IL123254A - Method to reduce eddy current effects in diffusion-weighted echo planar imaging - Google Patents

Method to reduce eddy current effects in diffusion-weighted echo planar imaging

Info

Publication number
IL123254A
IL123254A IL12325498A IL12325498A IL123254A IL 123254 A IL123254 A IL 123254A IL 12325498 A IL12325498 A IL 12325498A IL 12325498 A IL12325498 A IL 12325498A IL 123254 A IL123254 A IL 123254A
Authority
IL
Israel
Prior art keywords
diffusion
eddy current
planar imaging
reduce eddy
echo planar
Prior art date
Application number
IL12325498A
Other languages
English (en)
Other versions
IL123254A0 (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 IL123254A0 publication Critical patent/IL123254A0/xx
Publication of IL123254A publication Critical patent/IL123254A/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
    • G01R33/54—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
    • G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
    • G01R33/56341—Diffusion imaging
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Signal Processing (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
IL12325498A 1997-02-22 1998-02-10 Method to reduce eddy current effects in diffusion-weighted echo planar imaging IL123254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/803,808 US5864233A (en) 1997-02-22 1997-02-22 Method to reduce eddy current effects in diffusion-weighted echo planar imaging

Publications (2)

Publication Number Publication Date
IL123254A0 IL123254A0 (en) 1998-09-24
IL123254A true IL123254A (en) 2000-10-31

Family

ID=25187477

Family Applications (1)

Application Number Title Priority Date Filing Date
IL12325498A IL123254A (en) 1997-02-22 1998-02-10 Method to reduce eddy current effects in diffusion-weighted echo planar imaging

Country Status (4)

Country Link
US (1) US5864233A (xx)
JP (1) JP4121175B2 (xx)
DE (1) DE19807306B4 (xx)
IL (1) IL123254A (xx)

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US6175236B1 (en) * 1998-03-25 2001-01-16 General Electric Company Method for acquiring spatially and spectrally selective MR images
US6192263B1 (en) * 1998-09-01 2001-02-20 General Electric Company Phase-sensitive inversion recovery method of MR imaging
JP2002530173A (ja) * 1998-11-25 2002-09-17 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 磁気共鳴方法及び装置
US6323646B1 (en) 1999-05-21 2001-11-27 General Electric Company Method and apparatus for producing diffusion weighted MR images
US6239599B1 (en) 1999-05-21 2001-05-29 General Electric Company Method and apparatus for identifying errors in magnetic resonance imaging examinations
US6271666B1 (en) * 1999-05-21 2001-08-07 General Electric Company Filtering of oscillatory B0 behavior in NMR devices
US6313630B1 (en) * 1999-08-25 2001-11-06 Ge Medical Systems Global Technology Company Llc Modular gradient system for MRI system
US6380738B1 (en) 1999-11-15 2002-04-30 Ge Medical Systems Global Technology Company, Llc Method and apparatus for reducing image artifacts caused by magnet vibration in an MR imaging system
US6329821B1 (en) 1999-11-15 2001-12-11 Ge Medical Systems Global Technology Company, Llc Method and apparatus to compensate for image artifacts caused by magnet vibration in an MR imaging system
WO2001038895A1 (en) 1999-11-24 2001-05-31 Board Of Regents, The University Of Texas System Methods and systems for generating tractograms
US6448773B1 (en) 2000-02-24 2002-09-10 Toshiba America Mri, Inc. Method and system for measuring and compensating for eddy currents induced during NMR imaging operations
US6933720B2 (en) * 2001-12-11 2005-08-23 Toshiba America Mri, Inc. Sequence preconditioning for ultra-fast magnetic resonance imaging
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
DE10250922B4 (de) * 2002-10-31 2008-01-31 Siemens Ag Verfahren zur Ermittlung des ADC-Koeffizienten in der Diffusionsgewichteten Magnetresonanz-Bildgebung bei Verwendung von Steady-State-Sequenzen
JP3930439B2 (ja) * 2003-02-06 2007-06-13 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー 渦電流補正方法および磁気共鳴撮影装置
JP4820063B2 (ja) * 2004-03-24 2011-11-24 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー 磁気共鳴イメージング装置
US7112964B2 (en) * 2004-08-02 2006-09-26 General Electric Company Eddy current measurement and correction in magnetic resonance imaging systems with a static phantom
US7218110B2 (en) * 2005-09-02 2007-05-15 Toshiba America Mri, Inc. Method and apparatus for diffusion magnetic resonance imaging with the effects of eddy currents compensated
US7239140B1 (en) * 2005-12-21 2007-07-03 General Electric Company Method and apparatus for vibration-related artifact reduction
JP4134187B2 (ja) 2006-03-23 2008-08-13 ザイオソフト株式会社 拡散強調画像処理装置及び画像処理プログラム
JP5883207B2 (ja) * 2007-12-28 2016-03-09 株式会社東芝 磁気共鳴イメージング装置および磁気共鳴イメージング装置の制御プログラム
DE102009003889B3 (de) * 2009-01-02 2010-09-02 Siemens Aktiengesellschaft Verfahren und Vorrichtung zur Reduktion von Verzerrungen in der Diffusionsbildgebung
DE102010035539B4 (de) 2010-08-26 2012-04-05 Siemens Aktiengesellschaft Verfahren zur Kompensation von Wirbelstromfeldern in Magnetresonanzaufnahmen und Magnetresonanzeinrichtung
JP5971683B2 (ja) 2011-03-15 2016-08-17 東芝メディカルシステムズ株式会社 磁気共鳴イメージング装置
US8942945B2 (en) 2011-04-19 2015-01-27 General Electric Company System and method for prospective correction of high order eddy-current-induced distortion in diffusion-weighted echo planar imaging
JP6139119B2 (ja) * 2012-01-13 2017-05-31 東芝メディカルシステムズ株式会社 磁気共鳴イメージング装置
CN104854471B (zh) * 2012-12-12 2018-10-26 皇家飞利浦有限公司 针对磁共振弥散加权成像(dwi)的运动检测与校正方法
US9709653B2 (en) 2013-02-19 2017-07-18 Toshiba Medical Systems Corporation Mapping eddy current fields in MRI system
CA3125092A1 (en) 2018-12-28 2020-07-02 Hyperfine, Inc. Correcting for hysteresis in magnetic resonance imaging
CN109765512B (zh) * 2019-01-18 2021-09-17 上海联影医疗科技股份有限公司 磁共振梯度系统及其涡流补偿方法及装置
US20220123947A1 (en) 2019-01-18 2022-04-21 Zeu Technologies, Inc. A Method for Generating Random Numbers in Blockchain Smart Contracts
CN114556128A (zh) * 2019-08-15 2022-05-27 海珀菲纳运营有限公司 涡流缓解系统和方法

