DE69325255T2 - Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz - Google Patents

Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz

Info

Publication number
DE69325255T2
DE69325255T2 DE69325255T DE69325255T DE69325255T2 DE 69325255 T2 DE69325255 T2 DE 69325255T2 DE 69325255 T DE69325255 T DE 69325255T DE 69325255 T DE69325255 T DE 69325255T DE 69325255 T2 DE69325255 T2 DE 69325255T2
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
DE69325255T
Other languages
English (en)
Other versions
DE69325255D1 (de
Inventor
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
Application filed by Oxford Magnet Technology Ltd filed Critical Oxford Magnet Technology Ltd
Publication of DE69325255D1 publication Critical patent/DE69325255D1/de
Application granted granted Critical
Publication of DE69325255T2 publication Critical patent/DE69325255T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01R33/387—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)
DE69325255T 1993-04-08 1993-11-19 Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz Expired - Fee Related DE69325255T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9307380A GB2276946B (en) 1993-04-08 1993-04-08 Improvements in or relating to MRI magnets

Publications (2)

Publication Number Publication Date
DE69325255D1 DE69325255D1 (de) 1999-07-15
DE69325255T2 true DE69325255T2 (de) 1999-11-04

Family

ID=10733579

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69325255T Expired - Fee Related DE69325255T2 (de) 1993-04-08 1993-11-19 Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz

Country Status (5)

Country Link
US (1) US5431165A (de)
EP (1) EP0619499B1 (de)
JP (1) JPH07171131A (de)
DE (1) DE69325255T2 (de)
GB (1) GB2276946B (de)

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FI933834A (fi) * 1993-09-01 1995-03-02 Picker Nordstar Oy Magneettikuvauslaitteen napakenkä
FR2710780B1 (fr) * 1993-09-30 1995-10-27 Commissariat Energie Atomique Structures magnétiques ouvertes.
US5677854A (en) * 1995-01-17 1997-10-14 General Electric Company Method for passively shimming a magnet
DE69613061T2 (de) * 1995-08-28 2001-10-31 Shinetsu Chemical Co Magnetkreisanordnung mit einander gegenüberliegenden Permanentmagneten
EP0883143B1 (de) * 1996-10-30 2008-09-17 Hitachi Medical Corporation Supraleitende magnetfelderzeugende einrichtung
JPH10135027A (ja) * 1996-10-30 1998-05-22 Hitachi Medical Corp 超電導磁石装置
DE19702567A1 (de) * 1997-01-24 1998-03-12 Siemens Ag Gerät mit einem Permanentmagnet
US6275128B1 (en) * 1997-12-26 2001-08-14 Sumitomo Special Metals Co., Ltd. MRI magnetic field generator
US6147495A (en) * 1998-08-28 2000-11-14 Picker International, Inc. Magnetic resonance imaging with integrated poleface features
JP2000139874A (ja) 1998-09-02 2000-05-23 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置
DE19901331B4 (de) * 1999-01-15 2006-10-26 Bruker Biospin Gmbh Einrichtung und Verfahren zum Homogenisieren eines Magnetfeldes
US6252405B1 (en) 1999-11-15 2001-06-26 General Electric Company Temperature compensated NMR magnet and method of operation therefor
WO2001053847A1 (en) 2000-01-19 2001-07-26 Millennium Technology Inc. C-shaped magnetic resonance imaging system
US6448772B1 (en) * 2000-10-06 2002-09-10 Sumitomo Special Metals Co., Ltd. Magnetic field adjusting apparatus, magnetic field adjusting method and recording medium
JP3788573B2 (ja) * 2000-11-16 2006-06-21 信越化学工業株式会社 Ｍｒｉ用磁気回路の組立方法
US6670877B2 (en) * 2001-01-25 2003-12-30 Uri Rapoport Field adjusting mechanisms and methods for permanent magnet arrangement with backplate
US6566991B1 (en) * 2001-04-24 2003-05-20 Fonar Corporation Apparatus and method of shimming a magnetic field
JP2002336215A (ja) * 2001-05-17 2002-11-26 Mitsubishi Electric Corp 超電導マグネット装置及び磁場均一度調整方法
DE10147984B4 (de) * 2001-09-28 2007-10-11 Siemens Ag Magnetresonanz-Untersuchungsgerät mit einer Einrichtung zur Erzeugung eines homogenen Magnetfeldes und Verfahren zur Verbesserung der Homogenität eines Magnetfeldes
US7084632B2 (en) * 2002-04-01 2006-08-01 Shenyang Neusoft Bopu Nmr Tech Co., Ltd. Permanent magnet for magnet resonance
JP4040930B2 (ja) * 2002-08-26 2008-01-30 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 磁場均一化方法および装置
CN100504432C (zh) * 2003-05-23 2009-06-24 西门子（中国）有限公司 磁共振设备中的静磁场调节方法及其静磁场发生装置
US7148689B2 (en) * 2003-09-29 2006-12-12 General Electric Company Permanent magnet assembly with movable permanent body for main magnetic field adjustable
JP4767688B2 (ja) * 2003-10-15 2011-09-07 株式会社日立メディコ 磁気共鳴イメージング装置
CN100434038C (zh) * 2004-03-05 2008-11-19 西门子（中国）有限公司 磁共振成像设备磁场的调节装置
JP3733441B1 (ja) * 2004-07-02 2006-01-11 株式会社日立製作所 磁気共鳴撮像装置及びその磁石装置
US7295012B1 (en) * 2006-04-28 2007-11-13 General Electric Company Methods and apparatus for MRI shim elements
US7759938B2 (en) * 2007-02-05 2010-07-20 Morpho Detection, Inc. Apparatus and method for varying magnetic field strength in magnetic resonance measurements
US8384387B1 (en) * 2008-02-14 2013-02-26 Fonar Corporation Magnetic resonance imaging apparatus
JP5012572B2 (ja) * 2008-02-29 2012-08-29 富士通株式会社 マグネトロンスパッタ装置用磁石ユニット
CA2780181C (en) * 2009-12-02 2019-10-15 Nanalysis Corp. Method and apparatus for producing homogeneous magnetic fields
GB201114045D0 (en) 2011-08-15 2011-09-28 Emscan Ltd Magnet
EP2812901B1 (de) * 2012-02-10 2021-09-15 Nanalysis Corp. Polstück zur verwendung in einem halbach-array
JP6046560B2 (ja) * 2013-06-04 2016-12-14 株式会社日立製作所 磁石装置及び磁気共鳴撮像装置
DE102013013719A1 (de) * 2013-08-20 2015-03-12 Krohne Ag Homogenisierungsvorrichtung zur Homogenisierung eines Magnetfelds
US10945631B2 (en) 2019-07-18 2021-03-16 Sigwa Company, Llc Magnet assembly for magnetic resonance imaging (MRI) scanning system
CN111968822B (zh) * 2020-07-07 2022-06-10 无锡鸣石峻致医疗科技有限公司 一种适用于便携式核磁共振装置使用的永磁体

