WO2009057353A1 - 磁気共鳴撮影装置 - Google Patents

磁気共鳴撮影装置 Download PDF

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Publication number
WO2009057353A1
WO2009057353A1 PCT/JP2008/062274 JP2008062274W WO2009057353A1 WO 2009057353 A1 WO2009057353 A1 WO 2009057353A1 JP 2008062274 W JP2008062274 W JP 2008062274W WO 2009057353 A1 WO2009057353 A1 WO 2009057353A1
Authority
WO
WIPO (PCT)
Prior art keywords
signals
acquired
eddy current
space
unnecessary
Prior art date
Application number
PCT/JP2008/062274
Other languages
English (en)
French (fr)
Inventor
Toru Shirai
Yoshitaka Bito
Yukari Yamamoto
Satoshi Hirata
Original Assignee
Hitachi Medical Corporation
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 Corporation filed Critical Hitachi Medical Corporation
Priority to JP2009538962A priority Critical patent/JP4889791B2/ja
Priority to US12/741,086 priority patent/US20100272337A1/en
Publication of WO2009057353A1 publication Critical patent/WO2009057353A1/ja

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
    • 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
    • G01R33/483—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
    • G01R33/485—NMR imaging systems with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy based on chemical shift information [CSI] or spectroscopic imaging, e.g. to acquire the spatial distributions of metabolites
    • 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]
    • G01R33/5618—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] using both RF and gradient refocusing, e.g. GRASE

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)
  • Spectroscopy & Molecular Physics (AREA)
  • Optics & Photonics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

　代謝物質からの信号を計測するために不要な信号を除去しつつ、渦電流補正に必要なデータを短時間で取得する。計測対象としない不要な物質からの信号を除去するとともに、渦電流によるスペクトル歪を補正するための位相データを１の計測で取得する。不要な物質からの信号の、強度の絶対値が同じで極性が逆になるように強度を調整した２種類の周波数選択パルスを、少なくとも１軸の位相エンコードごとに強度を変化させながら印加し、取得した信号をｋ空間に配置する。ｋ空間データから得られる画像データの折り返しを除去することにより不要物質からの信号を除去し、ｋ空間データの一部を用いて渦電流補正用の位相データを算出する。
PCT/JP2008/062274 2007-11-01 2008-07-07 磁気共鳴撮影装置 WO2009057353A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009538962A JP4889791B2 (ja) 2007-11-01 2008-07-07 磁気共鳴撮影装置
US12/741,086 US20100272337A1 (en) 2007-11-01 2008-07-07 Magnetic resonance imaging apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007284945 2007-11-01
JP2007-284945 2007-11-01

Publications (1)

Publication Number Publication Date
WO2009057353A1 true WO2009057353A1 (ja) 2009-05-07

Family

ID=40590756

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/062274 WO2009057353A1 (ja) 2007-11-01 2008-07-07 磁気共鳴撮影装置

Country Status (3)

Country Link
US (1) US20100272337A1 (ja)
JP (1) JP4889791B2 (ja)
WO (1) WO2009057353A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012057222A1 (ja) * 2010-10-28 2012-05-03 株式会社 日立メディコ 磁気共鳴撮影装置
JP2015180246A (ja) * 2014-03-07 2015-10-15 株式会社東芝 磁気共鳴イメージング装置
KR101625712B1 (ko) 2012-03-22 2016-05-30 지멘스 악티엔게젤샤프트 자기 공명 시스템을 이용하여 검사체의 미리 정해진 체적 구역에서 ｍｒ 데이터를 취득하는 방법, 및 이에 대응하는 자기 공명 시스템

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101843483B (zh) * 2009-03-23 2012-07-18 西门子(深圳)磁共振有限公司 一种水脂分离实现方法和装置
WO2011108314A1 (ja) * 2010-03-03 2011-09-09 株式会社 日立メディコ 磁気共鳴撮影装置
CN104955390A (zh) * 2013-02-12 2015-09-30 株式会社日立医疗器械 磁共振成像装置及其测量方法
JP6058477B2 (ja) * 2013-06-14 2017-01-11 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
US9971008B2 (en) * 2014-09-30 2018-05-15 Toshiba Medical Systems Corporation MRI gradient trajectory mapping
KR101611451B1 (ko) 2014-11-03 2016-04-11 삼성전자주식회사 자기 공명 영상 처리 장치 및 방법
US9911062B1 (en) * 2015-10-20 2018-03-06 Ohio State Innovation Foundation Background phase correction for quantitative cardiovascular MRI

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0556949A (ja) * 1991-09-03 1993-03-09 Toshiba Corp 磁気共鳴イメージング装置
JPH05277086A (ja) * 1992-04-02 1993-10-26 Yokogawa Medical Syst Ltd Ｍｒｉ装置のｉｒ法を適用したエコー収集方法
JPH0871057A (ja) * 1994-09-06 1996-03-19 Toshiba Corp 磁気共鳴診断装置
JP2001161657A (ja) * 1999-12-08 2001-06-19 Hitachi Medical Corp 核磁気共鳴撮影装置
JP2006175231A (ja) * 2004-12-21 2006-07-06 Siemens Ag 画像内の不均一性の補正方法および画像化装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4585993A (en) * 1983-12-14 1986-04-29 General Electric Company Method for selective NMR imaging of chemically-shifted nuclei
US6777934B2 (en) * 1999-12-08 2004-08-17 Hitachi Medical Corporation Magnetic resonance imaging method and apparatus
DE10338075B4 (de) * 2003-08-19 2008-05-15 Siemens Ag Verfahren zur ortsaufgelösten Messung der B1-Feldverteilung bei MR-Messungen
US7042218B2 (en) * 2004-05-06 2006-05-09 General Electric Company System and method for reducing auditory perception of noise associated with a medical imaging process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0556949A (ja) * 1991-09-03 1993-03-09 Toshiba Corp 磁気共鳴イメージング装置
JPH05277086A (ja) * 1992-04-02 1993-10-26 Yokogawa Medical Syst Ltd Ｍｒｉ装置のｉｒ法を適用したエコー収集方法
JPH0871057A (ja) * 1994-09-06 1996-03-19 Toshiba Corp 磁気共鳴診断装置
JP2001161657A (ja) * 1999-12-08 2001-06-19 Hitachi Medical Corp 核磁気共鳴撮影装置
JP2006175231A (ja) * 2004-12-21 2006-07-06 Siemens Ag 画像内の不均一性の補正方法および画像化装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012057222A1 (ja) * 2010-10-28 2012-05-03 株式会社 日立メディコ 磁気共鳴撮影装置
JP5636058B2 (ja) * 2010-10-28 2014-12-03 株式会社日立メディコ 磁気共鳴撮影装置
US9389289B2 (en) 2010-10-28 2016-07-12 Hitachi Medical Corporation Magnetic resonance imaging device
KR101625712B1 (ko) 2012-03-22 2016-05-30 지멘스 악티엔게젤샤프트 자기 공명 시스템을 이용하여 검사체의 미리 정해진 체적 구역에서 ｍｒ 데이터를 취득하는 방법, 및 이에 대응하는 자기 공명 시스템
JP2015180246A (ja) * 2014-03-07 2015-10-15 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
JP4889791B2 (ja) 2012-03-07
US20100272337A1 (en) 2010-10-28
JPWO2009057353A1 (ja) 2011-03-10

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