FI863407A0 - Magnetisk resonansavbildningsapparat innehaollande magnetiska element avsedda foer faelthomogenisering. - Google Patents

Magnetisk resonansavbildningsapparat innehaollande magnetiska element avsedda foer faelthomogenisering.

Info

Publication number
FI863407A0
FI863407A0 FI863407A FI863407A FI863407A0 FI 863407 A0 FI863407 A0 FI 863407A0 FI 863407 A FI863407 A FI 863407A FI 863407 A FI863407 A FI 863407A FI 863407 A0 FI863407 A0 FI 863407A0
Authority
FI
Finland
Prior art keywords
faelthomogenisering
innehaollande
magnetic
magnetic resonance
magnetic element
Prior art date
Application number
FI863407A
Other languages
English (en)
Other versions
FI863407A (fi
Inventor
Ewoud Vreugdenhil
Der Vlugt Franciscus Van
Original Assignee
Philips 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 Philips Nv filed Critical Philips Nv
Publication of FI863407A0 publication Critical patent/FI863407A0/fi
Publication of FI863407A publication Critical patent/FI863407A/fi

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)
FI863407A 1985-08-26 1986-08-22 Magnetisk resonansavbildningsapparat innehaollande magnetiska element avsedda foer faelthomogenisering. FI863407A (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8502340A NL8502340A (nl) 1985-08-26 1985-08-26 Magnetisch resonantie apparaat met veld homogeniserende magnetische elementen.

Publications (2)

Publication Number Publication Date
FI863407A0 true FI863407A0 (fi) 1986-08-22
FI863407A FI863407A (fi) 1987-02-27

Family

ID=19846468

Family Applications (1)

Application Number Title Priority Date Filing Date
FI863407A FI863407A (fi) 1985-08-26 1986-08-22 Magnetisk resonansavbildningsapparat innehaollande magnetiska element avsedda foer faelthomogenisering.

Country Status (7)

Country Link
US (1) US4771243A (fi)
EP (1) EP0216404B1 (fi)
JP (1) JPH0763457B2 (fi)
DE (1) DE3669786D1 (fi)
FI (1) FI863407A (fi)
IL (1) IL79831A (fi)
NL (1) NL8502340A (fi)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184243B (en) * 1985-12-09 1989-12-20 Picker Int Ltd Electromagnet arrangements
WO1988008126A1 (en) * 1987-04-15 1988-10-20 Oxford Magnet Technology Limited Magnetic field generating apparatus
DE3866060D1 (de) * 1987-08-14 1991-12-12 Siemens Ag Elektrischer magnet fuer kernspin-thomographen.
FR2623324A1 (fr) * 1987-11-13 1989-05-19 Thomson Cgr Dispositif d'imagerie rmn, procede de correction d'inhomogeneite et procede de realisation d'aimants mis en oeuvre dans le dispositif
US4881035A (en) * 1987-11-24 1989-11-14 Siemens Aktiengesellschaft Magnetic structural arrangement of an installation for nuclear magnetic resonance tomography with superconducting background field coils and normal-conducting gradient coils
GB8808334D0 (en) * 1988-04-08 1988-05-11 Magnex Scient Ltd Electromagnets
JPH0690975B2 (ja) * 1988-06-03 1994-11-14 三菱電機株式会社 磁場補正用磁性体シム
US4853663A (en) * 1988-12-22 1989-08-01 General Electric Company Passive shims for correction of (3,2) and (3,-2) harmonic terms in magnetic resonance magnets
GB8912601D0 (en) * 1989-06-01 1989-07-19 Oxford Magnet Tech Magnetic field generating apparatus
US5001447A (en) * 1989-08-23 1991-03-19 General Electric Company Ferromagnetic compensation rings for high field strength magnets
NL9001300A (nl) * 1990-06-08 1992-01-02 Koninkl Philips Electronics Nv Magneetstelsel voor magnetische resonantie.
GB9105286D0 (en) * 1991-03-13 1991-04-24 Oxford Instr Ltd Magnetic field generating apparatus
US5317298A (en) * 1993-01-04 1994-05-31 General Electric Company Apparatus and method for passive shimming of a superconducting magnet which images human limbs
GB2276945B (en) * 1993-04-08 1997-02-26 Oxford Magnet Tech Improvements in or relating to MRI magnets
BE1007783A3 (nl) * 1993-11-25 1995-10-17 Philips Electronics Nv Magnetisch resonantie apparaat met elementen voor het homogeniseren van het magneetveld.
GB9407309D0 (en) * 1994-04-13 1994-06-08 Oxford Magnet Tech Improvements in or relating to magnetic resonance imaging apparatus
EP0677751B1 (en) * 1994-04-13 2000-10-18 Oxford Magnet Technology Limited Improvements in or relating to magnetic resonance imaging apparatus
DE4412755C2 (de) * 1994-04-13 1996-09-05 Bruker Analytische Messtechnik Magnetsystem für die NMR-Tomographie
US5532597A (en) * 1994-11-04 1996-07-02 Picker International, Inc. Passive shimming technique for MRI magnets
US5635839A (en) * 1994-11-04 1997-06-03 Picker International, Inc. High order passive shimming assembly for MRI magnets
US5550472A (en) * 1995-04-13 1996-08-27 Picker International, Inc. Combined radio frequency coil with integral magnetic field shim set
JP3663262B2 (ja) * 1995-10-23 2005-06-22 ゼネラル・エレクトリック・カンパニイ 開放形磁気共鳴作像磁石
US5594401A (en) * 1996-02-20 1997-01-14 General Electric Company Closed superconductive magnet with uniform imaging volume
US5568102A (en) * 1996-02-20 1996-10-22 General Electric Company Closed superconductive magnet with homogeneous imaging volume
JP3585141B2 (ja) * 1996-04-05 2004-11-04 株式会社日立メディコ 超電導磁石装置
EP0826978A1 (en) * 1996-08-26 1998-03-04 General Electric Company Closed MRI magnet having compact design
US5721523A (en) * 1996-08-26 1998-02-24 General Electric Company Compact MRI superconducting magnet
US6861933B1 (en) 2001-05-17 2005-03-01 Mitsubishi Denki Kabushiki Kaisha Superconductive magnet device
DE60230561D1 (de) * 2001-05-17 2009-02-12 Mitsubishi Electric Corp Supraleitender Magnet für die bildgebende magnetische Resonanz
US7508208B2 (en) * 2004-03-03 2009-03-24 Koninklijke Philips Electronics N.V. Magnetic resonance imaging scanner with booster iron
US7417434B2 (en) * 2004-06-17 2008-08-26 Koninklijke Philips Electronics N.V. Magnetic resonance imaging system with iron-assisted magnetic field gradient system
JP5943355B2 (ja) * 2011-03-25 2016-07-05 株式会社日立製作所 静磁場均一度の調整方法、磁気共鳴イメージング用静磁場発生装置、磁場調整システム、プログラム

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3123493A1 (de) * 1981-06-13 1982-12-30 Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten Elektromagnet fuer die nmr-tomographie
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
DE3245945A1 (de) * 1982-12-11 1984-06-14 Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten Elektromagnet fuer die nmr-tomographie
US4591789A (en) * 1983-12-23 1986-05-27 General Electric Company Method for correcting image distortion due to gradient nonuniformity
GB8402360D0 (en) * 1984-01-30 1984-02-29 Picker Int Ltd Nmr shims
JPS60189905A (ja) * 1984-03-09 1985-09-27 Mitsubishi Electric Corp 高均一磁界発生装置
GB8407098D0 (en) * 1984-03-19 1984-04-26 Picker Int Ltd Nuclear magnetic resonance apparatus
US4506247A (en) * 1984-05-23 1985-03-19 General Electric Company Axisymmetric correction coil system for NMR magnets
DE8419763U1 (de) * 1984-07-02 1986-03-20 Siemens AG, 1000 Berlin und 8000 München Kernspin-Tomographiegerät

Also Published As

Publication number Publication date
EP0216404B1 (en) 1990-03-21
JPS6247349A (ja) 1987-03-02
IL79831A (en) 1990-08-31
JPH0763457B2 (ja) 1995-07-12
EP0216404A1 (en) 1987-04-01
FI863407A (fi) 1987-02-27
DE3669786D1 (de) 1990-04-26
NL8502340A (nl) 1987-03-16
IL79831A0 (en) 1986-11-30
US4771243A (en) 1988-09-13

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Legal Events

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MM Patent lapsed

Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN