WO1997040395A3 - Method of and device for the imaging of objects by means of magnetic resonance - Google Patents

Method of and device for the imaging of objects by means of magnetic resonance Download PDF

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Publication number
WO1997040395A3
WO1997040395A3 PCT/IB1997/000368 IB9700368W WO9740395A3 WO 1997040395 A3 WO1997040395 A3 WO 1997040395A3 IB 9700368 W IB9700368 W IB 9700368W WO 9740395 A3 WO9740395 A3 WO 9740395A3
Authority
WO
WIPO (PCT)
Prior art keywords
read gradient
gradient
artefacts
magnetic resonance
order
Prior art date
Application number
PCT/IB1997/000368
Other languages
French (fr)
Other versions
WO1997040395A2 (en
Inventor
Johannes Petrus Groen
Original Assignee
Philips Electronics Nv
Philips Norden Ab
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, Philips Norden Ab filed Critical Philips Electronics Nv
Priority to JP53787697A priority Critical patent/JP3838377B2/en
Priority to DE69734755T priority patent/DE69734755T2/en
Priority to EP97914503A priority patent/EP0835454B1/en
Publication of WO1997040395A2 publication Critical patent/WO1997040395A2/en
Publication of WO1997040395A3 publication Critical patent/WO1997040395A3/en

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
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
    • G01R33/56308—Characterization of motion or flow; Dynamic 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
    • G01R33/44—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
    • 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
    • G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
    • G01R33/56308—Characterization of motion or flow; Dynamic imaging
    • G01R33/56316—Characterization of motion or flow; Dynamic imaging involving phase contrast techniques

Abstract

A magnetic resonance method for imaging a part of a body which is arranged in a steady magnetic field, magnetic resonance signals being measured by means of different excitation pulses and different read gradients. The method can be used, for example for phase contrast angiography and for flow velocity measurements in a body of a patient. The method utilizes an initial read gradient and an alternating read gradient. In order to counteract artefacts in the image due to inhomogeneities of the steady magnetic field, the time elapsing between the initial read gradient and the alternating read gradient is varied. However, this causes artefacts in the fluid flow images due to the phase error which itself is caused by the spins flowing in the gradient field. In order to counteract these artefacts, the first-order moment of the initial read gradient is kept substantially constant until the center of the first lobe of the alternating read gradient.
PCT/IB1997/000368 1996-04-24 1997-04-08 Method of and device for the imaging of objects by means of magnetic resonance WO1997040395A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP53787697A JP3838377B2 (en) 1996-04-24 1997-04-08 Method and apparatus for imaging an object by magnetic resonance
DE69734755T DE69734755T2 (en) 1996-04-24 1997-04-08 Echoplanar imaging with echo time shift and motion compensation
EP97914503A EP0835454B1 (en) 1996-04-24 1997-04-08 Echo planar imaging involving echo time shifting and motion compensation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP96201103 1996-04-24
EP96201103.7 1996-04-24

Publications (2)

Publication Number Publication Date
WO1997040395A2 WO1997040395A2 (en) 1997-10-30
WO1997040395A3 true WO1997040395A3 (en) 1997-12-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1997/000368 WO1997040395A2 (en) 1996-04-24 1997-04-08 Method of and device for the imaging of objects by means of magnetic resonance

Country Status (5)

Country Link
US (1) US5810727A (en)
EP (1) EP0835454B1 (en)
JP (1) JP3838377B2 (en)
DE (1) DE69734755T2 (en)
WO (1) WO1997040395A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103619257A (en) * 2011-04-18 2014-03-05 皇家飞利浦有限公司 Dynamic perfusion imaging

Families Citing this family (15)

* Cited by examiner, † Cited by third party
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US5877629A (en) * 1997-04-08 1999-03-02 General Electric Company Correction for maxwell fields produced during non-rectilinear k-space sampling
US6044290A (en) * 1997-04-11 2000-03-28 Wisconsin Alumni Research Foundation Time-resolved digital subtraction magnetic resonance angiography using echo-planar imaging
US5917323A (en) * 1997-07-01 1999-06-29 General Electric Company Correction of axial image signal fall off caused by Maxwell terms
US6728568B1 (en) * 1999-05-31 2004-04-27 Hitachi Medical Corporation Magnetic resonance imaging method and device
JP3365983B2 (en) * 1999-09-28 2003-01-14 ジーイー横河メディカルシステム株式会社 MRI equipment
US6522139B1 (en) * 2000-11-14 2003-02-18 Koninklijke Philips Electronics, N.V. Calibration of timing delays using alternating/repeating waveforms and EPI
US8036730B1 (en) 2002-04-19 2011-10-11 Fonar Corporation Temporal magnetic resonance imaging
US7123008B1 (en) 2002-04-19 2006-10-17 Fonar Corporation Positional magnetic resonance imaging
JP2008523942A (en) * 2004-12-21 2008-07-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Magnetic resonance imaging with multiple contrasts
JP2007090001A (en) * 2005-09-30 2007-04-12 Ge Medical Systems Global Technology Co Llc Mr scan method and mri apparatus
US8401612B1 (en) 2006-09-11 2013-03-19 Fonar Corporation Magnetic resonance imaging system and method for detecting chiari malformations
JP5835989B2 (en) * 2010-08-11 2015-12-24 株式会社東芝 Magnetic resonance imaging apparatus and magnetic resonance imaging method
KR101582415B1 (en) * 2014-06-18 2016-01-04 가천대학교 산학협력단 Simultaneous acquisition method of T2* and angiogram in magnetic resonance imaging
EP3715896B1 (en) * 2019-03-27 2023-02-15 Siemens Healthcare GmbH Minimization of signal losses in multi-echo imaging
KR102604679B1 (en) * 2021-07-06 2023-11-23 한국과학기술원 Single-shot Pseudo-centric EPI for Magnetization-Prepared Imaging method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001201A1 (en) * 1985-08-16 1987-02-26 Picker International Inc. Low r.f. dosage magnetic resonance imaging of high velocity flows
WO1993001509A1 (en) * 1991-07-05 1993-01-21 Brigham & Women's Hospital, Inc. Ultra-fast multi-section whole body mri using gradient and spin echo (grase) imaging
US5581181A (en) * 1993-12-24 1996-12-03 U.S. Philips Corporation Grase MRI with read gradient polarity correction and T2 measurement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4707660A (en) * 1984-09-10 1987-11-17 U.S. Philips Corporation Fast method and device for determining an NMR distribution in a region of a body
US5221898A (en) * 1990-11-30 1993-06-22 Hitachi, Ltd. Flow imaging method using an MRI apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001201A1 (en) * 1985-08-16 1987-02-26 Picker International Inc. Low r.f. dosage magnetic resonance imaging of high velocity flows
WO1993001509A1 (en) * 1991-07-05 1993-01-21 Brigham & Women's Hospital, Inc. Ultra-fast multi-section whole body mri using gradient and spin echo (grase) imaging
US5581181A (en) * 1993-12-24 1996-12-03 U.S. Philips Corporation Grase MRI with read gradient polarity correction and T2 measurement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103619257A (en) * 2011-04-18 2014-03-05 皇家飞利浦有限公司 Dynamic perfusion imaging

Also Published As

Publication number Publication date
JP3838377B2 (en) 2006-10-25
EP0835454B1 (en) 2005-11-30
WO1997040395A2 (en) 1997-10-30
EP0835454A2 (en) 1998-04-15
US5810727A (en) 1998-09-22
DE69734755D1 (en) 2006-01-05
DE69734755T2 (en) 2006-08-03
JPH11508177A (en) 1999-07-21

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