IL68344A - Method to eliminate the effects of magnetic field inhomogeneities in nmr imaging - Google Patents

Method to eliminate the effects of magnetic field inhomogeneities in nmr imaging

Info

Publication number
IL68344A
IL68344A IL68344A IL6834483A IL68344A IL 68344 A IL68344 A IL 68344A IL 68344 A IL68344 A IL 68344A IL 6834483 A IL6834483 A IL 6834483A IL 68344 A IL68344 A IL 68344A
Authority
IL
Israel
Prior art keywords
eliminate
effects
magnetic field
nmr imaging
field inhomogeneities
Prior art date
Application number
IL68344A
Other languages
English (en)
Other versions
IL68344A0 (en
Original Assignee
Yeda Res & Dev
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 Yeda Res & Dev filed Critical Yeda Res & Dev
Priority to IL68344A priority Critical patent/IL68344A/xx
Publication of IL68344A0 publication Critical patent/IL68344A0/xx
Priority to US06/598,237 priority patent/US4656425A/en
Priority to JP59072592A priority patent/JPS6046447A/ja
Priority to EP84103985A priority patent/EP0123200A3/en
Publication of IL68344A publication Critical patent/IL68344A/xx

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
    • G01R33/4818—MR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g. centric or segmented coverage of k-space
    • G01R33/482—MR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g. centric or segmented coverage of k-space using a Cartesian trajectory
    • 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
    • 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
    • G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
    • G01R33/5615—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE]
    • G01R33/5617—Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE] using RF refocusing, e.g. RARE

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)
IL68344A 1983-04-10 1983-04-10 Method to eliminate the effects of magnetic field inhomogeneities in nmr imaging IL68344A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
IL68344A IL68344A (en) 1983-04-10 1983-04-10 Method to eliminate the effects of magnetic field inhomogeneities in nmr imaging
US06/598,237 US4656425A (en) 1983-04-10 1984-04-09 Method to eliminate the effects of magnetic field inhomogeneities in NMR imaging and apparatus therefor
JP59072592A JPS6046447A (ja) 1983-04-10 1984-04-10 核磁気共鳴画像形成方法およびそれに用いる画像形成装置
EP84103985A EP0123200A3 (en) 1983-04-10 1984-04-10 Method to eliminate the effects of magnetic field inhomogeneities in nmr imaging

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL68344A IL68344A (en) 1983-04-10 1983-04-10 Method to eliminate the effects of magnetic field inhomogeneities in nmr imaging

Publications (2)

Publication Number Publication Date
IL68344A0 IL68344A0 (en) 1983-07-31
IL68344A true IL68344A (en) 1988-10-31

Family

ID=11054178

Family Applications (1)

Application Number Title Priority Date Filing Date
IL68344A IL68344A (en) 1983-04-10 1983-04-10 Method to eliminate the effects of magnetic field inhomogeneities in nmr imaging

Country Status (4)

