DE69429595T2 - Selbstabgeschirmte Gradientenspule kombiniert mit Ausgleichsanordnung - Google Patents

Selbstabgeschirmte Gradientenspule kombiniert mit Ausgleichsanordnung

Info

Publication number
DE69429595T2
DE69429595T2 DE69429595T DE69429595T DE69429595T2 DE 69429595 T2 DE69429595 T2 DE 69429595T2 DE 69429595 T DE69429595 T DE 69429595T DE 69429595 T DE69429595 T DE 69429595T DE 69429595 T2 DE69429595 T2 DE 69429595T2
Authority
DE
Germany
Prior art keywords
self
gradient coil
compensation arrangement
shielded gradient
coil combined
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
DE69429595T
Other languages
English (en)
Other versions
DE69429595D1 (de
Inventor
Michael A Morich
William H Amor
Gordon D Demeester
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.)
Philips Nuclear Medicine Inc
Original Assignee
Marconi Medical Systems 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 Marconi Medical Systems Inc filed Critical Marconi Medical Systems Inc
Application granted granted Critical
Publication of DE69429595D1 publication Critical patent/DE69429595D1/de
Publication of DE69429595T2 publication Critical patent/DE69429595T2/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
    • G01R33/3873—Compensation of inhomogeneities using ferromagnetic bodies ; Passive 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
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
    • 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
    • G01R33/38—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
    • G01R33/3856—Means for cooling the gradient coils or thermal shielding of the gradient 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
    • 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
    • G01R33/422—Screening of the radio frequency 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
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field
    • G01R33/4215—Screening of main or gradient magnetic field of the gradient magnetic field, e.g. using passive or active shielding of the gradient magnetic field

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Electromagnetism (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
DE69429595T 1993-06-21 1994-06-03 Selbstabgeschirmte Gradientenspule kombiniert mit Ausgleichsanordnung Expired - Fee Related DE69429595T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/080,566 US5349297A (en) 1992-03-27 1993-06-21 Combined self shielded gradient coil and shimset

Publications (2)

Publication Number Publication Date
DE69429595D1 DE69429595D1 (de) 2002-02-14
DE69429595T2 true DE69429595T2 (de) 2002-10-31

Family

ID=22158209

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69429595T Expired - Fee Related DE69429595T2 (de) 1993-06-21 1994-06-03 Selbstabgeschirmte Gradientenspule kombiniert mit Ausgleichsanordnung

Country Status (4)

Country Link
US (1) US5349297A (de)
EP (1) EP0629873B1 (de)
JP (1) JPH0795974A (de)
DE (1) DE69429595T2 (de)