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EP0114889A1 (de) * 1982-08-04 1984-08-08 OLDENDORF, William H. Einstellbarer magnet geeignet zur in vivo nmr-bildaufnahme und verfahren zum einstellen desselben
JPS5960346A (ja) * 1982-09-30 1984-04-06 Toshiba Corp 磁気共鳴イメージング装置用傾斜磁場コイルユニット
US4673882A (en) * 1984-03-06 1987-06-16 Buford J Philip Magnetic system for nuclear magnetic resonance diagnostic device
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US4682111A (en) * 1985-03-05 1987-07-21 Kabushiki Kaisha Toshiba Magnetic resonance imaging magnet
US4703276A (en) * 1985-04-24 1987-10-27 Elscint Ltd. Permanent magnet ring assembly for NMR imaging system and method for using such assembly
US5063934A (en) * 1987-10-07 1991-11-12 Advanced Techtronics, Inc. Permanent magnet arrangement
US4953555A (en) * 1987-10-20 1990-09-04 The United States Of Americas As Represented By The Secretary Of The Army Permanent magnet structure for a nuclear magnetic resonance imager for medical diagnostics
US5207224A (en) * 1988-12-09 1993-05-04 Picker International, Ltd. Magnetic resonance apparatus
US5134374A (en) * 1989-06-01 1992-07-28 Applied Superconetics Magnetic field control apparatus
JPH03131234A (ja) * 1989-07-07 1991-06-04 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置
US5235284A (en) * 1989-07-07 1993-08-10 Mitsubishi Denki Kabushiki Kaisha Passive shim arrangement for nuclear magnetic resonance
US5003276A (en) * 1989-08-11 1991-03-26 General Atomics Method of site shimming on permanent magnets
US5045794A (en) * 1989-12-04 1991-09-03 General Electric Company Method of optimizing passive shim placement in magnetic resonance magnets
US4983942A (en) * 1989-12-04 1991-01-08 General Electric Company Apparatus for locating passive shim guide rails in MR magnets
JP2533758Y2 (ja) * 1989-12-13 1997-04-23 信越化学工業 株式会社 磁場発生装置
EP0488015B1 (de) * 1990-11-30 1996-10-30 Siemens Aktiengesellschaft Homogenfeldmagnet mit mindestens einer mechanisch auszurichtenden Polplatte

Also Published As

Publication number Publication date
DE69325255D1 (de) 1999-07-15
GB9307380D0 (en) 1993-06-02
EP0619499B1 (de) 1999-06-09
US5431165A (en) 1995-07-11
EP0619499A1 (de) 1994-10-12
JPH07171131A (ja) 1995-07-11
GB2276946B (en) 1997-04-02
GB2276946A (en) 1994-10-12

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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