FI844515A0 - Foerfarande foer korrigering av bildfoervraengning foerorsakad av gradientoenhetlighet. - Google Patents

Foerfarande foer korrigering av bildfoervraengning foerorsakad av gradientoenhetlighet.

Info

Publication number
FI844515A0
FI844515A0 FI844515A FI844515A FI844515A0 FI 844515 A0 FI844515 A0 FI 844515A0 FI 844515 A FI844515 A FI 844515A FI 844515 A FI844515 A FI 844515A FI 844515 A0 FI844515 A0 FI 844515A0
Authority
FI
Finland
Prior art keywords
korrigering
gradientoenhetlighet
foerorsakad
bildfoervraengning
foerfarande foer
Prior art date
Application number
FI844515A
Other languages
English (en)
Other versions
FI844515L (fi
Inventor
Gary Harold Glover
Norbert Joseph Pelc
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 FI844515A0 publication Critical patent/FI844515A0/fi
Publication of FI844515L publication Critical patent/FI844515L/fi

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
    • G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • High Energy & Nuclear Physics (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Image Processing (AREA)
FI844515A 1983-12-23 1984-11-16 Foerfarande foer korrigering av bildfoervraengning foerorsakad av gradientoenhetlighet. FI844515L (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/565,256 US4591789A (en) 1983-12-23 1983-12-23 Method for correcting image distortion due to gradient nonuniformity

Publications (2)

Publication Number Publication Date
FI844515A0 true FI844515A0 (fi) 1984-11-16
FI844515L FI844515L (fi) 1985-06-24

Family

ID=24257827

Family Applications (1)

Application Number Title Priority Date Filing Date
FI844515A FI844515L (fi) 1983-12-23 1984-11-16 Foerfarande foer korrigering av bildfoervraengning foerorsakad av gradientoenhetlighet.

Country Status (6)

Country Link
US (1) US4591789A (fi)
EP (1) EP0146873A3 (fi)
JP (1) JPS60209154A (fi)
KR (1) KR850004639A (fi)
FI (1) FI844515L (fi)
IL (1) IL73675A0 (fi)

