IL68901A - Method of eliminating effects of spurious free induction decay nmr signal caused by imperfect 180grad rf pulses - Google Patents

Method of eliminating effects of spurious free induction decay nmr signal caused by imperfect 180grad rf pulses

Info

Publication number
IL68901A
IL68901A IL68901A IL6890183A IL68901A IL 68901 A IL68901 A IL 68901A IL 68901 A IL68901 A IL 68901A IL 6890183 A IL6890183 A IL 6890183A IL 68901 A IL68901 A IL 68901A
Authority
IL
Israel
Prior art keywords
180grad
imperfect
pulses
signal caused
nmr signal
Prior art date
Application number
IL68901A
Other languages
English (en)
Other versions
IL68901A0 (en
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Publication of IL68901A0 publication Critical patent/IL68901A0/xx
Publication of IL68901A publication Critical patent/IL68901A/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
    • G01R33/54—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

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)
IL68901A 1982-07-01 1983-06-07 Method of eliminating effects of spurious free induction decay nmr signal caused by imperfect 180grad rf pulses IL68901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/394,355 US4484138A (en) 1982-07-01 1982-07-01 Method of eliminating effects of spurious free induction decay NMR signal caused by imperfect 180 degrees RF pulses

Publications (2)

Publication Number Publication Date
IL68901A0 IL68901A0 (en) 1983-10-31
IL68901A true IL68901A (en) 1987-11-30

Family

ID=23558606

Family Applications (1)

Application Number Title Priority Date Filing Date
IL68901A IL68901A (en) 1982-07-01 1983-06-07 Method of eliminating effects of spurious free induction decay nmr signal caused by imperfect 180grad rf pulses

Country Status (6)

Country Link
US (1) US4484138A (fi)
EP (1) EP0098426B1 (fi)
JP (1) JPS5967450A (fi)
DE (1) DE3381860D1 (fi)
FI (1) FI78986C (fi)
IL (1) IL68901A (fi)