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5554929A (en) * 1993-03-12 1996-09-10 Doty Scientific, Inc. Crescent gradient coils
US5886596A (en) * 1993-08-06 1999-03-23 Uab Research Foundation Radio frequency volume coils for imaging and spectroscopy
US5557247A (en) * 1993-08-06 1996-09-17 Uab Research Foundation Radio frequency volume coils for imaging and spectroscopy
US5545996A (en) * 1994-03-15 1996-08-13 Picker International, Inc. Gradient coil with cancelled net thrust force
US5532597A (en) * 1994-11-04 1996-07-02 Picker International, Inc. Passive shimming technique for MRI magnets
US5635839A (en) * 1994-11-04 1997-06-03 Picker International, Inc. High order passive shimming assembly for MRI magnets
JPH08196518A (ja) * 1995-01-20 1996-08-06 Toshiba Corp Ｍｒｉ装置
US5592087A (en) * 1995-01-27 1997-01-07 Picker International, Inc. Low eddy current radio frequency shield for magnetic resonance imaging
JPH08240651A (ja) * 1995-03-02 1996-09-17 Norin Suisansyo Nogyo Kenkyu Center Shocho 核磁気共鳴イメージング装置および方法
US5550472A (en) * 1995-04-13 1996-08-27 Picker International, Inc. Combined radio frequency coil with integral magnetic field shim set
GB2301674A (en) * 1995-06-01 1996-12-11 Hewlett Packard Co MRI magnet with superconducting gradient coils
US5585724A (en) * 1995-06-12 1996-12-17 Picker International, Inc. Magnetic resonance gradient coils with interstitial gap
US5744957A (en) * 1995-08-15 1998-04-28 Uab Research Foundation Cavity resonator for NMR systems
US5701075A (en) * 1996-01-04 1997-12-23 General Electric Company Magnetic resonance imaging shimming by superconducting gradient shield
US5786695A (en) * 1997-03-21 1998-07-28 Picker International, Inc. Shim tray with reduced heat conduction and forced cooling
US6011394A (en) * 1997-08-07 2000-01-04 Picker International, Inc. Self-shielded gradient coil assembly and method of manufacturing the same
EP1046053A1 (de) 1998-10-28 2000-10-25 Koninklijke Philips Electronics N.V. Magnetresonanzbildgebungsgerät mit einer mechanisch integrierten wirbelstromabschrimung im gradientensystem
US7598739B2 (en) * 1999-05-21 2009-10-06 Regents Of The University Of Minnesota Radio frequency gradient, shim and parallel imaging coil
EP1230559A2 (de) * 1999-05-21 2002-08-14 The General Hospital Corporation Tem resonator für die bildgebung mittels magnetischer resonanz
EP1137954A1 (de) * 1999-09-23 2001-10-04 Koninklijke Philips Electronics N.V. Gerät der bildgebenden magnetischen resonanz mit einer vakuumisolierten gradientenspule
JP3967505B2 (ja) * 1999-12-07 2007-08-29 日本電子株式会社 磁場補正コイルの設計方法
EP1305649A2 (de) * 2000-07-31 2003-05-02 Regents Of The University Of Minnesota Offene tem resonatoren für die bildgebende magnetische resonanz
US6294972B1 (en) 2000-08-03 2001-09-25 The Mcw Research Foundation, Inc. Method for shimming a static magnetic field in a local MRI coil
DE10101071C2 (de) * 2001-01-11 2002-11-14 Siemens Ag Magnetresonanzgerät mit einem Gradientenspulensystem mit Versteifungselementen
US6525536B2 (en) 2001-01-23 2003-02-25 Intermagnetics General Corporation Compact gradient coil assembly for MRI apparatus
DE10109543B4 (de) * 2001-02-28 2006-03-30 Siemens Ag Verfahren zum Betrieb eines Gradientenspulensystems eines Magnetresonanzgeräts
US6538443B2 (en) 2001-03-20 2003-03-25 Koninklijke Philips Electronics N.V. MRI gradient coil with variable field of view and apparatus and methods employing the same
US6479999B1 (en) 2001-06-05 2002-11-12 Koninklijke Philips Electronics N.V. Efficiently shielded MRI gradient coil with discretely or continuously variable field of view
US6538440B2 (en) 2001-06-20 2003-03-25 Ge Medical Systems Global Technology Co., Llc Non-conductive long wave thermal radiation shield
DE10147984B4 (de) * 2001-09-28 2007-10-11 Siemens Ag Magnetresonanz-Untersuchungsgerät mit einer Einrichtung zur Erzeugung eines homogenen Magnetfeldes und Verfahren zur Verbesserung der Homogenität eines Magnetfeldes
DE10214112B4 (de) * 2002-03-28 2006-01-26 Siemens Ag Shimkasten, Gradientenspulensystem und Magnetresonanzgerät zum Aufnehmen des Shimkastens
DE10214111B4 (de) * 2002-03-28 2007-08-16 Siemens Ag Shimkasten, Gradientenspulensystem und Magnetresonanzgerät zum Aufnehmen des Shimkastens
WO2004106960A1 (en) * 2003-05-30 2004-12-09 Koninklijke Philips Electronics N.V. Magnetic resonance imaging scanner with molded fixed shims
US6906606B2 (en) * 2003-10-10 2005-06-14 General Electric Company Magnetic materials, passive shims and magnetic resonance imaging systems
US7464558B2 (en) * 2003-11-19 2008-12-16 General Electric Company Low eddy current cryogen circuit for superconducting magnets
WO2005111645A2 (en) 2004-05-07 2005-11-24 Regents Of The University Of Minnesota Multi-current elements for magnetic resonance radio frequency coils
US7295012B1 (en) * 2006-04-28 2007-11-13 General Electric Company Methods and apparatus for MRI shim elements
GB2455720B (en) * 2007-12-18 2010-01-06 Siemens Magnet Technology Ltd Re-workable pressure vessels for superconducting magnet arrangements
RU2572646C2 (ru) * 2010-08-25 2016-01-20 Конинклейке Филипс Электроникс Н.В. Радиочастотный экран для формирования магнитно-резонансных изображений, включающий в себя проводящее покрытие в качестве экранирующего материала
CN102579047B (zh) * 2012-04-10 2014-12-03 美时医疗技术(上海)有限公司 一种婴儿专用磁共振成像装置
CN103961102A (zh) * 2014-03-11 2014-08-06 江苏美时医疗技术有限公司 一种复合型2t全身磁共振成像装置
GB2524494A (en) * 2014-03-24 2015-09-30 Siemens Plc Shimming device for a magnetic resonance imaging apparatus with enhanced cooling and method for providing such a device
WO2017079487A1 (en) 2015-11-06 2017-05-11 Cedars-Sinai Medical Center Unified coil (unic) systems and method for next generation magnetic resonance coils