Families Citing this family (77)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60189905A (ja) * 1984-03-09 1985-09-27 Mitsubishi Electric Corp 高均一磁界発生装置
JPS6148752A (ja) * 1984-08-17 1986-03-10 Hitachi Ltd 核磁気共鳴を用いた検査装置
JPS61194338A (ja) * 1985-02-25 1986-08-28 Yokogawa Electric Corp 核磁気共鳴撮像装置の位相およびシエ−デイング補正方法
US4668915A (en) * 1985-03-15 1987-05-26 Honda Giken Kogyo Kabushiki Kaisha Non-uniform field magnetic resonance dual patient imaging system
DE3614142C2 (de) * 1985-04-26 1996-03-28 Toshiba Kawasaki Kk Verwendung eines Materials für die Diagnose durch Kernresonanz-Spektroskopie
US4678996A (en) * 1985-05-07 1987-07-07 Picker International, Inc. Magnetic resonance imaging method
US4736160A (en) * 1985-05-29 1988-04-05 Hitachi, Ltd. Nuclear magnetic resonance imaging method
US4724388A (en) * 1985-06-07 1988-02-09 Hitachi, Ltd. Magnetic resonance imaging method
US4647858A (en) * 1985-07-29 1987-03-03 General Electric Company Methods for overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging
US4716368A (en) * 1985-08-09 1987-12-29 Picker International, Inc. Magnetic resonance reconstruction and scanning techniques using known information, constraints, and symmetry relations
US4724386A (en) * 1985-09-30 1988-02-09 Picker International, Inc. Centrally ordered phase encoding
US4841248A (en) * 1985-08-14 1989-06-20 Picker International, Inc. Transverse field limited localized coil for magnetic resonance imaging
US4663591A (en) * 1985-08-16 1987-05-05 General Electric Company Method for reducing image artifacts due to periodic signal variations in NMR imaging
NL8502340A (nl) * 1985-08-26 1987-03-16 Philips Nv Magnetisch resonantie apparaat met veld homogeniserende magnetische elementen.
EP0216523A3 (en) * 1985-08-27 1989-04-05 Resonex, Inc. Process for non-orthogonal nmr imaging
US4713615A (en) * 1985-08-30 1987-12-15 Resonex, Inc. Quantization error reduction method for phase encode gradient in NMR imaging
US4720679A (en) * 1985-12-31 1988-01-19 Picker International, Inc. Magnetic resonance imaging with phase encoded chemical shift correction
JPS62176443A (ja) * 1986-01-29 1987-08-03 横河メディカルシステム株式会社 Ｎｍｒ画像の位置・濃度歪補正装置
JPS62176444A (ja) * 1986-01-29 1987-08-03 横河メディカルシステム株式会社 核磁気共鳴撮像装置の静磁場強度分布測定装置
JPS62179449A (ja) * 1986-01-31 1987-08-06 横河メディカルシステム株式会社 核磁気共鳴画像の歪補正装置
US4731865A (en) * 1986-03-27 1988-03-15 General Electric Company Digital image correction
JPS6321048A (ja) * 1986-07-16 1988-01-28 横河メディカルシステム株式会社 核磁気共鳴画像の歪み補正方法
IL80727A (en) * 1986-11-21 1990-06-10 Elscint Ltd Noise reduction in magnetic resonance images
US4876509A (en) * 1986-12-17 1989-10-24 Resonex, Inc. Image restoration process for magnetic resonance imaging resonance imaging
US4761614A (en) * 1987-04-27 1988-08-02 Phospho-Energetics, Inc. Device and method for automatic shimming of NMR instrument
US4761613A (en) * 1987-08-12 1988-08-02 Picker International, Inc. Monitored echo gating for the reduction of motion artifacts
US5023554A (en) * 1989-05-22 1991-06-11 The Reagents Of The University Of California Fringe field MRI
DE4091345T1 (de) * 1989-08-04 1991-08-29 Hitachi Ltd Verfahren und vorrichtung zur bildrekonstruktion in einem abbildungsgeraet mit magnetischer resonanz
JPH0649034B2 (ja) * 1989-08-04 1994-06-29 株式会社日立メディコ 磁気共鳴イメージング装置における画像再構成方法
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
NL8903066A (nl) * 1989-12-14 1991-07-01 Philips Nv Magnetisch resonantie apparaat met beeldfout reductie.
US5204625A (en) * 1990-12-20 1993-04-20 General Electric Company Segmentation of stationary and vascular surfaces in magnetic resonance imaging
GB9112290D0 (en) * 1991-06-07 1991-07-24 Nat Res Dev Methods and apparatus for nqr imaging
DE4333222B4 (de) * 1993-09-30 2006-08-17 Siemens Ag Magnetresonanzgerät mit einer eine Interpolationseinheit aufweisenden Signalverarbeitungseinheit
US5498963A (en) * 1994-08-05 1996-03-12 General Electric Company Correction of geometric distortion in MRI phase and phase difference images
US5545995A (en) * 1994-11-29 1996-08-13 General Electric Company Measurement of geometric distortion in MRI images
US5642047A (en) * 1995-12-08 1997-06-24 General Electric Company Method for correcting MR phase information image data
US5770943A (en) * 1996-12-30 1998-06-23 General Electric Company Method for measuring and compensating for spatially and temporally varying magnetic fields induced by eddy currents
US5998996A (en) * 1997-03-27 1999-12-07 General Electric Company Correction of artifacts caused by Maxwell terms in phase contrast angiography
US5877629A (en) * 1997-04-08 1999-03-02 General Electric Company Correction for maxwell fields produced during non-rectilinear k-space sampling
US6043652A (en) * 1997-04-17 2000-03-28 Picker International, Inc. Alternative reconstruction method for non-equidistant k-space data
US5917323A (en) * 1997-07-01 1999-06-29 General Electric Company Correction of axial image signal fall off caused by Maxwell terms
US6025715A (en) * 1997-12-15 2000-02-15 King; Kevin F. Method for compensating an MRI system for time dependent gradient field distortion
