DE3789933T2 - Verfahren zur Korrektur der durch Änderung des statischen Magnetfeldes verursachten Positions-Abweichung in NMR-Abbildungsgeräten. - Google Patents

Verfahren zur Korrektur der durch Änderung des statischen Magnetfeldes verursachten Positions-Abweichung in NMR-Abbildungsgeräten.

Info

Publication number
DE3789933T2
DE3789933T2 DE3789933T DE3789933T DE3789933T2 DE 3789933 T2 DE3789933 T2 DE 3789933T2 DE 3789933 T DE3789933 T DE 3789933T DE 3789933 T DE3789933 T DE 3789933T DE 3789933 T2 DE3789933 T2 DE 3789933T2
Authority
DE
Germany
Prior art keywords
correcting
changing
magnetic field
positional deviation
imaging devices
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 - Fee Related
Application number
DE3789933T
Other languages
English (en)
Other versions
DE3789933D1 (de
Inventor
Hiroshi Nishimura
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.)
Hitachi Healthcare Manufacturing Ltd
Original Assignee
Hitachi Medical Corp
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 Hitachi Medical Corp filed Critical Hitachi Medical Corp
Publication of DE3789933D1 publication Critical patent/DE3789933D1/de
Application granted granted Critical
Publication of DE3789933T2 publication Critical patent/DE3789933T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G01R33/483—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
    • G01R33/4833—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
DE3789933T 1986-10-29 1987-10-29 Verfahren zur Korrektur der durch Änderung des statischen Magnetfeldes verursachten Positions-Abweichung in NMR-Abbildungsgeräten. Expired - Fee Related DE3789933T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61255666A JPS63109849A (ja) 1986-10-29 1986-10-29 Ｎｍｒイメ−ジング装置

Publications (2)

Publication Number Publication Date
DE3789933D1 DE3789933D1 (de) 1994-07-07
DE3789933T2 true DE3789933T2 (de) 1994-09-08

Family

ID=17281925

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3752175T Expired - Fee Related DE3752175T2 (de) 1986-10-29 1987-10-29 Verfahren zur Korrektur der durch Änderung des statischen Magnetfeldes verursachten Positionsabweichung in NMR-Abbildungsgeräten
DE3789933T Expired - Fee Related DE3789933T2 (de) 1986-10-29 1987-10-29 Verfahren zur Korrektur der durch Änderung des statischen Magnetfeldes verursachten Positions-Abweichung in NMR-Abbildungsgeräten.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE3752175T Expired - Fee Related DE3752175T2 (de) 1986-10-29 1987-10-29 Verfahren zur Korrektur der durch Änderung des statischen Magnetfeldes verursachten Positionsabweichung in NMR-Abbildungsgeräten

Country Status (4)

Country Link
US (1) US4789833A (de)
EP (2) EP0265956B1 (de)
JP (1) JPS63109849A (de)
DE (2) DE3752175T2 (de)

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GB8702951D0 (en) * 1987-02-10 1987-03-18 Surrey Medical Imaging Systems Nmr imaging
JP2595006B2 (ja) * 1988-01-29 1997-03-26 株式会社日立製作所 Ｍｒイメージング方法
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
JPH01308538A (ja) * 1988-06-07 1989-12-13 Toshiba Corp Ｍｒｉ装置
US4970457A (en) * 1989-04-05 1990-11-13 The Regents Of The University Of California MRI compensated for spurious rapid variations in static magnetic field during a single MRI sequence
JPH0312130A (ja) * 1989-06-09 1991-01-21 Fuji Electric Co Ltd 磁気共鳴イメージング装置
DE4005675C2 (de) * 1990-02-22 1995-06-29 Siemens Ag Verfahren zur Unterdrückung von Artefakten bei der Bilderzeugung mittels kernmagnetischer Resonanz
GB9006320D0 (en) * 1990-03-21 1990-05-16 Gen Electric Co Plc Nuclear magnetic resonance apparatus
JPH05103768A (ja) * 1991-03-20 1993-04-27 Hitachi Ltd 磁気共鳴イメージング方法
JPH05300895A (ja) * 1991-07-31 1993-11-16 Hitachi Medical Corp Ｍｒｉ装置における核スピンの選択励起方法
DE4416363C2 (de) * 1994-05-09 1996-03-21 Siemens Ag Rekonstruktion von Bildern aus MR-Signalen in inhomogenen Magnetfeldern
DE19508238A1 (de) * 1995-03-08 1996-09-12 Siemens Ag Verfahren zur Magnetfeldstabilisierung bei einem Magneten für Kernspintomographieanlagen und Anordnung zur Durchführung des Verfahrens
US5932342A (en) * 1996-11-14 1999-08-03 Nashua Corporation Optical diffusers obtained by fluid phase mixing of incompatible materials
DE19931210C2 (de) * 1999-07-06 2001-06-07 Siemens Ag Verfahren zur Korrektur von Artefakten in Magnetresonanzbildern
JP3951590B2 (ja) * 2000-10-27 2007-08-01 株式会社日立製作所 荷電粒子線装置
JP3992674B2 (ja) * 2003-09-25 2007-10-17 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー 磁気共鳴撮影装置
JP4619674B2 (ja) * 2004-03-24 2011-01-26 株式会社東芝 磁気共鳴イメージング装置
JP4798350B2 (ja) * 2005-10-26 2011-10-19 学校法人慶應義塾 磁気共鳴法を用いて試料中のプロトン性溶媒の挙動の分布を測定する測定装置、測定方法およびプログラム
JP6184050B2 (ja) * 2010-07-02 2017-08-23 東芝メディカルシステムズ株式会社 磁気共鳴イメージング装置
CN106680750B (zh) * 2016-12-29 2019-07-19 上海联影医疗科技有限公司 磁共振匀场图像获取方法、匀场方法及磁共振系统
US20240069134A1 (en) * 2021-02-24 2024-02-29 Case Western Reserve University System and method for b1-selective excitation for spatial localization in magnetic resonance imaging
CN116559740B (zh) * 2023-03-16 2024-01-12 中国科学院精密测量科学与技术创新研究院 一种精确测量脉冲强磁场峰值场强分布的nmr方法与系统

