IN2014CN05013A - - Google Patents

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Publication number
IN2014CN05013A
IN2014CN05013A IN5013CHN2014A IN2014CN05013A IN 2014CN05013 A IN2014CN05013 A IN 2014CN05013A IN 5013CHN2014 A IN5013CHN2014 A IN 5013CHN2014A IN 2014CN05013 A IN2014CN05013 A IN 2014CN05013A
Authority
IN
India
Prior art keywords
gradient echo
gradient
magnetic field
image
echo signals
Prior art date
Application number
Inventor
Holger Eggers
Peter Börnert
Original Assignee
Koninkl 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 Koninkl Philips Nv filed Critical Koninkl Philips Nv
Publication of IN2014CN05013A publication Critical patent/IN2014CN05013A/en

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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
    • 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
    • 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
    • G01R33/4828—Resolving the MR signals of different chemical species, e.g. water-fat imaging
    • 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
    • G01R33/44—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
    • G01R33/56509—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to motion, displacement or flow, e.g. gradient moment nulling
    • 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
    • G01R33/56527—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to chemical shift effects
    • 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]
    • G01R33/5616—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 gradient refocusing, e.g. EPI

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (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)

Abstract

The invention relates to a method of MR imaging of a body (10) placed in the examination volume of a MR device (1). It is an object of the invention to provide a method that enables efficient compensation of flow artefacts especially for contrast enhanced MR angiography in combination with Dixon water/fat separation. The method of the invention comprises the steps of: a) generating at least two gradient echo signals at two different echo times by subjecting the portion of the body (10) to an imaging sequence of RF pulses and switched magnetic field gradients wherein the 0th moment of the readout magnetic field gradient essentially vanishes at the time of the first gradient echo the 1st moment of the readout gradient being non zero at the time of the first gradient echo while both the 0th and 1st moments of the readout magnetic field gradient essentially vanish at the time of the second gradient echo; b) acquiring the gradient echo signals; c) repeating steps a) and b) for a plurality of phase encoding steps. Moreover the invention relates to a MR device for carrying out the method of the invention and to a computer program to be run on a MR device; d) reconstructing a first MR image from the gradient echo signals of the first gradient echo and a second MR image from the gradient echo signals of the second gradient echo; and e) identifying ghosting artefacts in the first and/or second MR image by comparing the first and second MR images.
IN5013CHN2014 2011-12-23 2012-11-26 IN2014CN05013A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161579725P 2011-12-23 2011-12-23
PCT/IB2012/056748 WO2013093674A1 (en) 2011-12-23 2012-11-26 Mr imaging with suppression of flow artefacts

Publications (1)

Publication Number Publication Date
IN2014CN05013A true IN2014CN05013A (en) 2015-09-18

Family

ID=47522749

Family Applications (1)

Application Number Title Priority Date Filing Date
IN5013CHN2014 IN2014CN05013A (en) 2011-12-23 2012-11-26

Country Status (8)

Country Link
US (1) US9746539B2 (en)
EP (1) EP2798364B1 (en)
JP (1) JP6046742B2 (en)
CN (1) CN104067137B (en)
BR (1) BR112014015398A8 (en)
IN (1) IN2014CN05013A (en)
RU (1) RU2605524C2 (en)
WO (1) WO2013093674A1 (en)

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CN104459587B (en) * 2013-09-17 2018-02-09 北京万东医疗科技股份有限公司 A kind of flowing compensation method for MRI system
WO2016046062A1 (en) * 2014-09-26 2016-03-31 Koninklijke Philips N.V. Dixon mr imaging with suppression of flow artifacts
CN107923958B (en) * 2015-06-26 2020-06-23 皇家飞利浦有限公司 Phase corrected dixon magnetic resonance imaging
US9727953B2 (en) * 2015-06-30 2017-08-08 General Electric Company Method and apparatus for ring artifact repair of magnetic resonance images
EP3465246A1 (en) 2016-06-02 2019-04-10 Koninklijke Philips N.V. Dixon-type water/fat separation mr imaging
DE102016212632A1 (en) * 2016-07-12 2018-01-18 Siemens Healthcare Gmbh Reduction of artifacts in magnetic resonance technology
EP3413070A1 (en) * 2017-06-09 2018-12-12 Koninklijke Philips N.V. Dual-echo dixon-type water/fat separation mr imaging
CN109222974A (en) * 2018-11-30 2019-01-18 济南市儿童医院（山东大学齐鲁儿童医院） MR imaging method with flow artifact suppression
CN112578325B (en) * 2019-09-27 2022-07-05 上海联影医疗科技股份有限公司 Magnetic resonance imaging method, magnetic resonance imaging apparatus, computer device, and storage medium
EP3859366A1 (en) 2020-01-30 2021-08-04 Koninklijke Philips N.V. Mr imaging using dixon-type water/fat separation with suppression of flow-induced leakage and/or swapping artifacts
CN113805130B (en) * 2020-06-17 2024-01-30 西门子(深圳)磁共振有限公司 Quick susceptibility sensitive imaging method, device and magnetic resonance imaging system
DE102020212173A1 (en) * 2020-09-28 2022-03-31 Siemens Healthcare Gmbh Method for acquiring reference data for phase correction in magnetic resonance technology
EP4145165A1 (en) * 2021-09-03 2023-03-08 Siemens Healthcare GmbH Control of a magnetic resonance device with compensated maxwell phase

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JP3785128B2 (en) * 2002-09-19 2006-06-14 株式会社東芝 Image diagnostic apparatus, image processing method, image processing apparatus, and storage medium
JP5619339B2 (en) * 2006-09-13 2014-11-05 株式会社東芝 Magnetic resonance imaging system
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Also Published As

Publication number Publication date
JP6046742B2 (en) 2016-12-21
CN104067137A (en) 2014-09-24
RU2605524C2 (en) 2016-12-20
WO2013093674A1 (en) 2013-06-27
BR112014015398A8 (en) 2017-07-04
EP2798364B1 (en) 2021-08-11
BR112014015398A2 (en) 2017-06-13
JP2015504714A (en) 2015-02-16
CN104067137B (en) 2017-12-12
US9746539B2 (en) 2017-08-29
EP2798364A1 (en) 2014-11-05
RU2014125528A (en) 2016-02-20
US20140368195A1 (en) 2014-12-18

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