ATE39575T1 - Wirbelfeldunterdrueckungseinrichtung fuer eine magnetische kernresonanzapparatur. - Google Patents

Wirbelfeldunterdrueckungseinrichtung fuer eine magnetische kernresonanzapparatur.

Info

Publication number
ATE39575T1
ATE39575T1 AT85302730T AT85302730T ATE39575T1 AT E39575 T1 ATE39575 T1 AT E39575T1 AT 85302730 T AT85302730 T AT 85302730T AT 85302730 T AT85302730 T AT 85302730T AT E39575 T1 ATE39575 T1 AT E39575T1
Authority
AT
Austria
Prior art keywords
gradient
eddy
field
switching
magnetic resonance
Prior art date
Application number
AT85302730T
Other languages
English (en)
Inventor
David C Flugan
Original Assignee
Technicare Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24409186&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE39575(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Technicare Corp filed Critical Technicare Corp
Application granted granted Critical
Publication of ATE39575T1 publication Critical patent/ATE39575T1/de

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
    • G01R33/385—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
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
AT85302730T 1984-04-19 1985-04-18 Wirbelfeldunterdrueckungseinrichtung fuer eine magnetische kernresonanzapparatur. ATE39575T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/601,897 US4585995A (en) 1984-04-19 1984-04-19 Nuclear magnetic resonance eddy field suppression apparatus
EP85302730A EP0164199B1 (de) 1984-04-19 1985-04-18 Wirbelfeldunterdrückungseinrichtung für eine magnetische Kernresonanzapparatur

Publications (1)

Publication Number Publication Date
ATE39575T1 true ATE39575T1 (de) 1989-01-15

Family

ID=24409186

Family Applications (1)

Application Number Title Priority Date Filing Date
AT85302730T ATE39575T1 (de) 1984-04-19 1985-04-18 Wirbelfeldunterdrueckungseinrichtung fuer eine magnetische kernresonanzapparatur.

Country Status (4)

Country Link
US (1) US4585995A (de)
EP (1) EP0164199B1 (de)
AT (1) ATE39575T1 (de)
DE (1) DE3567104D1 (de)