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JP3144840B2 (ja) * 1991-07-31 2001-03-12 株式会社東芝 磁気共鳴イメージング装置
DE69211806T2 (de) * 1991-10-25 1996-10-31 Univ Queensland Korrektur von Signalverzerrungen in einem magnetischen Kernresonanzapparat
DE69326202T2 (de) * 1992-06-29 2000-04-13 Koninkl Philips Electronics Nv Verfahren und Gerät zur Kernresonanzabbildung
JP3193467B2 (ja) * 1992-07-31 2001-07-30 ジーイー横河メディカルシステム株式会社 Ｍｒｉ装置
DE69329873T2 (de) * 1992-10-26 2001-09-13 Koninkl Philips Electronics Nv Kompensierung von Wirbelströmen in der Bilderzeugung mittels magnetischer Resonanz
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US5378985A (en) * 1993-07-15 1995-01-03 General Electric Company Fast spin echo prescan for MRI system
DE4325031C1 (de) * 1993-07-26 1994-11-03 Siemens Ag Verfahren zur Erfassung von durch Gradienten verursachten Wirbelstrom-Magnetfeldern in einem Kernspinresonanzgerät
EP0644437B1 (en) * 1993-09-16 1999-05-12 Koninklijke Philips Electronics N.V. Correction of read-gradient polarity in EPI and GRASE MRI
JP3507586B2 (ja) * 1995-06-09 2004-03-15 株式会社東芝 磁気共鳴イメージング装置
GB9513544D0 (en) * 1995-07-04 1995-09-06 Marconi Gec Ltd Magnetic resonance methods and apparatus

Also Published As

Publication number Publication date
DE19807306B4 (de) 2010-10-14
JP4121175B2 (ja) 2008-07-23
US5864233A (en) 1999-01-26
DE19807306A1 (de) 1998-08-27
JPH10332645A (ja) 1998-12-18
IL123254A0 (en) 1998-09-24

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Legal Events

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FF Patent granted
KB Patent renewed
RH1 Patent not in force