FI113300B - Menetelmä ja laite NMR-testaukseen - Google Patents

Menetelmä ja laite NMR-testaukseen Download PDF

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Publication number
FI113300B
FI113300B FI950732A FI950732A FI113300B FI 113300 B FI113300 B FI 113300B FI 950732 A FI950732 A FI 950732A FI 950732 A FI950732 A FI 950732A FI 113300 B FI113300 B FI 113300B
Authority
FI
Finland
Prior art keywords
gradient
pulse
interval
time
intervals
Prior art date
Application number
FI950732A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI950732A0 (fi
FI950732A (fi
Inventor
Christopher John Robe Counsell
Original Assignee
British Tech Group
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 British Tech Group filed Critical British Tech Group
Publication of FI950732A0 publication Critical patent/FI950732A0/fi
Publication of FI950732A publication Critical patent/FI950732A/fi
Application granted granted Critical
Publication of FI113300B publication Critical patent/FI113300B/fi

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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
    • G01R33/561—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]
    • 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

Landscapes

  • 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)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
FI950732A 1992-08-20 1995-02-17 Menetelmä ja laite NMR-testaukseen FI113300B (fi)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB929217718A GB9217718D0 (en) 1992-08-20 1992-08-20 Method of and apparatus for nmr testing
GB9217718 1992-08-20
GB9301702 1993-01-28
PCT/GB1993/001702 WO1994004937A1 (fr) 1992-08-20 1993-08-11 Procede et dispositif d'analyse par resonance magnetique nucleaire

Publications (3)

Publication Number Publication Date
FI950732A0 FI950732A0 (fi) 1995-02-17
FI950732A FI950732A (fi) 1995-02-17
FI113300B true FI113300B (fi) 2004-03-31

Family

ID=10720675

Family Applications (1)

Application Number Title Priority Date Filing Date
FI950732A FI113300B (fi) 1992-08-20 1995-02-17 Menetelmä ja laite NMR-testaukseen

Country Status (8)

Country Link
US (1) US5369362A (fr)
EP (1) EP0656124B1 (fr)
JP (1) JP3490439B2 (fr)
DE (1) DE69317427T2 (fr)
FI (1) FI113300B (fr)
GB (2) GB9217718D0 (fr)
IL (1) IL106685A (fr)
WO (1) WO1994004937A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9315876D0 (en) * 1993-07-30 1993-09-15 British Tech Group Improvements in or relating to nuclear magnetic resonance (nmr) imaging
US5561369A (en) * 1994-07-29 1996-10-01 Feinberg; David A. Variation of number and duration of gradient read times during a single pulse sequence for proton density and T2 -weighted images
DE19649699C2 (de) * 1996-11-29 2003-01-30 Siemens Ag Pulssequenz für ein diagnostisches Magnetresonanzgerät
US11835611B2 (en) * 2017-04-06 2023-12-05 The United States Of America, As Represented By The Secretary, Department Of Health And Human Services Isotropic generalized diffusion tensor MRI
CN115951281B (zh) * 2022-12-08 2023-10-20 无锡鸣石峻致医疗科技有限公司 磁共振梯度延迟和梯度切换率同时检测方法、装置和介质

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182873A1 (fr) * 1984-06-01 1986-06-04 Advanced Nmr Systems Inc. Prise d'image de fourier nmr a partir d'echos multiples
US4695800A (en) * 1985-06-06 1987-09-22 Technicare Corporation Non harmonic NMR spin echo imaging
US4684891A (en) * 1985-07-31 1987-08-04 The Regents Of The University Of California Rapid magnetic resonance imaging using multiple phase encoded spin echoes in each of plural measurement cycles
US4703268A (en) * 1986-03-03 1987-10-27 Picker International, Ltd. Clean multiple echo magnetic resonance imaging using asymmetric sequences
NL8600712A (nl) * 1986-03-20 1987-10-16 Philips Nv Magnetische resonatiewerkwijze en inrichting ter bepaling van het hoogfrequent vermogen van een hoogfrequent elektromagnetische alfa-puls.
JPS62231647A (ja) * 1986-03-31 1987-10-12 株式会社東芝 磁気共鳴映像装置
US4884029A (en) * 1986-08-15 1989-11-28 Picker International, Inc. Quick imaging scheme utilizing differently phase encoded primary and stimulated echoes
US4789832A (en) * 1987-01-14 1988-12-06 Jeol Ltd. Three-dimensional NMR spectroscopy
DE3804924A1 (de) * 1988-02-17 1989-08-31 Philips Patentverwaltung Verfahren zur ermittlung der spektralen verteilung der kernmagnetisierung in einem begrenzten volumenbereich und anordnung zur durchfuehrung des verfahrens
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
JPH02159252A (ja) * 1988-12-14 1990-06-19 Hitachi Ltd 磁気共鳴イメージング装置における画像再構成方法
US4983921A (en) * 1989-08-18 1991-01-08 The Regents Of The University Of California Rapid calibration of nutation angles in MRI
DE4005675C2 (de) * 1990-02-22 1995-06-29 Siemens Ag Verfahren zur Unterdrückung von Artefakten bei der Bilderzeugung mittels kernmagnetischer Resonanz
US5151656A (en) * 1990-12-11 1992-09-29 General Electric Company Correction of nmr data acquired by an echo-planar technique
US5168229A (en) * 1991-04-02 1992-12-01 General Electric Company Multidimensional nmr spectroscopy using switched acquisition time gradients for multiple coherence transfer pathway detection
DE59300388D1 (de) * 1992-03-12 1995-08-31 Siemens Ag Pulssequenz für ein Kernspinresonanzgerät.

Also Published As

Publication number Publication date
EP0656124A1 (fr) 1995-06-07
JPH08500496A (ja) 1996-01-23
DE69317427D1 (de) 1998-04-16
IL106685A0 (en) 1993-12-08
GB9217718D0 (en) 1992-09-30
GB9317390D0 (en) 1993-10-06
DE69317427T2 (de) 1998-07-02
GB2270763B (en) 1996-06-05
JP3490439B2 (ja) 2004-01-26
US5369362A (en) 1994-11-29
WO1994004937A1 (fr) 1994-03-03
IL106685A (en) 1995-12-08
GB2270763A (en) 1994-03-23
FI950732A0 (fi) 1995-02-17
EP0656124B1 (fr) 1998-03-11
FI950732A (fi) 1995-02-17

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