DE69219087T2 - Verminderung der Wechselwirkung der Gradientenspulen mit den sich an Zimmertemperatur befindenden Ausgleichsspulen - Google Patents

Verminderung der Wechselwirkung der Gradientenspulen mit den sich an Zimmertemperatur befindenden Ausgleichsspulen

Info

Publication number
DE69219087T2
DE69219087T2 DE69219087T DE69219087T DE69219087T2 DE 69219087 T2 DE69219087 T2 DE 69219087T2 DE 69219087 T DE69219087 T DE 69219087T DE 69219087 T DE69219087 T DE 69219087T DE 69219087 T2 DE69219087 T2 DE 69219087T2
Authority
DE
Germany
Prior art keywords
coils
interaction
reduction
room temperature
compensation
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE69219087T
Other languages
English (en)
Other versions
DE69219087D1 (de
Inventor
Evan H Williams
Norbert Schuff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Varian Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Publication of DE69219087D1 publication Critical patent/DE69219087D1/de
Application granted granted Critical
Publication of DE69219087T2 publication Critical patent/DE69219087T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G01R33/3875—Compensation of inhomogeneities using correction coil assemblies, e.g. active shimming
    • 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
    • G01R33/3852—Gradient amplifiers; means for controlling the application of a gradient magnetic field to the sample, e.g. a gradient signal synthesizer

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
DE69219087T 1991-12-19 1992-12-18 Verminderung der Wechselwirkung der Gradientenspulen mit den sich an Zimmertemperatur befindenden Ausgleichsspulen Expired - Fee Related DE69219087T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/811,442 US5250902A (en) 1991-12-19 1991-12-19 Reduction of gradient coil interaction with room temperature shims

Publications (2)

Publication Number Publication Date
DE69219087D1 DE69219087D1 (de) 1997-05-22
DE69219087T2 true DE69219087T2 (de) 1997-07-24

Family

ID=25206564

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69219087T Expired - Fee Related DE69219087T2 (de) 1991-12-19 1992-12-18 Verminderung der Wechselwirkung der Gradientenspulen mit den sich an Zimmertemperatur befindenden Ausgleichsspulen

Country Status (4)

Country Link
US (1) US5250902A (de)
EP (1) EP0547917B1 (de)
JP (1) JP3327603B2 (de)
DE (1) DE69219087T2 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698176B1 (fr) * 1992-11-16 1995-01-27 Sadis Bruker Spectrospin Dispositif de commutation et procédé de commande mettant en Óoeuvre ledit dispositif.
US6111371A (en) * 1998-08-07 2000-08-29 Thomson Multimedia S.A. Switch control signal generator
JP3937244B2 (ja) * 1998-12-03 2007-06-27 三菱電機株式会社 サーボシステムコントローラ
DE19910018C1 (de) * 1999-03-08 2000-10-19 Siemens Ag Verfahren zum Betrieb eines Magnetresonanztomographiegeräts
WO2004111671A1 (en) * 2003-06-19 2004-12-23 Koninklijke Philips Electronics N.V. Method for shimming a main magnetic field in magnetic resonance
DE102005033955A1 (de) 2005-07-20 2007-02-01 Siemens Ag Magnetresonanzeinrichtung umfassend eine zylindrische Gradientenspule
CN101034152B (zh) * 2007-03-02 2010-05-19 华东师范大学 一种消除数字梯度信号时间抖动的方法
DE102011080275B4 (de) * 2011-08-02 2018-10-25 Siemens Healthcare Gmbh Lokalspule, insbesondere Halsspule, mit mehreren separat schaltbaren Lokalspulen- Shimspulen
US10921398B2 (en) 2017-05-25 2021-02-16 Synaptive Medical Inc. System and method for using coils in magnetic resonance imaging

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPH0246882Y2 (de) * 1984-11-13 1990-12-11
DE3511303A1 (de) * 1985-03-28 1986-10-02 Spectrospin AG, Fällanden, Zürich Verfahren und vorrichtung zum homogenisieren des feldes einer magnetspule
EP0307516A1 (de) * 1987-09-18 1989-03-22 Koninklijke Philips Electronics N.V. Magnetresonanzabbildungsgerät mit Korrektionssystem für Wirbelströmeeffekte
JPH01181855A (ja) * 1988-01-13 1989-07-19 Toshiba Corp 磁気共鳴イメージング装置
DE3937150A1 (de) * 1989-11-08 1991-05-23 Bruker Analytische Messtechnik Kernresonanzspektrometer
US5105153A (en) * 1990-06-04 1992-04-14 General Electric Company Gradient speed-up circuit for nmr system

Also Published As

Publication number Publication date
JP3327603B2 (ja) 2002-09-24
JPH05277087A (ja) 1993-10-26
US5250902A (en) 1993-10-05
EP0547917B1 (de) 1997-04-16
DE69219087D1 (de) 1997-05-22
EP0547917A1 (de) 1993-06-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8327 Change in the person/name/address of the patent owner

Owner name: VARIAN, INC., PALO ALTO, CALIF., US

8339 Ceased/non-payment of the annual fee