Country Link
US (1) US4656425A (ja)
EP (1) EP0123200A3 (ja)
JP (1) JPS6046447A (ja)
IL (1) IL68344A (ja)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8415078D0 (en) * 1984-06-13 1984-07-18 Picker Int Ltd Nuclear magnetic resonance imaging
FR2574551B1 (fr) * 1984-12-12 1986-12-26 Commissariat Energie Atomique Procede de generation et de traitement de signaux pour l'obtention par resonance magnetique nucleaire d'une image exempte de distorsions a partir d'un champ de polarisation inhomogene
US5055787A (en) * 1986-08-27 1991-10-08 Schlumberger Technology Corporation Borehole measurement of NMR characteristics of earth formations
DE4213050C2 (de) * 1992-04-21 1994-03-03 Siemens Ag Verfahren zur Kompensation von Magnetfeldinhomogenitäten erster Ordnung bei Kernspintomographiegeräten
US5345178A (en) * 1992-04-21 1994-09-06 Siemens Aktiengesellschaft Method for setting the current through shim coils and gradient coils in a nuclear magnetic resonance apparatus
US5317265A (en) * 1992-09-16 1994-05-31 Weinstock Ronald J Computerized magnetic resonance analyzer
US5592086A (en) * 1992-09-16 1997-01-07 Weinstock; Ronald J. Automated computerized magnetic resonance detector and analyzer
US5304930A (en) * 1993-02-01 1994-04-19 Panacea Medical Laboratories Remotely positioned MRI system
US5517118A (en) * 1994-04-25 1996-05-14 Panacea Medical Laboratories Subslicing for remotely positioned MRI
US5767675A (en) * 1996-05-31 1998-06-16 Panacea Medical Laboratories Mixed timing CPMG sequence for remotely positioned MRI
US5935065A (en) * 1997-06-27 1999-08-10 Panacea Medical Laboratories MRI system with peripheral access and inhomogeneous field
US5999838A (en) * 1997-07-24 1999-12-07 Panacea Medical Laboratories Spread spectrum MRI
GB2357149A (en) 1999-12-08 2001-06-13 Topspin Medical MRI using non-homogeneous static field
US6489767B1 (en) 2000-09-06 2002-12-03 Quantum Magnetics, Inc. Apparatus for and method of single-sided magnetic resonance imaging with palm-size probe
US6704594B1 (en) 2000-11-06 2004-03-09 Topspin Medical (Israel) Limited Magnetic resonance imaging device
US6650730B2 (en) 2001-01-23 2003-11-18 Fartech, Inc. Filter assembly for X-ray filter system for medical imaging contrast enhancement
US6614878B2 (en) 2001-01-23 2003-09-02 Fartech, Inc. X-ray filter system for medical imaging contrast enhancement
GB2404026B (en) 2003-07-14 2005-09-21 Rolls Royce Plc Method for filtering spurious resonances from an NMR dataset
US7309986B2 (en) * 2005-03-21 2007-12-18 The Trustees Of The University Of Pennsylvania Methods and apparatus for magnetic resonance imaging in inhomogeneous fields
WO2007061438A2 (en) * 2005-11-16 2007-05-31 The Trustees Of The University Of Pennsylvania Slant-slice imaging with inhomogeneous fields
DE102006033248B4 (de) 2006-07-18 2009-10-22 Siemens Ag Verfahren zur Transformation eines verzeichnungskorrigierten Magnetresonanzbilds, Verfahren zur Durchführung von Magnetresonanzmessungen und Bildtransformationseinheit
EP2177925A1 (en) * 2008-10-16 2010-04-21 RWTH Aachen Magnetic resonance method using a phase-modulated pulse train with a constant small flip angle
US9423480B2 (en) * 2008-10-27 2016-08-23 The University Of Western Ontario System and method for magnetic resonance imaging

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789832A (en) * 1972-03-17 1974-02-05 R Damadian Apparatus and method for detecting cancer in tissue
GB1596160A (en) * 1976-12-15 1981-08-19 Nat Res Dev Nuclear magnetic resonance apparatus and methods
US4297637A (en) * 1978-07-20 1981-10-27 The Regents Of The University Of California Method and apparatus for mapping lines of nuclear density within an object using nuclear magnetic resonance
GB2052753B (en) * 1979-05-23 1983-08-03 Emi Ltd Nmr system
WO1981002788A1 (en) * 1980-03-14 1981-10-01 Nat Res Dev Methods of producing image information from objects
DE3135335A1 (de) * 1981-09-07 1983-08-18 Siemens AG, 1000 Berlin und 8000 München Kernspin-tomographie-verfahren
GB2105853B (en) * 1981-09-09 1985-08-21 Nat Res Dev Spatially selective nmr
US4471306A (en) * 1982-02-03 1984-09-11 General Electric Company Method of NMR imaging which overcomes T2 * effects in an inhomogeneous static magnetic field

Also Published As

Publication number Publication date
US4656425A (en) 1987-04-07
IL68344A0 (en) 1983-07-31
EP0123200A3 (en) 1985-11-06
JPS6046447A (ja) 1985-03-13
EP0123200A2 (en) 1984-10-31

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