US6163152A (en) * 1998-06-15 2000-12-19 General Electric Company Method and system for correcting errors in MR images due to regions of gradient non-uniformity for parametric imaging such as quantitative flow analysis
US6211675B1 (en) 1998-11-12 2001-04-03 General Electric Company Automatic measurement of gradient field distortion
US6636756B2 (en) 1999-11-30 2003-10-21 General Electric Company K-space synthesis for MR imaging in the presence of gradient field nonlinearity
US6462544B1 (en) 2000-10-24 2002-10-08 General Electric Company Magnetic resonance imaging apparatus
US6342787B1 (en) 2000-11-22 2002-01-29 Philips Medical Systems (Cleveland) Real-time multi-axis gradient distortion correction using an interactive shim set
US6707300B2 (en) 2002-05-17 2004-03-16 Ge Medical Systems Global Technology Co., Llc Gradient non-linearity compensation in moving table MRI
US6670812B1 (en) 2002-09-13 2003-12-30 Ge Medical Systems Global Technology, Llc B-value calculation and correction using a linear segment gradient waveform model
US6969991B2 (en) * 2002-12-11 2005-11-29 The Board Of Trustees Of The Leland Stanford Junior University Correction of the effect of spatial gradient field distortions in diffusion-weighted imaging
US7202662B2 (en) * 2002-12-11 2007-04-10 The Board Of Trustees Of The Leland Stanford Junior University Correction of the effect of gradient field non-linearities in phase contrast MRI
AU2002953540A0 (en) * 2002-12-24 2003-01-16 The University Of Queensland Correction of non-linear gradients effects on magnetic resonance imaging
US6836113B2 (en) * 2003-01-22 2004-12-28 Toshiba America Mri, Inc. Measurement and correction of gradient-induced cross-term magnetic fields in an EPI sequence
DE10337241B4 (de) * 2003-08-13 2008-05-29 Siemens Ag Verzeichnungskorrigierte Magnetresonanzmessung und Magnetresonanzgerät
US6975113B1 (en) 2003-11-25 2005-12-13 General Electric Company Method and system for moving table MRI with partial fourier imaging
JP2007534414A (ja) * 2004-04-28 2007-11-29 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ コントラスト操作および／またはスキャンパラメータ更新を含む連続移動テーブルｍｒｉ
DE102005030795B4 (de) 2004-07-01 2009-07-23 Siemens Ag Verfahren zur Positionierung einer zu messenden Schicht bei einer Magnetresonanzmessung
DE102006033248B4 (de) 2006-07-18 2009-10-22 Siemens Ag Verfahren zur Transformation eines verzeichnungskorrigierten Magnetresonanzbilds, Verfahren zur Durchführung von Magnetresonanzmessungen und Bildtransformationseinheit
US8086068B2 (en) * 2008-04-03 2011-12-27 Miranda Technologies Inc. Method and apparatus for providing an indication of a level of distortion created by blocking artifacts
DE102008018265B4 (de) 2008-04-10 2011-12-08 MRB Forschungszentrum für Magnet - Resonanz - Bayern e.V. Gradientensystem, Kernspinresonanzapparatur, Verfahren zum Erzeu-gen eines bestimmten Gradientenfelds und Computer-Programm
DE102008046267B4 (de) 2008-09-08 2011-04-07 Siemens Aktiengesellschaft Bildverzeichnungskorrektur bei kontinuierlicher Tischbewegung
DE102009021242B4 (de) 2009-05-14 2011-06-16 Siemens Aktiengesellschaft Verfahren und Vorrichtung zur Steuerung eines Ablaufs einer MR-Messung bei einer Magnetresonanzanlage
US8970217B1 (en) 2010-04-14 2015-03-03 Hypres, Inc. System and method for noise reduction in magnetic resonance imaging
DE102010044520A1 (de) * 2010-09-07 2012-03-08 Siemens Aktiengesellschaft Verfahren zum Abbilden eines Teilbereichs eines Untersuchungsobjekts in einer Magnetresonanzanlage
DE102011006436A1 (de) * 2011-03-30 2012-10-04 Siemens Aktiengesellschaft Verfahren zur Korrektur einer Verzeichnung in einer Magnetresoanzaufnahme
JP2013248081A (ja) * 2012-05-31 2013-12-12 Ge Medical Systems Global Technology Co Llc 磁気共鳴装置、画像データ補正方法、およびプログラム
KR101967244B1 (ko) 2012-12-05 2019-04-09 삼성전자주식회사 자기 공명 영상 방법 및 장치
US9897678B2 (en) 2013-04-19 2018-02-20 General Electric Company Magnetic resonance imaging data correction methods and systems
US9581671B2 (en) * 2014-02-27 2017-02-28 Toshiba Medical Systems Corporation Magnetic resonance imaging with consistent geometries
EP3134747B1 (en) * 2014-04-25 2021-12-01 Mayo Foundation for Medical Education and Research Integrated image reconstruction and gradient non-linearity correction for magnetic resonance imaging
DE102015218847A1 (de) 2015-09-30 2017-03-30 Siemens Healthcare Gmbh Korrektur von Magnetresonanzbilddaten
DE102017208335A1 (de) 2017-05-17 2018-11-22 Siemens Healthcare Gmbh Korrektur mehrerer Verzerrungseffekte bei der MR-Bildgebung
DE102017212398A1 (de) 2017-07-19 2019-01-24 Siemens Healthcare Gmbh Rekonstruktion von MR-Bildern bei von der Erfassungsposition verschiedener Position
US11307280B2 (en) 2018-06-01 2022-04-19 Mayo Foundation For Medical Education And Research Methods for correcting motion-encoding gradient nonlinearities in magnetic resonance elastography
US11041921B2 (en) * 2018-11-29 2021-06-22 Canon Medical Systems Corporation MRI apparatus, image processing apparatus, and MRI method
US12085631B2 (en) 2019-04-26 2024-09-10 May Foundation For Medical Education And Research Model-based iterative reconstruction for magnetic resonance imaging with echo planar readout