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US4607223A (en) * 1982-08-13 1986-08-19 National Research Development Corporation Nuclear magnetic resonance imaging method
US4521733A (en) * 1983-05-23 1985-06-04 General Electric Company NMR Imaging of the transverse relaxation time using multiple spin echo sequences
US4549140A (en) * 1983-06-03 1985-10-22 General Electric Company Method utilizing combined, interleaved pulse sequences for reducing motion artifacts in computed T1,T2 and M0 NMR imaging
US4549139A (en) * 1983-06-03 1985-10-22 General Electric Company Method of accurate and rapid NMR imaging of computed T1 and spin density
GB8316759D0 (en) * 1983-06-20 1983-07-20 Picker Int Ltd Nuclear magnetic resonance
US4602641A (en) * 1983-08-15 1986-07-29 The Regents Of The University Of California Method and apparatus for NMR detection and imaging of flowing fluid nuclei
US4532474A (en) * 1983-09-09 1985-07-30 General Electric Company Nuclear magnetic resonance imaging using pulse sequences combining selective excitation and driven free precession
USRE33279E (en) * 1983-10-07 1990-07-31 General Electric Company Method for rapid acquisition of NMR data
US4587489A (en) * 1983-10-07 1986-05-06 General Electric Company Method for rapid acquisition of NMR data
GB2148013B (en) * 1983-10-12 1988-02-03 Yokogawa Electric Corp Nuclear magnetic resonance imaging
US4593247A (en) * 1983-11-25 1986-06-03 General Electric Company Method of NMR imaging with off-center zoom scan
JPS60146140A (ja) * 1984-01-10 1985-08-01 Yokogawa Hokushin Electric Corp 核磁気共鳴による検査方法及びその装置
DE3414634A1 (de) * 1984-04-18 1985-10-24 Bruker Medizintechnik Gmbh, 7512 Rheinstetten Verfahren zum anregen einer probe fuer die nmr-tomographie
DE3430625A1 (de) * 1984-08-20 1986-02-27 Siemens AG, 1000 Berlin und 8000 München Einrichtung fuer die kernspin-tomographie
FR2570499B1 (fr) * 1984-09-14 1987-09-11 Thomson Cgr Installation d'imagerie par resonance magnetique nucleaire
DE3434161A1 (de) * 1984-09-18 1986-03-27 Bruker Medizintechnik Gmbh, 7512 Rheinstetten Verfahren zum messen der magnetischen kernresonanz
JPS6191550A (ja) * 1984-10-12 1986-05-09 Mitsubishi Electric Corp 核磁気共鳴映像法
FI75428C (fi) * 1984-11-21 1988-06-09 Instrumentarium Oy Foerfarande foer kartlaeggning av de kaernmagnetiska egenskaperna hos ett objekt, som skall undersoekas.
US4678995A (en) * 1984-12-12 1987-07-07 Yale University Apparatus and method for determining the presence of substances in a sample by NMR and producing an NMR image thereof
US4665365A (en) * 1985-01-07 1987-05-12 General Electric Company Method for reversing residual transverse magnetization due to phase-encoding magnetic field gradients
US4695800A (en) * 1985-06-06 1987-09-22 Technicare Corporation Non harmonic NMR spin echo imaging
JPH0785738B2 (ja) * 1985-06-29 1995-09-20 株式会社東芝 磁気共鳴映像装置
US4647858A (en) * 1985-07-29 1987-03-03 General Electric Company Methods for overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging
US4920522A (en) * 1986-05-05 1990-04-24 Siemens Aktiengesellschaft Method and apparatus for measuring electrical or magnetic fields
DE3618432A1 (de) * 1986-05-31 1987-12-03 Philips Patentverwaltung Kernspintomographieverfahren
US4714884A (en) * 1986-06-13 1987-12-22 General Electric Company Method of eliminating effects of spurious NMR signals caused by imperfect 180 degree RF pulses
US4761614A (en) * 1987-04-27 1988-08-02 Phospho-Energetics, Inc. Device and method for automatic shimming of NMR instrument
JPS6420436A (en) * 1987-07-15 1989-01-24 Toshiba Corp Magnetic resonance measuring instrument
US4882540A (en) * 1988-06-28 1989-11-21 Resonex, Inc. Magnetic resonance imaging (MRI)apparatus with quadrature radio frequency (RF) coils
US4959611A (en) * 1989-06-29 1990-09-25 Picker International, Inc. Out-of-slice artifact reduction technique for magnetic resonance imagers
DE3926889A1 (de) * 1989-08-16 1991-02-21 Spectrospin Ag Verfahren zur simultanen messung von nmr-signalen, insbesondere zur bestimmung von flussgeschwindigkeiten in der kernspintomographie mit hilfe der multiple slice fourier flow (=muff) methode
US5245283A (en) * 1991-08-07 1993-09-14 Picker International, Inc. Technique for shifting out-of-slice artifacts to the edge of the field of view
JPH05269106A (ja) * 1991-08-12 1993-10-19 Toshiba Corp 磁気共鳴方法および装置
JP2590641B2 (ja) * 1991-09-04 1997-03-12 株式会社日立製作所 核磁気共鳴を用いた検査装置
US5317263A (en) * 1993-03-17 1994-05-31 Bruker Instruments, Inc. Method for creating a z-rotation using radial pulses in NMR experiments involving coherence transformations
JP3505294B2 (ja) * 1995-03-28 2004-03-08 ジーイー横河メディカルシステム株式会社 Ｍｒｉ装置
DE19609839A1 (de) * 1996-03-13 1997-09-18 Philips Patentverwaltung MR-Spektroskopieverfahren
JP2872642B2 (ja) * 1996-12-04 1999-03-17 株式会社日立製作所 核磁気共鳴を用いた検査装置
JP2908380B2 (ja) * 1997-05-14 1999-06-21 株式会社日立製作所 核磁気共鳴を用いた検査装置
JP4732648B2 (ja) * 1999-08-05 2011-07-27 アメリカ合衆国 磁気共鳴映像法において位相ラベル付けにより目標の内部の運動および全体的な運動の写像を得る方法および装置
US7233818B1 (en) 1999-08-05 2007-06-19 United States Of America As Represented By The Secretary Of The Department Of Health And Human Services Methods and apparatus for mapping internal and bulk motion of an object with phase labeling in magnetic resonance imaging
US6721589B1 (en) 1999-11-30 2004-04-13 General Electric Company Rapid three-dimensional magnetic resonance tagging for studying material deformation and strain
US6392411B1 (en) * 2000-01-03 2002-05-21 Ge Yokogawa Medical Systems, Limited MR imaging method, phase shift measuring method and MR imaging system
JP2002143115A (ja) * 2000-10-30 2002-05-21 Ge Medical Systems Global Technology Co Llc Ｍｒイメージング方法、位相エラー測定方法およびｍｒｉ装置
FR2817047A1 (fr) * 2001-04-05 2002-05-24 Commissariat Energie Atomique Procede de mesure par resonance magnetique nucleaire avec suppression des echos
US8970217B1 (en) 2010-04-14 2015-03-03 Hypres, Inc. System and method for noise reduction in magnetic resonance imaging
GB2489403A (en) 2011-03-22 2012-10-03 Pepric Nv Isolating active electron spin signals in EPR by changing field direction
US9494668B2 (en) 2011-12-02 2016-11-15 The Johns Hopkins University Systems and methods for measuring nuclear magnetic resonance spin-lattice relaxation time T1 and spin-spin relaxation time T2
WO2014008315A1 (en) * 2012-07-06 2014-01-09 Acuitas Medical Limited Optimised pulse sequences for evaluating spatial frequency content of a selectively excited internal volume

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US4045723A (en) * 1975-12-15 1977-08-30 Varian Associates, Inc. Two dimensional gyromagnetic resonance spectroscopy
US4318043A (en) * 1978-07-20 1982-03-02 The Regents Of The University Of California Method and apparatus for rapid NMR imaging of nuclear densities within an object
US4431968A (en) * 1982-04-05 1984-02-14 General Electric Company Method of three-dimensional NMR imaging using selective excitation
US4563647A (en) * 1982-06-09 1986-01-07 Picker International Limited Nuclear magnetic resonance methods and apparatus

Also Published As

Publication number Publication date
EP0098426B1 (en) 1990-09-05
JPH0222647B2 (fi) 1990-05-21
FI832078L (fi) 1984-01-02
EP0098426A3 (en) 1986-05-28
FI832078A0 (fi) 1983-06-09
DE3381860D1 (de) 1990-10-11
US4484138A (en) 1984-11-20
FI78986B (fi) 1989-06-30
JPS5967450A (ja) 1984-04-17
IL68901A0 (en) 1983-10-31
FI78986C (fi) 1989-10-10
EP0098426A2 (en) 1984-01-18

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