IL96631A0 - Magnetic resonance imaging apparatus with artefact reduction - Google Patents

Magnetic resonance imaging apparatus with artefact reduction

Info

Publication number
IL96631A0
IL96631A0 IL96631A IL9663190A IL96631A0 IL 96631 A0 IL96631 A0 IL 96631A0 IL 96631 A IL96631 A IL 96631A IL 9663190 A IL9663190 A IL 9663190A IL 96631 A0 IL96631 A0 IL 96631A0
Authority
IL
Israel
Prior art keywords
magnetic resonance
imaging apparatus
resonance imaging
artefact reduction
artefact
Prior art date
Application number
IL96631A
Other languages
English (en)
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Publication of IL96631A0 publication Critical patent/IL96631A0/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
    • G01R33/28—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
    • G01R33/44—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
    • G01R33/56518—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to eddy currents, e.g. caused by switching of the 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
    • G01R33/44—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)
  • 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)
  • High Energy & Nuclear Physics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
IL96631A 1989-12-14 1990-12-11 Magnetic resonance imaging apparatus with artefact reduction IL96631A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8903066A NL8903066A (nl) 1989-12-14 1989-12-14 Magnetisch resonantie apparaat met beeldfout reductie.

Publications (1)

Publication Number Publication Date
IL96631A0 true IL96631A0 (en) 1991-09-16

Family

ID=19855780

Family Applications (1)

Application Number Title Priority Date Filing Date
IL96631A IL96631A0 (en) 1989-12-14 1990-12-11 Magnetic resonance imaging apparatus with artefact reduction

Country Status (6)

Country Link
US (1) US5185575A (xx)
EP (1) EP0432850A1 (xx)
JP (1) JPH04117943A (xx)
CN (1) CN1052554A (xx)
IL (1) IL96631A0 (xx)
NL (1) NL8903066A (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9002574A (nl) * 1990-11-27 1992-06-16 Philips Nv Magnetisch resonantieapparaat.
DE4422781C1 (de) * 1994-06-29 1996-02-01 Siemens Ag Aktiv geschirmte planare Gradientenspule für Polplattenmagnete
DE10337241B4 (de) * 2003-08-13 2008-05-29 Siemens Ag Verzeichnungskorrigierte Magnetresonanzmessung und Magnetresonanzgerät
WO2013135251A1 (en) 2012-03-14 2013-09-19 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e. V. A method for multi-mode, multi-load, and multi-domain optimization of a multi-channel near-field rf transmitter
US9885766B2 (en) 2012-04-17 2018-02-06 Transarray LLC Magnetic-resonance transceiver-phased array that compensates for reactive and resistive components of mutual impedance between array elements and circuit and method thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133873A1 (de) * 1981-08-27 1983-03-17 Siemens AG, 1000 Berlin und 8000 München Gradientenspulen-system fuer eine einrichtung der kernspinresonanz-technik
US4431968A (en) * 1982-04-05 1984-02-14 General Electric Company Method of three-dimensional NMR imaging using selective excitation
US4581580A (en) * 1983-12-14 1986-04-08 General Electric Company Intentionally non-orthogonal correction coils for high-homogeneity magnets
US4591789A (en) * 1983-12-23 1986-05-27 General Electric Company Method for correcting image distortion due to gradient nonuniformity
US4638253A (en) * 1984-10-29 1987-01-20 General Electric Company Mutual inductance NMR RF coil matching device
NL8502273A (nl) * 1985-08-19 1987-03-16 Philips Nv Magnetisch resonantie apparaat met bird cage r.f. spoel.
FR2597977B1 (fr) * 1986-04-24 1990-09-21 Commissariat Energie Atomique Systeme de bobines pour la production de gradients de champs magnetiques de polarisation tres uniformes dans une installation d'imagerie ou de spectroscopie par rmn
US4733189A (en) * 1986-06-03 1988-03-22 Massachusetts Institute Of Technology Magnetic resonance imaging systems
NL8701948A (nl) * 1987-08-19 1989-03-16 Philips Nv Magnetisch resonantie-apparaat met verbeterd gradient spoelenstelsel.
US5122747A (en) * 1990-11-21 1992-06-16 Mayo Foundation For Medical Education And Research Spiral three-dimensional fourier transform NMR scan

Also Published As

Publication number Publication date
EP0432850A1 (en) 1991-06-19
NL8903066A (nl) 1991-07-01
JPH04117943A (ja) 1992-04-17
US5185575A (en) 1993-02-09
CN1052554A (zh) 1991-06-26

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