CN 01128381 CN01128381 CN 01128381 CN 01128381 A CN01128381 A CN 01128381A CN 1401295 A CN1401295 A CN 1401295A
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- permanent magnet
- forming apparatus
- magnetic resonance
- nuclear magnetic
- resonance image
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- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
A permanent magnet for NMR image is characterized by that its two yokes are linked by two vertical columns to form a magnetic loop, the included angle between vertical column and plate electrode is 60-180 deg, and its magnetic field intensity is 1000-3500 G. Its advantages are large open space and high image quality.
Description
The present invention relates to nuclear magnetic resonance image-forming apparatus, more specifically relate 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 objective of the invention is, a kind of permanent magnet that is used for nuclear magnetic resonance image-forming apparatus is provided, this permanent magnet provides bigger open space for doctor and patient, and makes imaging more clear.
To achieve these goals, the present invention adopts following technical scheme:
The present invention 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.
The invention has the advantages that,, formed bigger open space, for doctor and patient provide convenience because the minimum angle at two root posts and pole plate center is 60 °; 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 invention.
Fig. 2 is the structural representation of the present invention's two root posts and pole plate center angle.
Below in conjunction with accompanying drawing, the present invention is further illustrated.
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 |
|---|---|---|---|
| CN 01128381 CN1401295A (en) | 2001-08-29 | 2001-08-29 | Permanent magnet for nuclear magnetic resonance image-forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01128381 CN1401295A (en) | 2001-08-29 | 2001-08-29 | Permanent magnet for nuclear magnetic resonance image-forming apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1401295A true CN1401295A (en) | 2003-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01128381 Pending CN1401295A (en) | 2001-08-29 | 2001-08-29 | Permanent magnet for nuclear magnetic resonance image-forming apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN1401295A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006131060A1 (en) * | 2005-06-10 | 2006-12-14 | Beijing Taijie Yanyuan Medical Engineering Technical Co., Ltd. | Permanent magnet, magnetic device for use in mri including the same and manufanufacturing processes thereof |
| CN100397093C (en) * | 2005-03-31 | 2008-06-25 | 西门子（中国）有限公司 | Irregular measured object shimming method for magnetic resonance equipment |
| CN100568016C (en) * | 2005-06-21 | 2009-12-09 | 中国科学院电工研究所 | The permanent magnet that is used for portable nuclear magnetic resonance instrument |
| CN100568017C (en) * | 2005-09-13 | 2009-12-09 | 中国科学院电工研究所 | A kind of permanent magnet that is used for portable nuclear magnetic resonance instrument magnetostatic field generator |
| CN101191828B (en) * | 2006-11-22 | 2010-07-28 | 北京万东医疗装备股份有限公司 | Full-open permanent magnetism magnetic body for magnetic resonance image-forming |
| CN102110513A (en) * | 2010-12-15 | 2011-06-29 | 东南大学 | Magnetic circuit for detecting chip through nuclear magnetic resonance microscope |
| CN103860178A (en) * | 2014-03-21 | 2014-06-18 | 沈阳中北真空磁电科技有限公司 | Permanent magnet used for nuclear magnetic resonance imager |
| CN105403846A (en) * | 2015-12-02 | 2016-03-16 | 江苏美时医疗技术有限公司 | Shimming assembly of permanent magnet |
| CN108139453A (en) * | 2015-10-26 | 2018-06-08 | 安东内洛·索特奎 | Include the nuclear magnetic resonance magnet assembly of Halbach type cylinder ring |
| WO2022128153A1 (en) * | 2020-12-16 | 2022-06-23 | Giesecke+Devrient Currency Technology Gmbh | Sensor element and device for authenticating a data carrier having a spin resonance feature |
-
2001
- 2001-08-29 CN CN 01128381 patent/CN1401295A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397093C (en) * | 2005-03-31 | 2008-06-25 | 西门子（中国）有限公司 | Irregular measured object shimming method for magnetic resonance equipment |
| WO2006131060A1 (en) * | 2005-06-10 | 2006-12-14 | Beijing Taijie Yanyuan Medical Engineering Technical Co., Ltd. | Permanent magnet, magnetic device for use in mri including the same and manufanufacturing processes thereof |
| CN100568016C (en) * | 2005-06-21 | 2009-12-09 | 中国科学院电工研究所 | The permanent magnet that is used for portable nuclear magnetic resonance instrument |
| CN100568017C (en) * | 2005-09-13 | 2009-12-09 | 中国科学院电工研究所 | A kind of permanent magnet that is used for portable nuclear magnetic resonance instrument magnetostatic field generator |
| CN101191828B (en) * | 2006-11-22 | 2010-07-28 | 北京万东医疗装备股份有限公司 | Full-open permanent magnetism magnetic body for magnetic resonance image-forming |
| CN102110513A (en) * | 2010-12-15 | 2011-06-29 | 东南大学 | Magnetic circuit for detecting chip through nuclear magnetic resonance microscope |
| CN102110513B (en) * | 2010-12-15 | 2013-07-31 | 东南大学 | Magnetic circuit for detecting chip through nuclear magnetic resonance microscope |
| CN103860178A (en) * | 2014-03-21 | 2014-06-18 | 沈阳中北真空磁电科技有限公司 | Permanent magnet used for nuclear magnetic resonance imager |
| CN103860178B (en) * | 2014-03-21 | 2016-04-06 | 沈阳中北真空磁电科技有限公司 | A kind of permanent magnet for nuclear magnetic resonance imaging instrument |
| CN108139453A (en) * | 2015-10-26 | 2018-06-08 | 安东内洛·索特奎 | Include the nuclear magnetic resonance magnet assembly of Halbach type cylinder ring |
| CN105403846A (en) * | 2015-12-02 | 2016-03-16 | 江苏美时医疗技术有限公司 | Shimming assembly of permanent magnet |
| WO2022128153A1 (en) * | 2020-12-16 | 2022-06-23 | Giesecke+Devrient Currency Technology Gmbh | Sensor element and device for authenticating a data carrier having a spin resonance feature |
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| SE01 | Entry into force of request for substantive examination | ||
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |