IL78669A0 - Methods of overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging - Google Patents

Methods of overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging

Info

Publication number
IL78669A0
IL78669A0 IL78669A IL7866986A IL78669A0 IL 78669 A0 IL78669 A0 IL 78669A0 IL 78669 A IL78669 A IL 78669A IL 7866986 A IL7866986 A IL 7866986A IL 78669 A0 IL78669 A0 IL 78669A0
Authority
IL
Israel
Prior art keywords
methods
resonance imaging
magnetic field
field inhomogeneity
magnetic resonance
Prior art date
Application number
IL78669A
Other languages
English (en)
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Publication of IL78669A0 publication Critical patent/IL78669A0/xx

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
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/4818—MR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g. centric or segmented coverage of k-space
    • G01R33/482—MR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g. centric or segmented coverage of k-space using a Cartesian trajectory
    • 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
    • G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
    • 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
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/565—Correction of image distortions, e.g. due to magnetic field inhomogeneities
    • G01R33/56518—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to eddy currents, e.g. caused by switching of the gradient magnetic field
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/842—Measuring and testing
    • Y10S505/843—Electrical
    • Y10S505/844—Nuclear magnetic resonance, NMR, system or device

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
IL78669A 1985-07-29 1986-05-02 Methods of overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging IL78669A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/760,222 US4647858A (en) 1985-07-29 1985-07-29 Methods for overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging

Publications (1)

Publication Number Publication Date
IL78669A0 true IL78669A0 (en) 1986-08-31

Family

ID=25058457

Family Applications (1)

Application Number Title Priority Date Filing Date
IL78669A IL78669A0 (en) 1985-07-29 1986-05-02 Methods of overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging

Country Status (4)

Country Link
US (1) US4647858A (de)
EP (1) EP0210562A3 (de)
JP (1) JPS6264351A (de)
IL (1) IL78669A0 (de)

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IL79076A (en) * 1986-06-10 1989-10-31 Elscint Ltd Restricted volume imaging
JPS63109849A (ja) * 1986-10-29 1988-05-14 株式会社日立メディコ Ｎｍｒイメ−ジング装置
DE3730148A1 (de) * 1987-09-09 1989-03-30 Bruker Medizintech Verfahren zum erzeugen von spin-echo-impulsfolgen mit einem kernspin-tomographen und zur durchfuehrung des verfahrens ausgebildeter kernspin-tomograph
JP2642362B2 (ja) * 1987-09-30 1997-08-20 株式会社東芝 磁気共鳴映像装置
JPH03501090A (ja) * 1987-11-05 1991-03-14 ユニバーシティー　オブ　クイーンスランド Ｎｍｒ分光器の磁界均質化方法
US4812797A (en) * 1988-03-22 1989-03-14 General Electric Company Compensation coil for temporal drift of a superconducting magnet
EP0351446B1 (de) * 1988-07-22 1992-04-01 Siemens Aktiengesellschaft Pulssequenz für ein Kernspin-Tomographiegerät
JP2580747B2 (ja) * 1988-11-28 1997-02-12 株式会社島津製作所 Ｍｒｉ装置の傾斜磁場印加方法
US4965521A (en) * 1989-08-11 1990-10-23 Spectroscopy Imaging Systems Method and apparatus for compensating eddy current effects in a magnetic resonance device having pulsed magnetic field gradients
JPH03224538A (ja) * 1990-01-31 1991-10-03 Hitachi Medical Corp 一次の静磁場不均一を補正して計測する過程を備えたｍｒｉ装置
NL9100138A (nl) * 1991-01-28 1992-08-17 Philips Nv Magnetische resonantie werkwijze en inrichting ter reductie van beeldfouten in een magnetisch resonantiebeeld.
EP0577188B1 (de) * 1992-06-29 1999-09-01 Koninklijke Philips Electronics N.V. Verfahren und Gerät zur Kernresonanzabbildung
DE69326202T2 (de) * 1992-06-29 2000-04-13 Koninklijke Philips Electronics N.V., Eindhoven Verfahren und Gerät zur Kernresonanzabbildung
US5530356A (en) * 1992-07-20 1996-06-25 Kabushiki Kaisha Toshiba Method and apparatus for generating magnetic fields for nuclear magnetic resonance imaging with cross-talk compensation
DE69329873T2 (de) * 1992-10-26 2001-09-13 Koninklijke Philips Electronics N.V., Eindhoven Kompensierung von Wirbelströmen in der Bilderzeugung mittels magnetischer Resonanz
DE4325031C1 (de) * 1993-07-26 1994-11-03 Siemens Ag Verfahren zur Erfassung von durch Gradienten verursachten Wirbelstrom-Magnetfeldern in einem Kernspinresonanzgerät
JP3505294B2 (ja) * 1995-03-28 2004-03-08 ジーイー横河メディカルシステム株式会社 Ｍｒｉ装置
US5917323A (en) * 1997-07-01 1999-06-29 General Electric Company Correction of axial image signal fall off caused by Maxwell terms
DE19943372C2 (de) * 1999-09-10 2001-07-19 Siemens Ag Gradientenspulensystem für ein Magnetresonanztomographiegerät
DE10203279C1 (de) * 2002-01-29 2003-10-09 Bruker Biospin Ag Verfahren zur Beeinflussung des homogenen statischen Magnetfelds in einer NMR-Apparatur und zugehöriger NMR-Resonator
DE102008004256B4 (de) * 2008-01-14 2010-01-07 Siemens Aktiengesellschaft SAR-optimierte Ansteuerung eines Spulenarrays
JP5416960B2 (ja) * 2008-12-17 2014-02-12 株式会社東芝 磁気共鳴イメージング装置
WO2010074057A1 (ja) * 2008-12-26 2010-07-01 株式会社 日立メディコ 磁気共鳴イメージング装置及びパルスシーケンス調整方法
JP2012040362A (ja) * 2010-07-23 2012-03-01 Toshiba Corp 磁気共鳴イメージング方法、磁気共鳴イメージング装置およびその制御装置
DE102013202217B4 (de) 2013-02-12 2015-05-28 Siemens Aktiengesellschaft MR-Anlage mit gepulsten Ausgleichsmagnetfeldgradienten
DE102018205867A1 (de) * 2018-04-18 2019-10-24 Siemens Healthcare Gmbh Verfahren und Vorrichtung zur Erstellung einer Pulssequenz zur Ansteuerung eines Magnetresonanztomographie-Systems
EP3640661B1 (de) * 2018-10-16 2025-03-05 Siemens Healthineers AG Verfahren und magnetresonanzbildgebungssystem zur aktiven kompensation von wirbelstrominduzierten magnetfeldern in der magnetresonanzbildgebung

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* Cited by examiner, † Cited by third party
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US4180769A (en) * 1978-02-21 1979-12-25 Varian Associates, Inc. Superconducting solenoid with compensation for axial gradients
GB1578910A (en) * 1978-05-25 1980-11-12 Emi Ltd Imaging systems
US4284950A (en) * 1978-08-05 1981-08-18 E M I Limited Imaging systems
US4599565A (en) * 1981-12-15 1986-07-08 The Regents Of The University Of Calif. Method and apparatus for rapid NMR imaging using multi-dimensional reconstruction techniques
US4484138A (en) * 1982-07-01 1984-11-20 General Electric Company Method of eliminating effects of spurious free induction decay NMR signal caused by imperfect 180 degrees RF pulses
US4506223A (en) * 1982-11-22 1985-03-19 General Electric Company Method for performing two-dimensional and three-dimensional chemical shift imaging
US4585993A (en) * 1983-12-14 1986-04-29 General Electric Company Method for selective NMR imaging of chemically-shifted nuclei
US4591789A (en) * 1983-12-23 1986-05-27 General Electric Company Method for correcting image distortion due to gradient nonuniformity
US4612504A (en) * 1984-11-21 1986-09-16 General Electric Company Method for removing the effects of baseline error components in NMR imaging applications
FR2574551B1 (fr) * 1984-12-12 1986-12-26 Commissariat Energie Atomique Procede de generation et de traitement de signaux pour l'obtention par resonance magnetique nucleaire d'une image exempte de distorsions a partir d'un champ de polarisation inhomogene

Also Published As

Publication number Publication date
US4647858A (en) 1987-03-03
JPS6264351A (ja) 1987-03-23
EP0210562A3 (de) 1987-09-09
EP0210562A2 (de) 1987-02-04

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