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4296378A (en) * 1979-04-05 1981-10-20 Southwest Research Institute Apparatus providing enhanced detection of specimens in inhomogeneous fields
US4355282A (en) * 1979-08-03 1982-10-19 Picker International Limited Nuclear magnetic resonance systems
DE3043703C2 (de) * 1980-11-19 1983-01-20 Siemens AG, 1000 Berlin und 8000 München Röntgendiagnostikeinrichtung zur Erstellung von Subtraktionsbildern
JPS59148854A (ja) * 1983-02-14 1984-08-25 Hitachi Ltd 核磁気共鳴を用いた検査装置
JPS59190643A (ja) * 1983-04-14 1984-10-29 Hitachi Ltd 核磁気共鳴を用いた検査装置

Also Published As

Publication number Publication date
EP0146873A2 (en) 1985-07-03
JPH0350544B2 (fi) 1991-08-02
US4591789A (en) 1986-05-27
IL73675A0 (en) 1985-02-28
EP0146873A3 (en) 1987-04-01
JPS60209154A (ja) 1985-10-21
KR850004639A (ko) 1985-07-25
FI844515L (fi) 1985-06-24

Similar Documents

Publication Publication Date Title
FI832091L (fi) Foerfarande foer vidareutveckling av nervmuskelanslutnings maetning.
FI844515A0 (fi) Foerfarande foer korrigering av bildfoervraengning foerorsakad av gradientoenhetlighet.
FI833260A (fi) Foerfarande foer tillverkning av en soemn.
FI83398B (fi) Foerfarande foer sammansvetsning av av metallskivor.
FI83399B (fi) Foerfarande foer svetsning av metallskiva.
FI833863A (fi) Saett foer destruktion av sopor.
FI834029A (fi) Foerfarande foer framstaellning av cellulosakarbamatfibrer eller -filmer.
FI831960L (fi) Vaeggkonstruktion foer utvaendig tillaeggsvaermeisolering av smaohus.
FI73953B (fi) Foerfarande foer framstaellning av jaernoxid.
FI832135L (fi) Foerfarande foer odling av matsvampar.
FI830239L (fi) Foerfarande foer regenerering av betningssyror.
FI841698A0 (fi) Stabila loesningar av basiskt aluminiumsulfat innehaollande flerkaerniga aluminiumhydroxidsulfatkomplex.
FI833361A (fi) Foerfarande foer behandling av kopparsulfid- eller kopparsulfid- och zinksulfidkoncentrat.
FI832190L (fi) Foerfarande foer framstaellning av en fylld kalandervals.
FI831817L (fi) Spolapparatur foer aostadkommande av homogent magnetfaelt.
FI832798A (fi) Anordning foer matning av traedstammar.
FI73528B (fi) Foerfarande foer kontrollering av en tvaofasig processmaelta av gjutmaessing.
FI831523L (fi) Anordning foer aostadkommande av en elektronridao.
FI832170L (fi) Foerfarande foer framstaellning av raokoppar.
FI832316L (fi) Anordning foer faestande av sondboll.
FI831866L (fi) Foerfarande foer framstaellning av 4- azaftalidfoereningar.
FI840029A (fi) Fastsaettning av en jaernvaegsskena.
FI832794A (fi) Buskbaerplockare av fordonstyp.
FI830756L (fi) Vaetske- eller gasbehaollare av staolbetongkonstruktion.
FI833547A (fi) Saett foer aktivering av en innanfoer en gasfylld proportionalraeknare anordnad stabilisator foer gasfas.

Legal Events

Date Code Title Description
FA Application withdrawn

Owner name: GENERAL ELECTRIC COMPANY