DE69637202D1 - MRI-Gerät - Google Patents

MRI-Gerät

Info

Publication number
DE69637202D1
DE69637202D1 DE69637202T DE69637202T DE69637202D1 DE 69637202 D1 DE69637202 D1 DE 69637202D1 DE 69637202 T DE69637202 T DE 69637202T DE 69637202 T DE69637202 T DE 69637202T DE 69637202 D1 DE69637202 D1 DE 69637202D1
Authority
DE
Germany
Prior art keywords
mri machine
mri
machine
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
DE69637202T
Other languages
English (en)
Other versions
DE69637202T2 (de
Inventor
Takao Goto
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.)
GE Healthcare Japan Corp
Original Assignee
GE Yokogawa Medical System Ltd
Yokogawa Medical Systems Ltd
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 GE Yokogawa Medical System Ltd, Yokogawa Medical Systems Ltd filed Critical GE Yokogawa Medical System Ltd
Application granted granted Critical
Publication of DE69637202D1 publication Critical patent/DE69637202D1/de
Publication of DE69637202T2 publication Critical patent/DE69637202T2/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
    • G01R33/54—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
    • 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
    • G01R33/56527—Correction of image distortions, e.g. due to magnetic field inhomogeneities due to chemical shift effects
    • 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
    • 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)
  • 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)
DE69637202T 1995-03-28 1996-03-20 MRI-Gerät Expired - Fee Related DE69637202T2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP6908295 1995-03-28
JP6908295 1995-03-28
JP24285795A JP3505294B2 (ja) 1995-03-28 1995-09-21 Ｍｒｉ装置
JP24285795 1995-09-21

Publications (2)

Publication Number Publication Date
DE69637202D1 true DE69637202D1 (de) 2007-09-20
DE69637202T2 DE69637202T2 (de) 2008-05-08

Family

ID=26410260

Family Applications (4)

Application Number Title Priority Date Filing Date
DE69636397T Expired - Fee Related DE69636397T2 (de) 1995-03-28 1996-03-20 Kernresonanz-Bildgebungsvorrichtung
DE69637598T Expired - Fee Related DE69637598D1 (de) 1995-03-28 1996-03-20 MRI-Gerät
DE69630625T Expired - Fee Related DE69630625T2 (de) 1995-03-28 1996-03-20 Gerät zur Bilderzeugung mit magnetischer Resonanz
DE69637202T Expired - Fee Related DE69637202T2 (de) 1995-03-28 1996-03-20 MRI-Gerät

Family Applications Before (3)

Application Number Title Priority Date Filing Date
DE69636397T Expired - Fee Related DE69636397T2 (de) 1995-03-28 1996-03-20 Kernresonanz-Bildgebungsvorrichtung
DE69637598T Expired - Fee Related DE69637598D1 (de) 1995-03-28 1996-03-20 MRI-Gerät
DE69630625T Expired - Fee Related DE69630625T2 (de) 1995-03-28 1996-03-20 Gerät zur Bilderzeugung mit magnetischer Resonanz

Country Status (6)

