SG43224A1 - Magnetic field generating device used for MRI - Google Patents

Magnetic field generating device used for MRI

Info

Publication number
SG43224A1
SG43224A1 SG1996005853A SG1996005853A SG43224A1 SG 43224 A1 SG43224 A1 SG 43224A1 SG 1996005853 A SG1996005853 A SG 1996005853A SG 1996005853 A SG1996005853 A SG 1996005853A SG 43224 A1 SG43224 A1 SG 43224A1
Authority
SG
Singapore
Prior art keywords
mri
magnetic field
generating device
device used
field generating
Prior art date
Application number
SG1996005853A
Other languages
English (en)
Inventor
Hedeya Sakurai
Masaaki Aoki
Original Assignee
Sumitomo Spec Metals
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 JP2261418A external-priority patent/JP2649437B2/ja
Priority claimed from JP2261417A external-priority patent/JP2649436B2/ja
Application filed by Sumitomo Spec Metals filed Critical Sumitomo Spec Metals
Publication of SG43224A1 publication Critical patent/SG43224A1/en

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

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
SG1996005853A 1990-09-29 1991-09-27 Magnetic field generating device used for MRI SG43224A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2261418A JP2649437B2 (ja) 1990-09-29 1990-09-29 Ｍｒｉ用磁界発生装置
JP2261417A JP2649436B2 (ja) 1990-09-29 1990-09-29 Ｍｒｉ用磁界発生装置

Publications (1)

Publication Number Publication Date
SG43224A1 true SG43224A1 (en) 1997-10-17

Family

ID=26545056

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996005853A SG43224A1 (en) 1990-09-29 1991-09-27 Magnetic field generating device used for MRI

Country Status (4)

Country Link
US (1) US5283544A (de)
EP (1) EP0479514B1 (de)
DE (1) DE69129687T2 (de)
SG (1) SG43224A1 (de)

Families Citing this family (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3008615B2 (ja) * 1991-11-15 2000-02-14 大同特殊鋼株式会社 ラジアル異方性リング磁石及びその製造方法
FI105293B (fi) * 1993-06-08 2000-07-14 Picker Nordstar Oy Magneettikuvaukseen käytettävän magneetin napakenkä
EP0645641B1 (de) * 1993-09-29 1999-06-16 Oxford Magnet Technology Limited 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
US6794973B1 (en) * 1998-04-14 2004-09-21 Sumitomo Special Metals Co., Ltd. Magnetic field generating device for MRI
IT1305960B1 (it) * 1998-05-11 2001-05-21 Esaote Spa Struttura di magnete in particolare per macchine per il rilevamentod'immagine in risonanza magnetica nucleare.
JP2953659B1 (ja) * 1998-08-06 1999-09-27 住友特殊金属株式会社 Ｍｒｉ用磁界発生装置およびその組立方法並びにそれに用いる磁石ユニットの組立方法
US6150818A (en) * 1998-08-31 2000-11-21 General Electric Company Low eddy current and low hysteresis magnet pole faces in MR imaging
US6255928B1 (en) * 1998-11-02 2001-07-03 General Electric Company Magnet having a shim for a laminated pole piece
US6331363B1 (en) 1998-11-06 2001-12-18 Honeywell International Inc. Bulk amorphous metal magnetic components
US6348275B1 (en) * 1998-11-06 2002-02-19 Honeywell International Inc. Bulk amorphous metal magnetic component
US6346337B1 (en) 1998-11-06 2002-02-12 Honeywell International Inc. Bulk amorphous metal magnetic component
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
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
DE19854483B4 (de) * 1998-11-25 2005-02-24 Siemens Ag Vorrichtung zur Erzeugung eines Magnetfeldes in einem Luftspalt
JP3283242B2 (ja) * 1999-06-21 2002-05-20 ジーイー横河メディカルシステム株式会社 勾配コイルの製造方法、勾配コイルおよびｍｒｉ装置
US6552639B2 (en) 2000-04-28 2003-04-22 Honeywell International Inc. Bulk stamped amorphous metal magnetic component
US7011718B2 (en) * 2001-04-25 2006-03-14 Metglas, Inc. Bulk stamped amorphous metal magnetic component
US6973711B1 (en) 2000-05-24 2005-12-13 Fonar Corporation Method for making pieces for a magnetic resonance imaging magnet
ITSV20000023A1 (it) * 2000-06-15 2001-12-15 Esaote Spa Procedimento per la realizzazione di dispositivi di generazione di campi magnetici nelle macchine per il rilevamento di immagini in risonanz
US6744342B2 (en) * 2000-07-27 2004-06-01 Decristofaro Nicholas J. High performance bulk metal magnetic component
US7248137B1 (en) 2000-11-22 2007-07-24 Fonar Corporation Magnet structure
US6970061B1 (en) * 2000-11-22 2005-11-29 Fonar Corporation Magnet structure
US7463129B1 (en) 2000-11-22 2008-12-09 Fonar Corporation Magnet structure
US6982620B1 (en) * 2000-11-22 2006-01-03 Fonar Corporation Magnet structure
US7271689B1 (en) 2000-11-22 2007-09-18 Fonar Corporation Magnet structure
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
US20040019271A1 (en) * 2002-07-29 2004-01-29 General Electric Company Pole pieces for magnetic resonance imaging systems
US6737951B1 (en) 2002-11-01 2004-05-18 Metglas, Inc. Bulk amorphous metal inductive device
US6873239B2 (en) 2002-11-01 2005-03-29 Metglas Inc. Bulk laminated amorphous metal inductive device
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
ITSV20030011A1 (it) * 2003-03-31 2004-10-01 Esaote Spa Struttura magnetica per macchine di acquisiszione di
US6859123B2 (en) * 2003-04-03 2005-02-22 Ge Medical Systems Global Technology Company, Llc Methods and apparatus for positioning permanent magnetic blocks
US7235910B2 (en) 2003-04-25 2007-06-26 Metglas, Inc. Selective etching process for cutting amorphous metal shapes and components made thereof
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
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
US6937018B2 (en) * 2003-10-31 2005-08-30 General Electric Company Systems and methods for fabricating pole pieces for magnetic resonance imaging systems
ITSV20040016A1 (it) * 2004-04-13 2004-07-13 Esaote Spa Macchina per risonanza magnetico nucleare
US8031853B2 (en) * 2004-06-02 2011-10-04 Clearone Communications, Inc. Multi-pod conference systems
US7864937B2 (en) * 2004-06-02 2011-01-04 Clearone Communications, Inc. Common control of an electronic multi-pod conferencing system
US7916849B2 (en) * 2004-06-02 2011-03-29 Clearone Communications, Inc. Systems and methods for managing the gating of microphones in a multi-pod conference system
US8644525B2 (en) * 2004-06-02 2014-02-04 Clearone Communications, Inc. Virtual microphones in electronic conferencing systems
CN101031238B (zh) * 2004-09-30 2010-07-28 日立金属株式会社 Mri用磁场发生装置
US8457614B2 (en) * 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
CN101256221B (zh) * 2007-02-28 2010-09-29 西门子（中国）有限公司 一种减小梯度磁场导致的涡流的方法
AU2015311749B2 (en) * 2014-09-05 2018-06-21 Hyperfine Operations, Inc. Ferromagnetic augmentation for magnetic resonance imaging
JP6368625B2 (ja) * 2014-11-18 2018-08-01 株式会社日立製作所 磁気共鳴イメージング装置
EP4019995B1 (de) 2020-12-22 2023-08-16 Bruker BioSpin GmbH Epr-spektrometer mit mindestens einem zumindest teilweise aus einem funktionsmaterial hergestellten polstück
EP4336577A1 (de) * 2022-09-09 2024-03-13 Technische Universität Berlin Aktuatoranordnung und verfahren zum betrieb

