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DE69936494D1 - Magnetresonanzsystem mit Shim-Ringen - Google Patents

Magnetresonanzsystem mit Shim-Ringen

Info

Publication number
DE69936494D1
DE69936494D1 DE69936494T DE69936494T DE69936494D1 DE 69936494 D1 DE69936494 D1 DE 69936494D1 DE 69936494 T DE69936494 T DE 69936494T DE 69936494 T DE69936494 T DE 69936494T DE 69936494 D1 DE69936494 D1 DE 69936494D1
Authority
DE
Germany
Prior art keywords
magnetic resonance
resonance system
shim rings
shim
rings
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
DE69936494T
Other languages
English (en)
Other versions
DE69936494T2 (de
Inventor
John V M Mcginley
Ian R Young
Gordon D Demeester
Ilmari Kinanen
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of DE69936494D1 publication Critical patent/DE69936494D1/de
Application granted granted Critical
Publication of DE69936494T2 publication Critical patent/DE69936494T2/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
    • G01R33/383—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)
DE69936494T 1998-08-28 1999-08-03 Magnetresonanzsystem mit Shim-Ringen Expired - Fee Related DE69936494T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US141708 1998-08-28
US09/141,708 US6218838B1 (en) 1998-08-28 1998-08-28 MRI magnet with high homogeneity, patient access, and low forces on the driver coils

Publications (2)

Publication Number Publication Date
DE69936494D1 true DE69936494D1 (de) 2007-08-23
DE69936494T2 DE69936494T2 (de) 2008-03-13

Family

ID=22496867

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69936494T Expired - Fee Related DE69936494T2 (de) 1998-08-28 1999-08-03 Magnetresonanzsystem mit Shim-Ringen

Country Status (4)

Country Link
US (1) US6218838B1 (de)
EP (1) EP0982598B1 (de)
JP (1) JP2000070238A (de)
DE (1) DE69936494T2 (de)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6157278A (en) * 1997-07-23 2000-12-05 Odin Technologies Ltd. Hybrid magnetic apparatus for use in medical applications
JP2001078982A (ja) * 1999-09-16 2001-03-27 Hitachi Medical Corp 開放型磁石装置
US6335670B1 (en) * 2000-04-14 2002-01-01 Marconi Medical Systems Finland, Inc. Mri system with split rose ring with high homogeneity
DE60230561D1 (de) * 2001-05-17 2009-02-12 Mitsubishi Electric Corp Supraleitender Magnet für die bildgebende magnetische Resonanz
US6861933B1 (en) 2001-05-17 2005-03-01 Mitsubishi Denki Kabushiki Kaisha Superconductive magnet device
JP3694659B2 (ja) 2001-07-16 2005-09-14 株式会社日立製作所 マグネット及びその磁場調整方法並びに磁気共鳴撮像装置
US6627003B2 (en) 2001-10-24 2003-09-30 Ge Medical Systems Global Technology Company, Llc NMR shim forming method
AU2002351020A1 (en) * 2001-12-10 2003-06-23 Koninklijke Philips Electronics N.V. Open magnetic resonance imaging (mri) magnet system
DE10161925B4 (de) * 2001-12-17 2005-08-18 Siemens Ag Verfahren zum Aufnehmen von Magnetresonanzsignalen eines Objekts mittels einer Magnetresonanzanlage und Rekonstruieren eines Bildes anhand der aufgenommenen Magnetresonanzsignale, sowie Computerprogrammprodukt und Magnetresonanzanlage
US7215231B1 (en) 2002-08-16 2007-05-08 Fonar Corporation MRI system
US7242191B2 (en) * 2002-11-25 2007-07-10 General Electric Company Cold mass support structure and helium vessel of actively shielded high field open MRI magnets
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
DE102004003535B3 (de) * 2004-01-23 2005-10-13 Siemens Ag Erzeuger eines zeitvariablen Magnetfelds eines Magnetresonanzgeräts und Magnetresonanzgerät mit einem derartigen Erzeuger eines zeitvariablen Magnetfelds
ATE420375T1 (de) * 2004-06-17 2009-01-15 Koninkl Philips Electronics Nv Magnetresonanzabbildungssystem mit eisenunterstütztem magnetfeldgradientensystem
JP4749699B2 (ja) * 2004-11-17 2011-08-17 株式会社日立メディコ 磁気共鳴イメージング装置
US20110175694A1 (en) 2008-06-24 2011-07-21 Fallone B Gino Magnetic assembly and method for defining a magnetic field for an imaging volume
CN102360691B (zh) * 2011-06-24 2013-03-13 中国科学院电工研究所 一种带有铁环结构的开放式核磁共振磁体系统
GB201114045D0 (en) * 2011-08-15 2011-09-28 Emscan Ltd Magnet
WO2016162734A1 (en) * 2015-04-10 2016-10-13 Synaptive Medical (Barbados) Inc. Shimming coils for magnetic resonance imaging
WO2018175807A1 (en) * 2017-03-22 2018-09-27 Viewray Technologies, Inc. Reduction of artifacts in magnetic resonance imaging by creating inhomogeneity in the magnetic field at gradient null position of an mri system

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000611A1 (en) * 1982-08-04 1984-02-16 William H Oldendorf Adjustable magnet suitable for in vivo nmr imaging and method of adjusting the same
GB8530295D0 (en) 1985-12-09 1986-01-22 Picker Int Ltd Electromagnet arrangements
GB8825529D0 (en) 1988-11-01 1988-12-07 Oxford Magnet Tech Magnetic field generating assembly
US5134374A (en) * 1989-06-01 1992-07-28 Applied Superconetics Magnetic field control apparatus
JP3742662B2 (ja) 1992-08-05 2006-02-08 ゼネラル・エレクトリック・カンパニイ 開放形磁気共鳴イメージングに適した磁石
US5754085A (en) * 1992-09-28 1998-05-19 Fonar Corporation Ferromagnetic yoke magnets for medical magnetic resonance studies
US5647361A (en) 1992-09-28 1997-07-15 Fonar Corporation Magnetic resonance imaging method and apparatus for guiding invasive therapy
US5345208A (en) * 1993-05-26 1994-09-06 General Electric Company Pole face design for a C-shaped superconducting magnet
FI105293B (fi) * 1993-06-08 2000-07-14 Picker Nordstar Oy Magneettikuvaukseen käytettävän magneetin napakenkä
US5550472A (en) * 1995-04-13 1996-08-27 Picker International, Inc. Combined radio frequency coil with integral magnetic field shim set
JP3151129B2 (ja) * 1995-08-28 2001-04-03 信越化学工業株式会社 磁石対向型永久磁石磁気回路とその磁場調整方法
GB2311375B (en) * 1996-03-20 2000-08-23 Oxford Magnet Tech Improvements in or relating to MRI magnets
US5864236A (en) * 1996-07-05 1999-01-26 Toshiba America Mri, Inc. Open configuration MRI magnetic flux path

Also Published As

Publication number Publication date
EP0982598B1 (de) 2007-07-11
US6218838B1 (en) 2001-04-17
EP0982598A2 (de) 2000-03-01
JP2000070238A (ja) 2000-03-07
DE69936494T2 (de) 2008-03-13
EP0982598A3 (de) 2002-02-13

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Legal Events

Date Code Title Description
8320 Willingness to grant licences declared (paragraph 23)
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee