JPH09215673A - 検査領域内の磁界不均一を決定するｍｒ方法及び装置 - Google Patents

検査領域内の磁界不均一を決定するｍｒ方法及び装置

Info

Publication number
JPH09215673A
JPH09215673A JP9022906A JP2290697A JPH09215673A JP H09215673 A JPH09215673 A JP H09215673A JP 9022906 A JP9022906 A JP 9022906A JP 2290697 A JP2290697 A JP 2290697A JP H09215673 A JPH09215673 A JP H09215673A
Authority
JP
Japan
Prior art keywords
magnetic field
space
gradient
echo signal
nuclear magnetization
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.)
Pending
Application number
JP9022906A
Other languages
English (en)
Japanese (ja)
Inventor
Volker Dr Rasche
ラッシュ フォルカー
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.)
Koninklijke Philips NV
Original Assignee
Philips Electronics NV
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 Philips Electronics NV filed Critical Philips Electronics NV
Publication of JPH09215673A publication Critical patent/JPH09215673A/ja
Pending 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
    • G01R33/44—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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
JP9022906A 1996-02-08 1997-02-05 検査領域内の磁界不均一を決定するｍｒ方法及び装置 Pending JPH09215673A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19604519:3 1996-02-08
DE19604519A DE19604519A1 (de) 1996-02-08 1996-02-08 MR-Verfahren zur Bestimmung der Magnetfeldinhomogenität im Untersuchungsbereich und MR-Gerät zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
JPH09215673A true JPH09215673A (ja) 1997-08-19

Family

ID=7784810

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9022906A Pending JPH09215673A (ja) 1996-02-08 1997-02-05 検査領域内の磁界不均一を決定するｍｒ方法及び装置

Country Status (4)

Country Link
US (1) US5823959A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0789251B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPH09215673A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE19604519A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812285A1 (de) * 1998-03-20 1999-09-23 Philips Patentverwaltung Bildgebendes Verfahren für medizinische Untersuchungen
DE19859489C2 (de) * 1998-12-22 2000-10-05 Siemens Ag Verfahren zur Shimmung eines Magnetsystems eines MR-Tomographiegeräts und MR-Tomographiegerät zur Durchführung des Verfahrens
DE19859491A1 (de) * 1998-12-22 2000-07-06 Siemens Ag Verfahren zur Gewinnung von MR-Bilddaten
US6275038B1 (en) * 1999-03-10 2001-08-14 Paul R. Harvey Real time magnetic field mapping using MRI
JP3668076B2 (ja) * 1999-10-18 2005-07-06 ジーイー横河メディカルシステム株式会社 Ｍｒｉ装置
DE19954925C2 (de) * 1999-11-16 2001-10-04 Bruker Medical Gmbh Verfahren zum Korrigieren von Feldinhomogenitäten höherer Ordnung in einer Apparatur der magnetischen Resonanz
EP1157281A1 (en) * 1999-12-20 2001-11-28 Koninklijke Philips Electronics N.V. Mri apparatus with flexible gradient control
DE10132274B4 (de) * 2001-07-04 2004-01-15 Siemens Ag Trennung von Fett- und Wasserbildern durch das Zwei-Punkt-Dixon-Verfahren unter Berücksichtigung einer integrierten 3D-Feld-Messung zur Aufnahme einer Karte der Grundfeldinhomogenität
DE10319037A1 (de) * 2003-04-25 2004-11-11 Eberhard-Karls-Universität Tübingen Universitätsklinikum Verfahren und Vorrichtung zur Korrektur von Bildverzerrungen bei der Magnetresonanztomografie
US7999543B2 (en) * 2005-03-23 2011-08-16 Koninklijke Philips Electronics N.V. MR method for spatially-resolved determination of relaxation parameters
DE102007033897B4 (de) * 2007-07-20 2010-02-11 Siemens Ag Verfahren zur Korrektur von Verzeichnungen in mittels eines Magnetresonanzgeräts aufgenommenen Bilddatensätzen sowie Computerprogramm zur Durchführung dieses Verfahrens
DE102007033880B4 (de) * 2007-07-20 2010-06-24 Siemens Ag Verfahren zur Korrektur von Verzeichnungen in mittels eines Magnetresonanzgeräts aufgenommenen Bilddatensätzen sowie Computerprogramm, Bildverarbeitungseinheit und Magnetresonanzgerät zur Durchführung des Verfahrens
DE102007033874B4 (de) * 2007-07-20 2010-07-01 Siemens Ag Verfahren zur Bestimmung von lokalen Abweichungen eines Grundmagnetfeldes eines Magnetresonanzgerätes von einem Soll-Wert sowie Computerprogramm, Bildverarbeitungseinheit und Magnetresonanzgerät zur Durchführung des Verfahrens
US8405395B2 (en) * 2010-04-15 2013-03-26 The General Hospital Corporation Method for simultaneous multi-slice magnetic resonance imaging
EP2610632A1 (en) 2011-12-29 2013-07-03 Koninklijke Philips Electronics N.V. MRI with Dixon-type water/fat separation and prior knowledge about inhomogeneity of the main magnetic field
US10732244B2 (en) 2012-03-26 2020-08-04 Sirona Dental Systems Gmbh Systems, methods, apparatuses, and computer-readable storage media for performing diagnostic examinations using MRI

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5838539A (ja) * 1981-08-31 1983-03-07 株式会社東芝 診断用核磁気共鳴装置
FI833807A7 (fi) * 1983-06-23 1984-12-24 Instrumentarium Oy Foerfarande foer utredning av aemnets eller magnetfaeltets egenskaper.
JPH0763455B2 (ja) * 1986-03-31 1995-07-12 株式会社東芝 磁気共鳴映像装置
US4761614A (en) * 1987-04-27 1988-08-02 Phospho-Energetics, Inc. Device and method for automatic shimming of NMR instrument
US4797615A (en) * 1987-09-30 1989-01-10 Elscint Ltd. Determining and correcting for phase jumps
US4896113A (en) * 1988-11-25 1990-01-23 General Electric Company Use of repeated gradient echoes for noise reduction and improved NMR imaging
US4987371A (en) * 1989-11-27 1991-01-22 General Electric Company Method for in-vivo shimming
US5168232A (en) * 1990-06-29 1992-12-01 General Electric Company Method for rapid magnet shimming
US5371465A (en) * 1991-03-13 1994-12-06 Hitachi, Ltd. Inspection method and apparatus using nuclear magnetic resonance (NMR)
US5307808A (en) * 1992-04-01 1994-05-03 General Electric Company Tracking system and pulse sequences to monitor the position of a device using magnetic resonance
DE69406048T2 (de) * 1993-05-24 1998-04-23 Asulab Sa Ultraschalldetektionsgerät insbesondere für eine automatisch gesteuerte Windschutzreinigungsanlage
US5587658A (en) * 1995-08-25 1996-12-24 Bruker Instruments, Inc. Shimming method for NMR magnet using unshielded gradient systems
US5539316A (en) * 1995-08-25 1996-07-23 Bruker Instruments, Inc. Shimming method for NMR magnet having large magnetic field inhomogeneities
US5617029A (en) * 1995-12-14 1997-04-01 General Electric Company Method of magnet shimming

Also Published As

Publication number Publication date
DE59704699D1 (de) 2001-10-31
EP0789251A2 (de) 1997-08-13
US5823959A (en) 1998-10-20
DE19604519A1 (de) 1997-08-14
EP0789251A3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1997-09-24
EP0789251B1 (de) 2001-09-26

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