ATE145730T1 - Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten, schnellen änderungen im ''statischen'' magnetfeld während einer einzelnen bilderzeugungs-sequenz der magnetischen resonanz - Google Patents

Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten, schnellen änderungen im ''statischen'' magnetfeld während einer einzelnen bilderzeugungs-sequenz der magnetischen resonanz

Info

Publication number
ATE145730T1
ATE145730T1 AT90300576T AT90300576T ATE145730T1 AT E145730 T1 ATE145730 T1 AT E145730T1 AT 90300576 T AT90300576 T AT 90300576T AT 90300576 T AT90300576 T AT 90300576T AT E145730 T1 ATE145730 T1 AT E145730T1
Authority
AT
Austria
Prior art keywords
magnetic resonance
imaging
static
fake
field during
Prior art date
Application number
AT90300576T
Other languages
German (de)
English (en)
Inventor
Leon Kaufman
Lawrence E Crooks
James D Hale
David M Kramer
Kristen Hake
Hector Avram
Joel Wummer
Original Assignee
Univ California
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 Univ California filed Critical Univ California
Application granted granted Critical
Publication of ATE145730T1 publication Critical patent/ATE145730T1/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
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
    • G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency
    • 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
    • G01R33/56563—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of the main magnetic field B0, e.g. temporal variation of the magnitude or spatial inhomogeneity of B0

Landscapes

  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
AT90300576T 1989-04-05 1990-01-19 Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten, schnellen änderungen im ''statischen'' magnetfeld während einer einzelnen bilderzeugungs-sequenz der magnetischen resonanz ATE145730T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33368189A 1989-04-05 1989-04-05
US07/363,187 US4970457A (en) 1989-04-05 1989-06-08 MRI compensated for spurious rapid variations in static magnetic field during a single MRI sequence

Publications (1)

Publication Number Publication Date
ATE145730T1 true ATE145730T1 (de) 1996-12-15

Family

ID=26988849

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90300576T ATE145730T1 (de) 1989-04-05 1990-01-19 Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten, schnellen änderungen im ''statischen'' magnetfeld während einer einzelnen bilderzeugungs-sequenz der magnetischen resonanz

Country Status (5)