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3927397A (en) * 1974-05-02 1975-12-16 Honeywell Inf Systems Bias field apparatus for magnetic domain memory device
JPS6088407A (ja) 1983-10-19 1985-05-18 Sumitomo Special Metals Co Ltd 永久磁石式磁界発生装置
NL8402250A (nl) * 1984-07-17 1986-02-17 Philips Nv Kernspin resonantie apparaat met een rechthoekig permanent magnetische magneet.
JPS61203605A (ja) 1985-03-07 1986-09-09 Fuji Electric Co Ltd 高均一磁場マグネツト
DE3518852A1 (de) * 1985-05-23 1986-11-27 Siemens AG, 1000 Berlin und 8000 München Magnet eines kernspintomographen
US4671119A (en) * 1986-04-21 1987-06-09 D. Halmi And Associates, Inc. Flow measuring device for partially filled conduits
JPS6313306A (ja) * 1986-07-04 1988-01-20 Hitachi Ltd 電磁石鉄心，及びその製作方法
JPH0782940B2 (ja) 1986-07-18 1995-09-06 株式会社東芝 Ｍｒｉ磁場発生装置
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
US4758813A (en) * 1987-06-24 1988-07-19 Field Effects, Inc. Cylindrical NMR bias magnet apparatus employing permanent magnets and methods therefor
US4943774A (en) * 1989-06-01 1990-07-24 General Atomics Magnetic field control apparatus
US4980641A (en) * 1989-08-11 1990-12-25 General Atomics Method and apparatus of reducing magnetic hysteresis in MRI systems
US5061897A (en) * 1990-03-23 1991-10-29 Fonar Corporation Eddy current control in magnetic resonance imaging
US5124651A (en) * 1990-10-24 1992-06-23 Fonar Corporation Nuclear magnetic resonance scanners with composite pole facings

Also Published As

Publication number Publication date
EP0479514B1 (de) 1998-07-01
DE69129687D1 (de) 1998-08-06
DE69129687T2 (de) 1999-03-11
US5283544A (en) 1994-02-01
EP0479514A1 (de) 1992-04-08

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