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587504A (en) * 1983-11-11 1986-05-06 Oxford Magnet Technology Limited Magnet assembly for use in NMR apparatus
US4703275A (en) * 1985-07-25 1987-10-27 Picker International, Inc. Method and apparatus to compensate for eddy currents in magnetic resonance imaging
US4761612A (en) * 1985-07-25 1988-08-02 Picker International, Inc. Programmable eddy current correction
EP0365065B1 (de) * 1985-09-20 2003-03-12 Btg International Limited Magnetfeldschirme
US4737716A (en) * 1986-02-06 1988-04-12 General Electric Company Self-shielded gradient coils for nuclear magnetic resonance imaging
US4733189A (en) * 1986-06-03 1988-03-22 Massachusetts Institute Of Technology Magnetic resonance imaging systems
US4876510A (en) * 1987-06-04 1989-10-24 Siemens Aktiengesellschaft Apparatus for nuclear spin tomography having superconducting base field magnetic coils and a radiation shield
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
US4794338A (en) * 1987-11-25 1988-12-27 General Electric Company Balanced self-shielded gradient coils
US4871969A (en) * 1988-12-22 1989-10-03 General Electric Company RF shield for RF coil contained within gradient coils of NMR imaging device
US5280247A (en) * 1992-03-27 1994-01-18 Picker International, Inc. Filamentary cold shield for superconducting magnets
US5289128A (en) * 1992-03-27 1994-02-22 Picker International, Inc. Superconducting gradient shield coils
US5146197A (en) * 1990-01-25 1992-09-08 University Of Pittsburgh Self-shielding homogeneous spherical gradient coils
EP0532692B1 (de) * 1990-06-06 1996-01-17 Advanced Nmr Systems Inc. Abgeschirmte gradientspule für nmr-abbildung
US5179338A (en) * 1991-09-13 1993-01-12 General Electric Company Refrigerated superconducting MR magnet with integrated gradient coils
US5278502A (en) * 1991-09-13 1994-01-11 General Electric Company Refrigerated superconducting MR magnet with integrated cryogenic gradient coils

Also Published As

Publication number Publication date
EP0629873A1 (de) 1994-12-21
EP0629873B1 (de) 2002-01-09
US5349297A (en) 1994-09-20
DE69429595D1 (de) 2002-02-14
JPH0795974A (ja) 1995-04-11

Similar Documents

Publication Publication Date Title
DE69429595D1 (de) Selbstabgeschirmte Gradientenspule kombiniert mit Ausgleichsanordnung
DE69431047D1 (de) Halbmondförmige gradientenspulen
DE69428628T2 (de) Gradientenspule
DE69318088D1 (de) Messanordnung mit Rogowski-Spule
DE3855493T2 (de) Stabilisierte, selbstabgeschirmte Gradientespulen
DE69304999T2 (de) Rogowskispule
DE69412192T2 (de) Magnetanordnung
DE69411419D1 (de) Verbesserte NMR-Sonde mit B1-Gradientenspulen
DE69523883T2 (de) Supraleitender Magnet mit Helium-Rekondensierung
DE68911762D1 (de) Bildwiedergabeanordnung mit ausgleichsspulenbestückten Kernmitteln.
DE69225564D1 (de) Magnetische Resonanzanordnung
DE4290817T1 (de) Stellantrieb-Servo-Kompensationsverfahren
DE9413912U1 (de) Vogelkäfig
FI935060A0 (fi) Kompensaatiojärjestely
GB9306058D0 (en) Measuring gradients
DE69411617T2 (de) Element mit magnetoresistivem Effekt
DE69430107T2 (de) Magnetischer Fühler mit magnetoresistivem Effekt
FR2702845B1 (fr) Magnétomètre multiaxial à résonance.
DE69204380T2 (de) Bildwiedergabeanordnung mit Ausgleichspulen.
DE9314347U1 (de) Brennelement mit verkürztem tragenden Kühlmittelrohr
NO943994L (no) NMR kontrastmidler
KR930018551U (ko) 코받이 하중을 없앤 안경다리
BR9203269A (pt) Alto falante com bobina dupla
KR950010864U (ko) 자석이 매입된 에프알피(frp)욕조
DE9321479U1 (de) Magnetische Flüssigkeit

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS MEDICAL SYSTEMS (CLEVELAND), INC., CLEVELA

8339 Ceased/non-payment of the annual fee