Country Link
US (1) US4970457A (en, 2012)
EP (1) EP0391515B1 (en, 2012)
JP (1) JPH0484937A (en, 2012)
AT (1) ATE145730T1 (en, 2012)
DE (1) DE69029216D1 (en, 2012)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8819705D0 (en) * 1988-08-19 1988-09-21 Royal Marsden Hospital Improvements in nmr spectroscopy localisation
US5239266A (en) * 1990-08-03 1993-08-24 The Regents Of The University Of California MRI using variable imaging parameter(s) within a single image sequence
US5245286A (en) * 1991-04-18 1993-09-14 The Regents Of The University Of California Apparatus and method for stabilizing the background magnetic field during mri
AU655079B2 (en) * 1991-10-25 1994-12-01 University Of Queensland, The Compensation of pulsed linear magnet field gradient inducted eddy currents in NMR systems
EP0538668B1 (en) * 1991-10-25 1996-06-26 The University Of Queensland Correction of signal distortion in an NMR apparatus
US5227728A (en) * 1991-11-01 1993-07-13 The Regents Of The University Of California Gradient driver control in magnetic resonance imaging
US5442290A (en) * 1992-08-04 1995-08-15 The Regents Of The University Of California MRI gradient drive current control using all digital controller
DE4316642A1 (de) * 1993-05-18 1994-11-24 Siemens Ag Abschirmkammer mit einer nicht störenden und störunempfindlichen Monitor-Anzeigevorrichtung
JP3472620B2 (ja) * 1994-06-28 2003-12-02 ジーイー横河メディカルシステム株式会社 Ｍｒｉ装置
DE4445782C1 (de) * 1994-12-21 1996-07-25 Siemens Ag Verfahren zur Phasenkorrektur von Kernresonanzsignalen
US5537039A (en) * 1995-10-10 1996-07-16 General Electric Company Virtual frequency encoding of acquired NMR image data
US5652514A (en) * 1996-03-25 1997-07-29 Toshiba America Mri, Inc. Correction for field variation in steady-state MRI by repeated acquisition of zero k-space line
DE19702831A1 (de) * 1997-01-27 1998-03-12 Siemens Ag Vorrichtung zur Kompensation von externen Feldstörungen des Grundmagnetfeldes bei Kernspintomographen
US5891032A (en) * 1997-04-10 1999-04-06 Elscint Ltd Fat free TOF angiography
DE19715113C2 (de) * 1997-04-11 1999-01-28 Siemens Ag Verfahren zur Phasenkorrektur von Kernresonanzsignalen
US6114853A (en) * 1997-06-25 2000-09-05 Toshiba America Mri, Inc. NMR methods for qualification of sequence-induced B0 oscillation and correction of the resultant image artifacts in MRI
US6294913B1 (en) * 1999-11-22 2001-09-25 Ge Medical Systems Global Technology Company Llc Compensation of variations in polarizing magnetic field during magnetic resonance imaging
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
JP3513076B2 (ja) * 2000-04-07 2004-03-31 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 Ｍｒｉ装置
US6795723B1 (en) * 2000-05-22 2004-09-21 Koninklijke Philips Electronics, N.V. Interleaved phase encoding acquisition for MRI with controllable artifact suppression and flexible imaging parameter selection
DE10036207B4 (de) * 2000-07-25 2006-11-30 Siemens Ag Verfahren zum Durchführen einer Perfusionsmessung mittels Magnetresonanzbildgebung
JP2002159463A (ja) * 2000-11-15 2002-06-04 Ge Medical Systems Global Technology Co Llc Ｍｒｉ装置の磁界変動測定方法、磁界変動補償方法およびｍｒｉ装置
US6472872B1 (en) 2001-06-29 2002-10-29 Mayo Foundation For Medical Education And Research Real-time shimming of polarizing field in magnetic resonance system
US6933720B2 (en) * 2001-12-11 2005-08-23 Toshiba America Mri, Inc. Sequence preconditioning for ultra-fast magnetic resonance imaging
US6956374B2 (en) * 2003-07-02 2005-10-18 General Electric Company Method and apparatus to reduce RF power in high field MR imaging incorporating multi-phase RF pulse flip angles
EP1664821B1 (en) * 2003-09-16 2007-12-12 Koninklijke Philips Electronics N.V. A method of monitoring a magnetic field drift of a magnetic resonance imaging apparatus
US6995559B2 (en) * 2003-10-30 2006-02-07 Ge Medical Systems Global Technology Company, Llc Method and system for optimized pre-saturation in MR with corrected transmitter frequency of pre-pulses
DE102006005285A1 (de) 2006-02-06 2007-08-16 Siemens Ag Magnetresonanzeinrichtung sowie Verfahren zur Überwachung einer Magnetresonanzeinrichtung
US7471086B2 (en) * 2007-04-20 2008-12-30 General Electric Company Magnetic resonance imaging visualization method and system
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
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
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
EP3077836B1 (en) * 2013-12-02 2022-05-25 Koninklijke Philips N.V. Magnetic resonance imaging using zero echo time pulse sequences
DE102015209838B4 (de) * 2015-05-28 2017-04-13 Siemens Healthcare Gmbh Verfahren zu einer Korrektur von Magnetresonanz-Messdaten
US20230297646A1 (en) * 2022-03-18 2023-09-21 Change Healthcare Holdings, Llc System and methods for classifying magnetic resonance imaging (mri) image characteristics

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495162A (en) * 1967-05-19 1970-02-10 Varian Associates Pulsed gyromagnetic resonance spectrometer employing an internal control sample and automatic homogeneity control
US3496454A (en) * 1967-05-19 1970-02-17 Varian Associates Frequency tracking magnetic field regulator employing means for abruptly shifting the regulated field intensity
GB1584950A (en) * 1978-05-25 1981-02-18 Emi Ltd Imaging systems
US4685468A (en) * 1983-03-18 1987-08-11 Albert Macovski NMR imaging system using field compensation
JPS60222044A (ja) * 1984-04-20 1985-11-06 横河電機株式会社 核磁気共鳴による診断方法および装置
JPS60222043A (ja) * 1984-04-20 1985-11-06 横河電機株式会社 核磁気共鳴による診断装置
JPS63109849A (ja) * 1986-10-29 1988-05-14 株式会社日立メディコ Ｎｍｒイメ−ジング装置
US4885542A (en) * 1988-04-14 1989-12-05 The Regents Of The University Of California MRI compensated for spurious NMR frequency/phase shifts caused by spurious changes in magnetic fields during NMR data measurement processes
US4885549A (en) * 1988-11-30 1989-12-05 General Electric Company Method of phase and amplitude correction of NMR signals using a reference marker

Also Published As

Publication number Publication date
JPH0576851B2 (en, 2012) 1993-10-25
EP0391515A2 (en) 1990-10-10
DE69029216D1 (de) 1997-01-09
EP0391515A3 (en) 1991-05-02
US4970457A (en) 1990-11-13
JPH0484937A (ja) 1992-03-18
EP0391515B1 (en) 1996-11-27

Similar Documents

Publication Publication Date Title
ATE145730T1 (de) Bilderzeugung mittels magnetischer resonanz mit kompensation der unechten, schnellen änderungen im ''statischen'' magnetfeld während einer einzelnen bilderzeugungs-sequenz der magnetischen resonanz
DE3673860D1 (de) Lokale sonde zur anwendung bei der bilderzeugung mittels magnetischer kernresonanz.
DE3853356D1 (de) Magnetische Kernresonanz(NMR)-Bildgebung mit mehreren Oberflächenspulen.
DE3851442D1 (de) Verbesserungen bei der Bilderzeugung mittels magnetischer Resonanz.
EP0206057A3 (en) Supple head for nuclear magnetic resonance (nmr) measurements, especially for nmr tomography
DE69028379D1 (de) System zur Bilderzeugung mittels magnetischer Resonanz mit aktiv abgeschirmten Gradientenspulen
ATE39575T1 (de) Wirbelfeldunterdrueckungseinrichtung fuer eine magnetische kernresonanzapparatur.
IL80813A (en) Self-shielded gradient coils for nuclear magnetic resonance imaging
EP0289360A3 (en) Rf frequency adjustment for magnetic resonance scanner
FI904062A7 (fi) Virtauskompensoitu nopea NMR (ydinmagneettinen resonannsi) pulssisekvenssi
DE69226477D1 (de) Magnet mit offenem Zutritt zur Bilderzeugung mittels magnetischer Resonanz
DE3773938D1 (de) Eichkoerper eines mit kernmagnetischer resonanz arbeitenden geraets und verfahren zur messung der charakteristiken eines magnetfeldes unter verwendung dieses eichkoerpers.
DE69229008D1 (de) Bilderzeugung mittels magnetischer Resonanz von Untersuchungsarten mit kurzer T2 mit verbessertem Kontrast
DE69329873D1 (de) Kompensierung von Wirbelströmen in der Bilderzeugung mittels magnetischer Resonanz
DE19580154T1 (de) Magnetresonanz (MRI)-Abbildungssystem mit zeitlich veränderlichem Gradienten während der Signalerfassung
DE68927349D1 (de) Messungen der magnetischen resonanz
DE3862444D1 (de) Lokalspule fuer die untersuchung eines objektes mit hilfe der kernmagnetischen resonanz.
EP0150938A3 (en) Nuclear magnetic resonance apparatus
DE69129362D1 (de) Bilderzeugung mittels magnetischer Resonanz
DE3874951D1 (de) Empfangsantenne mit passiver entkopplung, insbesondere fuer einen bilderzeugungs-apparat mittels magnetischer kernresonanz.
NO914170L (no) Fremgangsmaate for avbildning ved magnetisk resonans
GB8702951D0 (en) Nmr imaging
DE68927049D1 (de) Bildformungsanordnung mittels magnetischer resonanz
EP0204569A3 (en) Non-harmonic nmr spin echo imaging
FR2626377B1 (fr) Oscillateur nucleaire comprenant une sonde a resonance magnetique nucleaire

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties