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DE3381860D1 - Verfahren zur eliminierung der wirkung von unechten, frei abklingenden kernmagnetischen induktionssignalen, verursacht durch unvollkommene 180 grad-hochfrequenzimpulse. - Google Patents

Verfahren zur eliminierung der wirkung von unechten, frei abklingenden kernmagnetischen induktionssignalen, verursacht durch unvollkommene 180 grad-hochfrequenzimpulse.

Info

Publication number
DE3381860D1
DE3381860D1 DE8383105911T DE3381860T DE3381860D1 DE 3381860 D1 DE3381860 D1 DE 3381860D1 DE 8383105911 T DE8383105911 T DE 8383105911T DE 3381860 T DE3381860 T DE 3381860T DE 3381860 D1 DE3381860 D1 DE 3381860D1
Authority
DE
Germany
Prior art keywords
imperfected
unexpected
eliminating
free
effect
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE8383105911T
Other languages
English (en)
Inventor
Paul Arthur Bottomley
William Alan Edelstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of DE3381860D1 publication Critical patent/DE3381860D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
DE8383105911T 1982-07-01 1983-06-16 Verfahren zur eliminierung der wirkung von unechten, frei abklingenden kernmagnetischen induktionssignalen, verursacht durch unvollkommene 180 grad-hochfrequenzimpulse. Expired - Lifetime DE3381860D1 (de)

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 (1)

Publication Number Publication Date
DE3381860D1 true DE3381860D1 (de) 1990-10-11

Family

ID=23558606

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383105911T Expired - Lifetime DE3381860D1 (de) 1982-07-01 1983-06-16 Verfahren zur eliminierung der wirkung von unechten, frei abklingenden kernmagnetischen induktionssignalen, verursacht durch unvollkommene 180 grad-hochfrequenzimpulse.

Country Status (6)

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

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US4549139A (en) * 1983-06-03 1985-10-22 General Electric Company Method of accurate and rapid NMR imaging of computed T1 and spin density
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
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
US4587489A (en) * 1983-10-07 1986-05-06 General Electric Company Method for rapid acquisition of NMR data
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GB2148013B (en) * 1983-10-12 1988-02-03 Yokogawa Electric Corp Nuclear magnetic resonance imaging
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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
DE3775269D1 (de) * 1986-05-05 1992-01-30 Siemens Ag Verfahren zur messung elektrischer oder magnetischer wechselfelder und anordnung zur durchfuehrung des verfahrens.
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
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
CA2378184C (en) * 1999-08-05 2009-05-26 The Government Of The United States Of America As Represented By The Secretary, 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 (de) 1990-09-05
FI78986C (fi) 1989-10-10
EP0098426A2 (de) 1984-01-18
IL68901A (en) 1987-11-30
JPS5967450A (ja) 1984-04-17
IL68901A0 (en) 1983-10-31
FI832078L (fi) 1984-01-02
FI832078A0 (fi) 1983-06-09
EP0098426A3 (en) 1986-05-28
FI78986B (fi) 1989-06-30
US4484138A (en) 1984-11-20
JPH0222647B2 (de) 1990-05-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: VOIGT, R., DIPL.-ING., PAT.-ANW., 6232 BAD SODEN

8320 Willingness to grant licences declared (paragraph 23)