JP2533758Y2 - 磁場発生装置 - Google Patents

磁場発生装置

Info

Publication number
JP2533758Y2
JP2533758Y2 JP1989143987U JP14398789U JP2533758Y2 JP 2533758 Y2 JP2533758 Y2 JP 2533758Y2 JP 1989143987 U JP1989143987 U JP 1989143987U JP 14398789 U JP14398789 U JP 14398789U JP 2533758 Y2 JP2533758 Y2 JP 2533758Y2
Authority
JP
Japan
Prior art keywords
magnetic field
pole piece
uniformity
iron
permanent magnets
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
Application number
JP1989143987U
Other languages
English (en)
Japanese (ja)
Other versions
JPH0383903U (US07345094-20080318-C00003.png
Inventor
浩二 宮田
Original Assignee
信越化学工業 株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 信越化学工業 株式会社 filed Critical 信越化学工業 株式会社
Priority to JP1989143987U priority Critical patent/JP2533758Y2/ja
Priority to DE69030715T priority patent/DE69030715T2/de
Priority to EP90123905A priority patent/EP0432750B1/en
Priority to US07/627,145 priority patent/US5089798A/en
Publication of JPH0383903U publication Critical patent/JPH0383903U/ja
Application granted granted Critical
Publication of JP2533758Y2 publication Critical patent/JP2533758Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G01R33/387—Compensation of inhomogeneities
    • G01R33/3873—Compensation of inhomogeneities using ferromagnetic bodies ; Passive shimming

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
JP1989143987U 1989-12-13 1989-12-13 磁場発生装置 Expired - Lifetime JP2533758Y2 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1989143987U JP2533758Y2 (ja) 1989-12-13 1989-12-13 磁場発生装置
DE69030715T DE69030715T2 (de) 1989-12-13 1990-12-12 Apparat zur Erzeugung eines gleichförmigen Magnetfeldes unter Verwendung von sphärischen Metallteilen kleinen Durchmessers auf den Magnetpolen
EP90123905A EP0432750B1 (en) 1989-12-13 1990-12-12 Apparatus for generating uniform magnetic field using small diameter spherical metallic members provided on magnetic poles
US07/627,145 US5089798A (en) 1989-12-13 1990-12-13 Apparatus for generating uniform magnetic field using small diameter spherical metallic members provided on magnetic poles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989143987U JP2533758Y2 (ja) 1989-12-13 1989-12-13 磁場発生装置

Publications (2)

Publication Number Publication Date
JPH0383903U JPH0383903U (US07345094-20080318-C00003.png) 1991-08-26
JP2533758Y2 true JP2533758Y2 (ja) 1997-04-23

Family

ID=15351672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989143987U Expired - Lifetime JP2533758Y2 (ja) 1989-12-13 1989-12-13 磁場発生装置

Country Status (4)

Country Link
US (1) US5089798A (US07345094-20080318-C00003.png)
EP (1) EP0432750B1 (US07345094-20080318-C00003.png)
JP (1) JP2533758Y2 (US07345094-20080318-C00003.png)
DE (1) DE69030715T2 (US07345094-20080318-C00003.png)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285393A (en) * 1991-11-19 1994-02-08 New York University Method for determination of optimum fields of permanent magnet structures with linear magnetic characteristics
JP2767659B2 (ja) * 1991-12-17 1998-06-18 信越化学工業株式会社 磁場発生装置
JP3123731B2 (ja) * 1993-02-19 2001-01-15 株式会社日立メディコ 磁気共鳴イメージング装置の磁界発生装置
JP2757104B2 (ja) * 1993-04-01 1998-05-25 信越化学工業株式会社 磁場発生装置
GB2276946B (en) * 1993-04-08 1997-04-02 Oxford Magnet Tech Improvements in or relating to MRI magnets
JPH07106155A (ja) * 1993-05-26 1995-04-21 General Electric Co <Ge> Ｃ字形超伝導磁石
FI933834A (fi) * 1993-09-01 1995-03-02 Picker Nordstar Oy Magneettikuvauslaitteen napakenkä
DE69419096T2 (de) * 1993-09-29 1999-10-28 Oxford Magnet Technology Ltd., Eynsham Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz
GB9320043D0 (en) * 1993-09-29 1993-11-17 Oxford Magnet Rechnology Limit Improvements in or relating to mri magnets
US5864275A (en) * 1995-08-28 1999-01-26 Shin-Etsu Chemical Co., Ltd Opposed magnet-type magnetic circuit assembly with permanent magnets
US6163154A (en) * 1997-12-23 2000-12-19 Magnetic Diagnostics, Inc. Small scale NMR spectroscopic apparatus and method
US5942962A (en) * 1998-10-02 1999-08-24 Quadrant Technology Dipole magnetic structure for producing uniform magnetic field
US6124710A (en) * 1998-11-13 2000-09-26 Cts Corporation Rotary magnetic encoder using hall effect for detecting revolution of a shaft
US6288534B1 (en) 1999-02-10 2001-09-11 Cts Corporation Non-contacting throttle valve position sensor
WO2001053847A1 (en) 2000-01-19 2001-07-26 Millennium Technology Inc. C-shaped magnetic resonance imaging system
US6566991B1 (en) * 2001-04-24 2003-05-20 Fonar Corporation Apparatus and method of shimming a magnetic field
US6778054B1 (en) * 2003-10-03 2004-08-17 General Electric Company Methods and apparatus for passive shimming of magnets
JP2005168692A (ja) * 2003-12-10 2005-06-30 Shin Etsu Chem Co Ltd 永久磁石対向型磁気回路およびその磁場を調整する方法
US20210110966A1 (en) * 2019-10-09 2021-04-15 Power Integrations, Inc. Magnet with multiple discs

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114889A1 (en) * 1982-08-04 1984-08-08 OLDENDORF, William H. Adjustable magnet suitable for in vivo nmr imaging and method of adjusting the same
JPS60166111U (ja) * 1984-04-11 1985-11-05 住友特殊金属株式会社 磁界発生装置
DE3566185D1 (en) * 1984-04-11 1988-12-15 Sumitomo Spec Metals Magnetic field generating device for nmr-ct
JPS60239005A (ja) * 1984-05-11 1985-11-27 Sumitomo Special Metals Co Ltd 磁界発生装置
DE3518852A1 (de) * 1985-05-23 1986-11-27 Siemens AG, 1000 Berlin und 8000 München Magnet eines kernspintomographen
EP0262880B1 (en) * 1986-09-27 1992-06-10 Sumitomo Special Metals Co. Ltd. Magnetic field generating device for nmr-ct
EP0303880B1 (de) * 1987-08-14 1991-11-06 Siemens Aktiengesellschaft Elektrischer Magnet für Kernspin-Thomographen
JPH01164356A (ja) * 1987-12-22 1989-06-28 Asahi Chem Ind Co Ltd 均一磁界の発生装置
JPH03131234A (ja) * 1989-07-07 1991-06-04 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置

Also Published As

Publication number Publication date
JPH0383903U (US07345094-20080318-C00003.png) 1991-08-26
EP0432750A3 (en) 1991-11-06
DE69030715T2 (de) 1997-11-27
EP0432750A2 (en) 1991-06-19
US5089798A (en) 1992-02-18
DE69030715D1 (de) 1997-06-19
EP0432750B1 (en) 1997-05-14

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