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GB1499666A (en) * 1974-05-06 1978-02-01 Burmah Oil Trading Ltd Production of phenols
US4284950A (en) * 1978-08-05 1981-08-18 E M I Limited Imaging systems
JPS5934137A (ja) * 1982-08-19 1984-02-24 Shimadzu Corp 核磁気共鳴映像法
JPS59142444A (ja) * 1983-02-04 1984-08-15 Hitachi Ltd 核磁気共鳴を用いた検査装置
US4685468A (en) * 1983-03-18 1987-08-11 Albert Macovski NMR imaging system using field compensation
JPS59202050A (ja) * 1983-04-30 1984-11-15 Toshiba Corp 核磁気共鳴映像装置
US4581582A (en) * 1983-12-27 1986-04-08 General Electric Company High-spatial-resolution spectroscopic NMR imaging of chemically-shifted nuclei
JPS60161552A (ja) * 1984-02-01 1985-08-23 Hitachi Ltd Νｍｒ検査装置の静磁場強度分布測定方法
US4585992A (en) * 1984-02-03 1986-04-29 Philips Medical Systems, Inc. NMR imaging methods
JPS60168444A (ja) * 1984-02-14 1985-08-31 株式会社東芝 診断用核磁気共鳴映像装置
JPS60189905A (ja) * 1984-03-09 1985-09-27 Mitsubishi Electric Corp 高均一磁界発生装置
JPS60194339A (ja) * 1984-03-15 1985-10-02 Toshiba Corp 核磁気共鳴装置
DE3411222A1 (de) * 1984-03-27 1985-10-10 Philips Patentverwaltung Gmbh, 2000 Hamburg Kernspintomograph
JPS60222044A (ja) * 1984-04-20 1985-11-06 横河電機株式会社 核磁気共鳴による診断方法および装置
JPS6123953A (ja) * 1984-07-11 1986-02-01 Jeol Ltd 核磁気共鳴装置
US4523166A (en) * 1984-10-19 1985-06-11 General Electric Company Optimal field inhomogeneity correction coil operation for NMR magnets
US4647858A (en) * 1985-07-29 1987-03-03 General Electric Company Methods for overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging
US4663591A (en) * 1985-08-16 1987-05-05 General Electric Company Method for reducing image artifacts due to periodic signal variations in NMR imaging
US4720679A (en) * 1985-12-31 1988-01-19 Picker International, Inc. Magnetic resonance imaging with phase encoded chemical shift correction

Also Published As

Publication number Publication date
EP0585973B1 (de) 1998-03-04
DE3789933D1 (de) 1994-07-07
JPH0580904B2 (de) 1993-11-10
US4789833A (en) 1988-12-06
EP0585973A1 (de) 1994-03-09
DE3752175T2 (de) 1998-11-05
EP0265956A2 (de) 1988-05-04
EP0265956B1 (de) 1994-06-01
DE3752175D1 (de) 1998-04-09
JPS63109849A (ja) 1988-05-14
EP0265956A3 (en) 1989-08-16

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee