JPH0223010B2 - - Google Patents
Info
- Publication number
- JPH0223010B2 JPH0223010B2 JP58196785A JP19678583A JPH0223010B2 JP H0223010 B2 JPH0223010 B2 JP H0223010B2 JP 58196785 A JP58196785 A JP 58196785A JP 19678583 A JP19678583 A JP 19678583A JP H0223010 B2 JPH0223010 B2 JP H0223010B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- magnetic
- magnetic pole
- permanent magnet
- annular protrusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005481 NMR spectroscopy Methods 0.000 claims description 5
- 238000003325 tomography Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000011800 void material Substances 0.000 claims 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910000828 alnico Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/383—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58196785A JPS6088407A (ja) | 1983-10-19 | 1983-10-19 | 永久磁石式磁界発生装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58196785A JPS6088407A (ja) | 1983-10-19 | 1983-10-19 | 永久磁石式磁界発生装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6088407A JPS6088407A (ja) | 1985-05-18 |
| JPH0223010B2 true JPH0223010B2 (US07922777-20110412-C00004.png) | 1990-05-22 |
Family
ID=16363593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58196785A Granted JPS6088407A (ja) | 1983-10-19 | 1983-10-19 | 永久磁石式磁界発生装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6088407A (US07922777-20110412-C00004.png) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0691548A1 (en) | 1994-07-08 | 1996-01-10 | Sumitomo Special Metals Company Limited | Magnetic field generating device for use in MRI |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4827235A (en) * | 1986-07-18 | 1989-05-02 | Kabushiki Kaisha Toshiba | Magnetic field generator useful for a magnetic resonance imaging instrument |
| US4931760A (en) * | 1986-10-08 | 1990-06-05 | Asahi Kasei Kogyo Kabushiki Kaisha | Uniform magnetic field generator |
| EP0479514B1 (en) | 1990-09-29 | 1998-07-01 | Sumitomo Special Metals Co., Ltd. | Magnetic field generating device used for MRI |
| US10446307B2 (en) * | 2017-05-23 | 2019-10-15 | AOSense, Inc. | Magnetic field generators based on high magnetic permeability materials |
-
1983
- 1983-10-19 JP JP58196785A patent/JPS6088407A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0691548A1 (en) | 1994-07-08 | 1996-01-10 | Sumitomo Special Metals Company Limited | Magnetic field generating device for use in MRI |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6088407A (ja) | 1985-05-18 |
