DE69419096D1 - Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz - Google Patents

Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz

Info

Publication number
DE69419096D1
DE69419096D1 DE69419096T DE69419096T DE69419096D1 DE 69419096 D1 DE69419096 D1 DE 69419096D1 DE 69419096 T DE69419096 T DE 69419096T DE 69419096 T DE69419096 T DE 69419096T DE 69419096 D1 DE69419096 D1 DE 69419096D1
Authority
DE
Germany
Prior art keywords
magnetic resonance
resonance imaging
imaging enhancements
enhancements
magnetic
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 - Fee Related
Application number
DE69419096T
Other languages
English (en)
Other versions
DE69419096T2 (de
Inventor
Jonathan Leslie Allis
Robin Thomas Elliott
Alan George Andre Ma Armstrong
Michael Ben Sellers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Magnet Technology Ltd
Original Assignee
Oxford Magnet Technology Ltd
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
Priority claimed from GB939320043A external-priority patent/GB9320043D0/en
Application filed by Oxford Magnet Technology Ltd filed Critical Oxford Magnet Technology Ltd
Application granted granted Critical
Publication of DE69419096D1 publication Critical patent/DE69419096D1/de
Publication of DE69419096T2 publication Critical patent/DE69419096T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • 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
DE69419096T 1993-09-29 1994-09-12 Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz Expired - Fee Related DE69419096T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939320043A GB9320043D0 (en) 1993-09-29 1993-09-29 Improvements in or relating to mri magnets
GB9417541A GB2282451B (en) 1993-09-29 1994-09-01 Improvements in or relating to MRI magnets

Publications (2)

Publication Number Publication Date
DE69419096D1 true DE69419096D1 (de) 1999-07-22
DE69419096T2 DE69419096T2 (de) 1999-10-28

Family

ID=26303594

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69419096T Expired - Fee Related DE69419096T2 (de) 1993-09-29 1994-09-12 Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz

Country Status (4)

Country Link
US (1) US5680086A (de)
EP (1) EP0645641B1 (de)
JP (1) JP3548240B2 (de)
DE (1) DE69419096T2 (de)

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GB2341449B (en) * 1998-09-11 2003-03-26 Oxford Magnet Tech Stabilisation of a magnetic field of a magnetic reasonance imaging apparatus
US6150819A (en) * 1998-11-24 2000-11-21 General Electric Company Laminate tiles for an MRI system and method and apparatus for manufacturing the laminate tiles
US6259252B1 (en) 1998-11-24 2001-07-10 General Electric Company Laminate tile pole piece for an MRI, a method manufacturing the pole piece and a mold bonding pole piece tiles
GB2355800B (en) * 1999-10-29 2004-10-27 Oxford Magnet Tech Improved magnet
US6252405B1 (en) 1999-11-15 2001-06-26 General Electric Company Temperature compensated NMR magnet and method of operation therefor
US6288624B1 (en) * 1999-11-23 2001-09-11 Picker Nordstar Corporation Enlongated field of view open magnetic resonance imaging system with dipole magnet
JP3705995B2 (ja) * 2000-04-19 2005-10-12 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー 勾配コイル製造方法および勾配コイル並びに磁気共鳴撮影装置
US6518867B2 (en) 2001-04-03 2003-02-11 General Electric Company Permanent magnet assembly and method of making thereof
US6662434B2 (en) 2001-04-03 2003-12-16 General Electric Company Method and apparatus for magnetizing a permanent magnet
WO2002087543A1 (en) * 2001-05-01 2002-11-07 Biozone Laboratories, Inc. Sustained release formulations for nifedipine, dextromethorphan, and danazol
US6825666B2 (en) * 2002-12-23 2004-11-30 General Electric Company Pole face for permanent magnet MRI with laminated structure
JP4051301B2 (ja) * 2003-02-12 2008-02-20 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー 円形ポールピースおよびｍｒｉ装置
JP2004261585A (ja) * 2003-02-12 2004-09-24 Ge Medical Systems Global Technology Co Llc 円形ポールピース、積層ブロックの製造方法およびｍｒｉ装置
CN100434928C (zh) * 2003-05-23 2008-11-19 西门子（中国）有限公司 一种可用于磁共振设备的磁场发生系统
US7015692B2 (en) * 2003-08-07 2006-03-21 Ge Electric Company Apparatus for active cooling of an MRI patient bore in cylindrical MRI systems
US20050062572A1 (en) * 2003-09-22 2005-03-24 General Electric Company Permanent magnet alloy for medical imaging system and method of making
US7148689B2 (en) 2003-09-29 2006-12-12 General Electric Company Permanent magnet assembly with movable permanent body for main magnetic field adjustable
US7423431B2 (en) * 2003-09-29 2008-09-09 General Electric Company Multiple ring polefaceless permanent magnet and method of making
US7218195B2 (en) * 2003-10-01 2007-05-15 General Electric Company Method and apparatus for magnetizing a permanent magnet
US7081753B2 (en) * 2004-07-26 2006-07-25 Varian, Inc. Multiple tuned scroll coil
US7560928B2 (en) * 2004-09-27 2009-07-14 Fonar Corporation Magnetic resonance imaging system, apparatus and associated methods
US7295012B1 (en) * 2006-04-28 2007-11-13 General Electric Company Methods and apparatus for MRI shim elements
US20100219833A1 (en) 2007-07-26 2010-09-02 Emscan Limited Magnet assembly
IL196487A (en) * 2009-01-13 2016-03-31 Aspect Imaging Ltd Means for buying sharp resolution mri
US20110234347A1 (en) * 2010-03-24 2011-09-29 Aspect Magnet Technologies Ltd. Pole piece for permanent magnet mri systems
EP2748623B1 (de) * 2011-12-02 2016-09-07 Koninklijke Philips N.V. Spulenanordnung für mpi
CN103860178B (zh) * 2014-03-21 2016-04-06 沈阳中北真空磁电科技有限公司 一种用于核磁共振成像仪的永磁体
DE102015202165B3 (de) * 2015-02-06 2016-05-04 Siemens Aktiengesellschaft Gradientenspulenanordnung, Magnetresonanzeinrichtung und Verfahren zur Bedämpfung einer Gradientenspulenanordnung
US20210349165A1 (en) * 2018-10-19 2021-11-11 Koninklijke Philips N.V. Fast quench protection for low copper to superconducting wire coils
US10945631B2 (en) 2019-07-18 2021-03-16 Sigwa Company, Llc Magnet assembly for magnetic resonance imaging (MRI) scanning system
DE102020007707A1 (de) 2020-12-16 2022-06-23 Giesecke+Devrient Currency Technology Gmbh Sensorelement und Vorrichtung für die Echtheitsprüfung eines Datenträgers mit einem Spinresonanz-Merkmal
EP4019995B1 (de) * 2020-12-22 2023-08-16 Bruker BioSpin GmbH Epr-spektrometer mit mindestens einem zumindest teilweise aus einem funktionsmaterial hergestellten polstück
JP2023005490A (ja) * 2021-06-29 2023-01-18 富士フイルムヘルスケア株式会社 磁気共鳴イメージング装置
DE102021005262A1 (de) 2021-10-21 2023-04-27 Giesecke+Devrient Currency Technology Gmbh Sensorelement für die Prüfung eines Datenträgers mit Spinresonanz-Merkmal, Justageverfahren und Herstellungsverfahren
DE102021005253A1 (de) 2021-10-21 2023-04-27 Giesecke+Devrient Currency Technology Gmbh Sensorelement für die Prüfung eines Datenträgers mit Spinresonanz-Merkmal, Zerlegeverfahren, Montageverfahren und Prüfverfahren