Country Link
US (1) US5729139A (de)
EP (5) EP1115007B1 (de)
JP (1) JP3505294B2 (de)
KR (1) KR100225321B1 (de)
CN (3) CN100419450C (de)
DE (4) DE69636397T2 (de)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3384944B2 (ja) * 1996-07-11 2003-03-10 ジーイー横河メディカルシステム株式会社 Ｍｒｉ装置
US6008647A (en) * 1997-02-11 1999-12-28 General Electric Company Method for reducing Maxwell term artifacts in fast spin echo MR images
US6043656A (en) * 1998-11-23 2000-03-28 General Electric Company Method for compensating an MRI system for residual magnetization
JP2000157509A (ja) * 1998-11-23 2000-06-13 General Electric Co <Ge> Ｍｒｉシステムの較正方法、ｍｒｉシステム及びリセット勾配発生方法
JP3453089B2 (ja) * 1999-08-20 2003-10-06 ジーイー横河メディカルシステム株式会社 Ｍｒｉ装置
US6392411B1 (en) * 2000-01-03 2002-05-21 Ge Yokogawa Medical Systems, Limited MR imaging method, phase shift measuring method and MR imaging system
JP3853585B2 (ja) * 2000-10-11 2006-12-06 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 Ｍｒｉ装置
JP3858191B2 (ja) 2000-10-31 2006-12-13 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 Ｍｒｉ装置
DE10063676B4 (de) 2000-12-20 2006-08-17 Siemens Ag Multiecho-Bildgebungsverfahren
JP3878429B2 (ja) * 2001-04-05 2007-02-07 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 Ｍｒｉ装置
JP3814157B2 (ja) * 2001-04-17 2006-08-23 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 Ｍｒｉ装置
JP3884243B2 (ja) * 2001-06-21 2007-02-21 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 外部磁界測定方法、静磁界補正方法、外部磁界測定装置およびｍｒｉ装置
US6628116B1 (en) * 2001-09-06 2003-09-30 Ge Medical Systems Global Technology Co., Llc Process and apparatus to remove stimulated echo artifacts caused by interactions of a preparation sequence with a gradient echo sequence in MR imaging
JP3720752B2 (ja) * 2001-10-26 2005-11-30 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 ０次位相検出方法およびｍｒｉ装置
JP3796455B2 (ja) * 2002-02-22 2006-07-12 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 Ｍｒｉ装置
KR100998130B1 (ko) * 2002-05-15 2010-12-02 지멘스 악티엔게젤샤프트 자기공명 시스템
JP4347788B2 (ja) 2004-12-01 2009-10-21 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 Ｍｒｉ装置
CN100339050C (zh) * 2005-09-20 2007-09-26 华东师范大学 一种磁共振成像系统中减小梯度线圈涡流的方法
JP4576534B2 (ja) * 2006-03-28 2010-11-10 国立大学法人 筑波大学 磁気共鳴イメージング装置および撮像方法
JP5022696B2 (ja) * 2006-12-22 2012-09-12 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 磁気共鳴イメージング装置
US8498688B2 (en) * 2007-03-19 2013-07-30 Koninklijke Philips N.V. Magnetic resonance device and method
US9423480B2 (en) * 2008-10-27 2016-08-23 The University Of Western Ontario System and method for magnetic resonance imaging
JP5611882B2 (ja) * 2010-05-31 2014-10-22 株式会社東芝 磁気共鳴イメージング装置
JP5925529B2 (ja) * 2011-03-31 2016-05-25 株式会社東芝 磁気共鳴イメージング装置
KR101474757B1 (ko) * 2013-07-08 2014-12-19 삼성전자주식회사 자장 측정 방법 및 장치
JP2015128552A (ja) * 2014-01-09 2015-07-16 株式会社日立メディコ 磁気共鳴イメージング装置、及びその磁場印加方法
JP6591208B2 (ja) 2015-06-09 2019-10-16 キヤノン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
CN107621616B (zh) * 2017-08-01 2019-12-13 国家纳米科学中心 一种磁共振投影成像方法及装置
EP3680680A1 (de) * 2019-01-11 2020-07-15 Siemens Healthcare GmbH Verfahren zum erhalt eines optimierten betriebsparameters, speichermedium und magnetresonanzgerät
CN109946632B (zh) * 2019-03-06 2023-10-20 佛山瑞加图医疗科技有限公司 剩磁相位差测量方法及剩磁测量方法
CN110261801A (zh) * 2019-06-19 2019-09-20 上海东软医疗科技有限公司 一种射频激励方法及装置

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484138A (en) * 1982-07-01 1984-11-20 General Electric Company Method of eliminating effects of spurious free induction decay NMR signal caused by imperfect 180 degrees RF pulses
US4665365A (en) * 1985-01-07 1987-05-12 General Electric Company Method for reversing residual transverse magnetization due to phase-encoding magnetic field gradients
US4647858A (en) * 1985-07-29 1987-03-03 General Electric Company Methods for overcoming transient magnetic field inhomogeneity in nuclear magnetic resonance imaging
JPS6245917A (ja) * 1985-08-23 1987-02-27 Honda Motor Co Ltd 内燃機関の動弁装置
DE3637998A1 (de) * 1986-11-07 1988-05-11 Max Planck Gesellschaft Verfahren zur schnellen akquisition von spinresonanzdaten fuer eine ortsaufgeloeste untersuchung eines objekts
US5055790A (en) * 1989-07-13 1991-10-08 Picker International, Inc. Ssfp imaging technique with improved t1 contrast
NL9002842A (nl) * 1990-12-21 1992-07-16 Philips Nv Magnetische resonantie werkwijze en inrichting ter reductie van beeldfouten in een magnetisch resonantie beeld.
US5227728A (en) * 1991-11-01 1993-07-13 The Regents Of The University Of California Gradient driver control in magnetic resonance imaging
JPH05285116A (ja) * 1992-04-14 1993-11-02 Toshiba Corp 磁気共鳴イメージング方法
DE69326202T2 (de) * 1992-06-29 2000-04-13 Koninkl Philips Electronics Nv Verfahren und Gerät zur Kernresonanzabbildung
DE69329873T2 (de) * 1992-10-26 2001-09-13 Koninkl Philips Electronics Nv Kompensierung von Wirbelströmen in der Bilderzeugung mittels magnetischer Resonanz
EP0595391B1 (de) * 1992-10-26 2001-01-17 Koninklijke Philips Electronics N.V. Kompensierung von Wirbelströmen in der Bilderzeugung mittels magnetischer Resonanz
JPH06245917A (ja) * 1993-02-23 1994-09-06 Yokogawa Medical Syst Ltd Ｍｒｉ装置
JP2737608B2 (ja) * 1993-07-31 1998-04-08 株式会社島津製作所 Ｍｒイメージング装置
WO1995004939A2 (en) * 1993-08-02 1995-02-16 The Board Of Trustees Of The Leland Stanford Junior University Apparatus and method for decreasing magnetic field sensitivity of long rf pulses
JP2755125B2 (ja) * 1993-09-30 1998-05-20 株式会社島津製作所 Ｍｒイメージング装置
JP3483947B2 (ja) * 1993-10-14 2004-01-06 株式会社東芝 磁気共鳴イメージング装置

Also Published As

Publication number Publication date
DE69637202T2 (de) 2008-05-08
DE69636397D1 (de) 2006-09-07
EP0735379A2 (de) 1996-10-02
JP3505294B2 (ja) 2004-03-08
DE69636397T2 (de) 2007-08-02
EP1103819A3 (de) 2001-06-06
KR100225321B1 (ko) 1999-10-15
EP1103820A1 (de) 2001-05-30
DE69630625T2 (de) 2004-09-16
EP1103819B1 (de) 2007-08-08
US5729139A (en) 1998-03-17
EP1115006A2 (de) 2001-07-11
EP1115006A3 (de) 2001-08-01
EP1115007A1 (de) 2001-07-11
CN100465659C (zh) 2009-03-04
CN100419450C (zh) 2008-09-17
EP1115007B1 (de) 2008-07-09
CN1136667A (zh) 1996-11-27
JPH08322817A (ja) 1996-12-10
DE69630625D1 (de) 2003-12-18
CN1204412C (zh) 2005-06-01
EP1115006B1 (de) 2006-07-26
EP1103819A2 (de) 2001-05-30
KR960033403A (ko) 1996-10-22
CN1570662A (zh) 2005-01-26
DE69637598D1 (de) 2008-08-21
EP0735379B1 (de) 2003-11-12
EP0735379A3 (de) 1997-02-26
CN1326102A (zh) 2001-12-12

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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