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US4703275A (en) * 1985-07-25 1987-10-27 Picker International, Inc. Method and apparatus to compensate for eddy currents in magnetic resonance imaging
EP0216523A3 (de) * 1985-08-27 1989-04-05 Resonex, Inc. Verfahren zur nichtorthogonalen Bilderzeugung mittels magnetischer Kernresonanz
US4743851A (en) * 1985-08-27 1988-05-10 Resonex, Inc. Apparatus and method for creating non-orthogonal magnetic resonance imaging
US4713615A (en) * 1985-08-30 1987-12-15 Resonex, Inc. Quantization error reduction method for phase encode gradient in NMR imaging
US4698591A (en) * 1986-01-03 1987-10-06 General Electric Company Method for magnetic field gradient eddy current compensation
US4733189A (en) * 1986-06-03 1988-03-22 Massachusetts Institute Of Technology Magnetic resonance imaging systems
JPS63229039A (ja) * 1987-03-18 1988-09-22 株式会社東芝 磁気共鳴イメ−ジング装置
NL8701948A (nl) * 1987-08-19 1989-03-16 Philips Nv Magnetisch resonantie-apparaat met verbeterd gradient spoelenstelsel.
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
US4928063A (en) * 1987-11-09 1990-05-22 Picker International, Inc. Automatic eddy current correction
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
US4950994A (en) * 1988-03-07 1990-08-21 General Electric Company Gradient and polarizing field compensation
GB8818087D0 (en) * 1988-07-29 1988-09-01 Univ Southampton Improvements in/relating to attenuation of electro-magnetic field components
NL8802212A (nl) * 1988-09-08 1990-04-02 Philips Nv Werkwijze en inrichting voor wervelstroomcompensatie in mr apparaten.
DE3938167A1 (de) * 1988-11-28 1990-05-31 Siemens Ag Gradientenspulen-system fuer einen kernspintomographen
JPH02264636A (ja) * 1988-12-23 1990-10-29 Picker Internatl Ltd 核磁気共鳴方法
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
US5313945A (en) * 1989-09-18 1994-05-24 Noise Cancellation Technologies, Inc. Active attenuation system for medical patients
JPH03173531A (ja) * 1989-12-01 1991-07-26 Hitachi Ltd 磁気共鳴イメージング装置の渦電流補償方法及び渦電流補償装置
WO1991019992A1 (en) * 1990-06-13 1991-12-26 Advanced Nmr Systems, Inc. Circuitry for driving field-generating coil of magnetic resonance imaging system
DE4020213C2 (de) * 1990-06-25 1993-10-07 Siemens Ag Stromversorgung für eine Gradientenspule eines Kernresonanz-Abbildungssystems
DE59108295D1 (de) * 1990-09-20 1996-11-28 Siemens Ag Kernspintomograph
EP0533173B1 (de) * 1991-09-19 1996-11-20 Kabushiki Kaisha Toshiba Verfahren und Apparat zur Bilderzeugung mittels magnetischer Resonanz mit der Möglichkeit der Kompensation von durch Wirbelströme gestörten Gradientenfeldern
GB9200812D0 (en) * 1992-01-15 1992-03-11 Oxford Instr Uk Ltd Gradient field control
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
DE4313392C2 (de) * 1993-04-23 1995-06-22 Siemens Ag Verfahren zur Kompensation von durch Gradienten verursachten Wirbelströmen bei Kernspinresonanzgeräten
US5929638A (en) * 1996-08-07 1999-07-27 U.S. Philips Corporation MR method and device for carrying out the method
WO1999028757A1 (en) * 1997-11-28 1999-06-10 Koninklijke Philips Electronics N.V. Magnetic resonance apparatus provided with force-optimized gradient coils
US6127826A (en) * 1999-01-27 2000-10-03 Picker International, Inc. EPI image based long term eddy current pre-emphasis calibration
DE19947360C1 (de) 1999-10-01 2001-05-03 Siemens Ag Verfahren zur Vorgabe einer Sollgröße für ein Gradientenfeld
JP2002253532A (ja) 2000-12-21 2002-09-10 Siemens Ag 磁気共鳴装置
DE10109543B4 (de) 2001-02-28 2006-03-30 Siemens Ag Verfahren zum Betrieb eines Gradientenspulensystems eines Magnetresonanzgeräts
DE10200861A1 (de) * 2002-01-11 2003-07-31 Siemens Ag Magnetresonanzgerät mit einem Wirbelstromerzeuger
US6903552B2 (en) 2003-02-12 2005-06-07 Siemens Aktiengesellschaft Magnetic resonance apparatus with eddy current compensation
DE10306017A1 (de) * 2003-02-13 2004-09-09 Siemens Ag Verfahren zum Ermitteln einer Kompensationseinstellung für ein Wirbelstromfeld
DE102006001194B4 (de) * 2006-01-10 2008-12-11 Bruker Biospin Gmbh Verfahren zur Ansteuerung eines Netzgeräts einer Magnetspule mittels automatischer digitaler Preemphasis für dynamische NMR-Magnetfelder durch digitale IIR-Filter
CN101256221B (zh) * 2007-02-28 2010-09-29 西门子（中国）有限公司 一种减小梯度磁场导致的涡流的方法
DE102010035539B4 (de) * 2010-08-26 2012-04-05 Siemens Aktiengesellschaft Verfahren zur Kompensation von Wirbelstromfeldern in Magnetresonanzaufnahmen und Magnetresonanzeinrichtung
JP2012183233A (ja) 2011-03-07 2012-09-27 Toshiba Corp 磁気共鳴イメージング装置
US9279871B2 (en) 2011-12-20 2016-03-08 General Electric Company System and apparatus for compensating for magnetic field distortion in an MRI system
US9322892B2 (en) 2011-12-20 2016-04-26 General Electric Company System for magnetic field distortion compensation and method of making same
US9274188B2 (en) 2012-11-30 2016-03-01 General Electric Company System and apparatus for compensating for magnetic field distortion in an MRI system
CN204394510U (zh) * 2015-01-06 2015-06-17 西门子(深圳)磁共振有限公司 梯度线圈的检测装置和磁共振成像系统
KR101734998B1 (ko) * 2015-08-31 2017-05-12 삼성전자주식회사 자기공명영상장치 및 그 제어방법
DE102017213026A1 (de) * 2017-07-28 2019-01-31 Siemens Healthcare Gmbh Gradientenspule zur Erzeugung eines Magnetfeldgradienten und eines Magnetfeldes höherer Ordnung
CN110646756B (zh) * 2019-09-30 2025-06-24 武汉中科牛津波谱技术有限公司 一种核磁共振梯度功率放大器的静态电流消除电路及方法
DE102019215046B4 (de) * 2019-09-30 2023-09-21 Siemens Healthcare Gmbh Verfahren zur Kompensation von Wirbelströmen bei einer Erfassung von Messdaten mittels Magnetresonanz

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US4442404A (en) * 1978-12-19 1984-04-10 Bergmann Wilfried H Method and means for the noninvasive, local, in-vivo examination of endogeneous tissue, organs, bones, nerves and circulating blood on account of spin-echo techniques
DE3123493A1 (de) * 1981-06-13 1982-12-30 Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten Elektromagnet fuer die nmr-tomographie
US4456881A (en) * 1982-01-18 1984-06-26 Technicare Corporation Gradient-coil apparatus for a magnetic resonance system
US4607225A (en) * 1983-07-19 1986-08-19 Regents Of The University Of California Apparatus and method for reducing spurious currents in NMR imaging apparatus induced by pulsed gradient fields

Also Published As

Publication number Publication date
EP0164199B1 (de) 1988-12-28
DE3567104D1 (en) 1989-02-02
EP0164199A1 (de) 1985-12-11
US4585995A (en) 1986-04-29

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