DE69937533D1 - Offener Magnet mit Abschirmung - Google Patents

Offener Magnet mit Abschirmung

Info

Publication number
DE69937533D1
DE69937533D1 DE69937533T DE69937533T DE69937533D1 DE 69937533 D1 DE69937533 D1 DE 69937533D1 DE 69937533 T DE69937533 T DE 69937533T DE 69937533 T DE69937533 T DE 69937533T DE 69937533 D1 DE69937533 D1 DE 69937533D1
Authority
DE
Germany
Prior art keywords
shield
open magnet
magnet
open
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
DE69937533T
Other languages
English (en)
Other versions
DE69937533T2 (de
Inventor
Evangelos Trifon Laskaris
Michael Anthony Palmo Jr
Bu-Xin Xu
Michelle Dollar Ogle
Bruce Campbell Amm
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of DE69937533D1 publication Critical patent/DE69937533D1/de
Application granted granted Critical
Publication of DE69937533T2 publication Critical patent/DE69937533T2/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
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field
    • 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
    • G01R33/3806—Open magnet assemblies for improved access to the sample, e.g. C-type or U-type 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
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
DE69937533T 1998-11-24 1999-11-24 Offener Magnet mit Abschirmung Expired - Fee Related DE69937533T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/199,096 US5994991A (en) 1998-02-19 1998-11-24 Open magnet having shielding
US199096 1998-11-24

Publications (2)

Publication Number Publication Date
DE69937533D1 true DE69937533D1 (de) 2007-12-27
DE69937533T2 DE69937533T2 (de) 2008-09-04

Family

ID=22736192

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69937533T Expired - Fee Related DE69937533T2 (de) 1998-11-24 1999-11-24 Offener Magnet mit Abschirmung

Country Status (4)

Country Link
US (2) US5994991A (de)
EP (1) EP1004887B1 (de)
JP (1) JP2000279394A (de)
DE (1) DE69937533T2 (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201462B1 (en) * 1999-11-09 2001-03-13 General Electric Company Open superconductive magnet having a cryocooler coldhead
US6507190B1 (en) 2000-08-01 2003-01-14 Ge Medical Systems Global Technologies Company Llc Method and apparatus for compensating polarizing fields in magnetic resonance imaging
DE10046182C2 (de) * 2000-09-19 2002-08-01 Bruker Ag Faellanden Magnetanordnung mit einem supraleitenden Magnetspulensystem und einer magnetischen Feldform-Vorrichtung sowie Verfahren zur Dimensionierung
US6570475B1 (en) 2000-11-20 2003-05-27 Intermagnetics General Corp. Split type magnetic resonance imaging magnet
US20040041565A1 (en) 2002-05-08 2004-03-04 Shigeru Kakugawa NMR magnet device for solution analysis and NMR apparatus
US6984982B2 (en) * 2002-07-29 2006-01-10 Ge Medical Systems Global Technology Company Llc Method and system for shimming an MRI magnet assembly
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
US6783059B2 (en) * 2002-12-23 2004-08-31 General Electric Company Conduction cooled passively-shielded MRI magnet
DE10346275B4 (de) * 2003-10-06 2005-08-18 Siemens Ag Erzeuger zeitvariabler Magnetfelder eines Magnetresonanzgeräts und Magnetresonanzgerät mit dem Erzeuger
JP3587844B1 (ja) * 2003-11-17 2004-11-10 株式会社日立製作所 超伝導磁石装置及びそれを用いた磁気共鳴イメージング装置
JP4541092B2 (ja) * 2004-10-04 2010-09-08 株式会社日立製作所 磁気共鳴イメージング装置の超伝導磁石装置
JP2006115934A (ja) * 2004-10-19 2006-05-11 Mitsubishi Electric Corp 磁石装置及びそれを用いた磁気共鳴イメージング装置
JP2006261335A (ja) * 2005-03-16 2006-09-28 Kobe Steel Ltd 超電導マグネット装置
US7274192B2 (en) * 2005-05-31 2007-09-25 General Electric Company Combined open and closed magnet configuration for MRI
JP4908960B2 (ja) * 2006-07-27 2012-04-04 株式会社日立製作所 超伝導磁石装置および磁気共鳴イメージング装置
US7560929B2 (en) * 2006-08-14 2009-07-14 Fonar Corporation Ferromagnetic frame magnet with superconducting coils
JP4921935B2 (ja) 2006-11-22 2012-04-25 株式会社日立製作所 電磁石装置及び磁気共鳴撮像装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896128A (en) * 1988-11-30 1990-01-23 General Electric Company Support structure for high field magnet coils
EP0525246A1 (de) * 1991-08-01 1993-02-03 Siemens Aktiengesellschaft Magneteinrichtung mit einem ein magnetisches Streufeld erzeugenden Jochkörper
US5410287A (en) * 1994-04-05 1995-04-25 General Electric Company Open MRI magnet with uniform magnetic field
US5463364A (en) * 1994-04-13 1995-10-31 Bruker Analytische Messtechnik Gmbh Magnet system for NMR tomography
US5448214A (en) * 1994-06-15 1995-09-05 General Electric Company Open MRI magnet with superconductive shielding
US5565831A (en) * 1995-10-23 1996-10-15 General Electric Company Shielded and open MRI magnet
JPH09190913A (ja) * 1996-01-10 1997-07-22 Hitachi Medical Corp 超電導磁石装置及びそれを用いた磁気共鳴イメージング装置
US5721523A (en) * 1996-08-26 1998-02-24 General Electric Company Compact MRI superconducting magnet
IT1294051B1 (it) * 1997-04-29 1999-03-15 Esaote Spa Struttura magnetica per la generazione di campi magnetici adatti all'uso nel rilevamento d'immagine in risonanza magnetica nucleare
US5874880A (en) * 1998-03-05 1999-02-23 General Electric Company Shielded and open superconductive magnet
US5874882A (en) * 1998-02-19 1999-02-23 General Electric Company Open and shielded superconductive magnet
JPH11318857A (ja) * 1998-03-05 1999-11-24 General Electric Co <Ge> 開放型磁石

Also Published As

Publication number Publication date
JP2000279394A (ja) 2000-10-10
DE69937533T2 (de) 2008-09-04
US6157279A (en) 2000-12-05
US5994991A (en) 1999-11-30
EP1004887B1 (de) 2007-11-14
EP1004887A1 (de) 2000-05-31

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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