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US4827235A (en) * 1986-07-18 1989-05-02 Kabushiki Kaisha Toshiba Magnetic field generator useful for a magnetic resonance imaging instrument
JPS63241905A (ja) * 1987-03-27 1988-10-07 Sumitomo Special Metals Co Ltd 磁界発生装置
DE3719306A1 (de) * 1987-06-10 1988-12-22 Bruker Analytische Messtechnik Magnet fuer nmr-tomographen und verfahren zu seiner herstellung
JPH01104252A (ja) * 1987-10-16 1989-04-21 Sanyo Electric Co Ltd 磁気共鳴撮像装置
JPH02246927A (ja) * 1989-03-20 1990-10-02 Hitachi Medical Corp 磁気共鳴イメージング装置の磁界発生装置
DE69018303T2 (de) * 1989-04-17 1995-11-09 Ngk Insulators Ltd Supraleitende Struktur zur magnetischen Abschirmung.
JPH03131234A (ja) * 1989-07-07 1991-06-04 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置
DE4037894A1 (de) * 1989-12-11 1991-06-13 Siemens Ag Kernspintomograph
JP2533758Y2 (ja) * 1989-12-13 1997-04-23 信越化学工業 株式会社 磁場発生装置
US5061897A (en) * 1990-03-23 1991-10-29 Fonar Corporation Eddy current control in magnetic resonance imaging
JP2808198B2 (ja) * 1990-07-02 1998-10-08 住友特殊金属株式会社 Ｍｒｉ用磁界発生装置とその製法
SG43224A1 (en) * 1990-09-29 1997-10-17 Sumitomo Spec Metals Magnetic field generating device used for MRI
US5124651A (en) * 1990-10-24 1992-06-23 Fonar Corporation Nuclear magnetic resonance scanners with composite pole facings
JPH04196109A (ja) * 1990-11-26 1992-07-15 Seiko Epson Corp 磁界発生装置
US5495171A (en) * 1993-01-19 1996-02-27 Fonar Corporation Eddy current control in NMR imaging systems

Also Published As

Publication number Publication date
JP3548240B2 (ja) 2004-07-28
US5680086A (en) 1997-10-21
DE69419096T2 (de) 1999-10-28
EP0645641A1 (de) 1995-03-29
JPH07163546A (ja) 1995-06-27
EP0645641B1 (de) 1999-06-16

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee