JP2018175741A - 磁気共鳴イメージング装置 - Google Patents
磁気共鳴イメージング装置 Download PDFInfo
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- JP2018175741A JP2018175741A JP2017084137A JP2017084137A JP2018175741A JP 2018175741 A JP2018175741 A JP 2018175741A JP 2017084137 A JP2017084137 A JP 2017084137A JP 2017084137 A JP2017084137 A JP 2017084137A JP 2018175741 A JP2018175741 A JP 2018175741A
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- 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
- G01R33/50—NMR imaging systems based on the determination of relaxation times, e.g. T1 measurement by IR sequences; T2 measurement by multiple-echo sequences
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- 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
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- 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
- G01R33/5602—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by filtering or weighting based on different relaxation times within the sample, e.g. T1 weighting using an inversion pulse
-
- 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
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- 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
- G01R33/567—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution gated by physiological signals, i.e. synchronization of acquired MR data with periodical motion of an object of interest, e.g. monitoring or triggering system for cardiac or respiratory gating
- G01R33/5676—Gating or triggering based on an MR signal, e.g. involving one or more navigator echoes for motion monitoring and correction
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- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
Claims (10)
- 信号収集のための第1のパルスシーケンスに先立ち、縦磁化及び横磁化を低減させるため、被検体に強度及び位相の少なくとも一方を変化させながら複数のRF磁場パルスを印加すると共に複数のスポイラー傾斜磁場パルスを印加する第2のパルスシーケンスを実行する制御部を具備する磁気共鳴イメージング装置。
- 前記制御部は、位相エンコードライン毎に前記第1のパルスシーケンスに先立ち前記第2のパルスシーケンスを実行する、請求項1記載の磁気共鳴イメージング装置。
- 前記制御部は、前記第2のパルスシーケンスにおいて、強度及び位相をランダムに変化させながら前記複数のRF磁場パルスを印加する、請求項1記載の磁気共鳴イメージング装置。
- 前記制御部は、前記第2のパルスシーケンスにおいて、RF磁場パルスとスポイラー傾斜磁場パルスとを他のパルスの介在なしに交互に印加する、請求項1記載の磁気共鳴イメージング装置。
- 前記制御部は、縦磁化及び横磁化を略ゼロにするために前記第2のパルスシーケンスを実行する、請求項1記載の磁気共鳴イメージング装置。
- 前記制御部は、前記第1のパルスシーケンスにおいて、MRFのためのパルスシーケンスを実行する、請求項1記載の磁気共鳴イメージング装置。
- 複数の定量値と前記複数の定量値に基づきそれぞれシミュレーションされた複数の予測信号値波形とを関連付けた辞書を記憶する辞書記憶部と、
前記MRFのためのパルスシーケンスにより収集されたMR信号に基づく信号値波形を前記辞書に照らし合わせて前記定量値に関する画像を生成する定量値画像生成部と、
を更に備える請求項6記載の磁気共鳴イメージング装置。 - 前記複数の予測信号値波形は、縦磁化及び横磁化の初期値がゼロであるという条件に基づきシミュレーションされ、
請求項7記載の磁気共鳴イメージング装置。 - 前記制御部は、前記第1のパルスシーケンスにおいて、開始時から中途時にかけて、強度がゼロから徐々に大きくなるように強度を異ならせて複数のRF磁場パルスを印加する、請求項1記載の磁気共鳴イメージング装置。
- 前記制御部は、ナビゲータエコーの印加後、前記第2のパルスシーケンスを実行し、前記第2のパルスシーケンスの実行後に前記第1のパルスシーケンスを実行する、請求項1記載の磁気共鳴イメージング装置。
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JP2017084137A JP6956509B2 (ja) | 2017-04-21 | 2017-04-21 | 磁気共鳴イメージング装置 |
US15/789,207 US10591563B2 (en) | 2017-04-21 | 2017-10-20 | Magnetic resonance imaging apparatus |
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JP2017084137A JP6956509B2 (ja) | 2017-04-21 | 2017-04-21 | 磁気共鳴イメージング装置 |
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JP2018175741A true JP2018175741A (ja) | 2018-11-15 |
JP6956509B2 JP6956509B2 (ja) | 2021-11-02 |
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Cited By (1)
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KR102092908B1 (ko) * | 2019-01-15 | 2020-03-24 | 연세대학교 산학협력단 | 호흡 움직임 보정을 위한 자기 공명 영상 장치 |
Families Citing this family (3)
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CN110346741A (zh) * | 2018-04-06 | 2019-10-18 | 凯斯西储大学 | 使用多个脉冲序列类型的磁共振指纹的系统和方法 |
CN109659010B (zh) * | 2018-12-13 | 2021-02-19 | 上海联影医疗科技股份有限公司 | 医疗图像设备成像协议调节方法、装置、存储介质及设备 |
EP3761052B1 (en) * | 2019-07-04 | 2023-02-22 | Siemens Healthcare GmbH | Simultaneous multi-slice 2d magnetic resonance imaging with compressed sensing |
Citations (5)
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US20100013478A1 (en) * | 2006-10-06 | 2010-01-21 | Takayuki Abe | Magnetic resonance imaging device |
US20130211239A1 (en) * | 2004-11-16 | 2013-08-15 | Yi Wang | Magnetic resonance imaging concepts |
US20130265047A1 (en) * | 2011-03-18 | 2013-10-10 | Case Western Reserve University | Nuclear Magnetic Resonance (NMR) Fingerprinting |
JP2015528384A (ja) * | 2012-09-19 | 2015-09-28 | ケース ウェスタン リザーブ ユニバーシティCase Westernreserve University | 核磁気共鳴(nmr)フィンガープリンティング |
JP2016007539A (ja) * | 2014-06-23 | 2016-01-18 | 株式会社東芝 | 磁気共鳴イメージング装置 |
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US5908386A (en) * | 1995-12-14 | 1999-06-01 | Regents Of The Universotiy Of Minnesota | Fast MRI for assessment of myocardial perfusion with arrythmia insensitive magnetization preparation |
US7479783B2 (en) * | 2006-11-15 | 2009-01-20 | Beth Israel Deaconess Medical Center, Inc. | Echo train preparation for fast spin-echo acquisition |
US8618797B2 (en) * | 2010-07-23 | 2013-12-31 | General Electric Company | Composite spin locking pulse sequence and method of using the same |
JP2012095891A (ja) | 2010-11-04 | 2012-05-24 | Hitachi Medical Corp | 磁気共鳴イメージング装置 |
JP6045793B2 (ja) * | 2012-01-13 | 2016-12-14 | 東芝メディカルシステムズ株式会社 | 磁気共鳴撮像装置 |
US10092199B2 (en) * | 2014-04-01 | 2018-10-09 | Siemens Healthcare Gmbh | MR imaging apparatus and method for generating a perfusion image with motion correction |
US10614359B2 (en) * | 2014-04-19 | 2020-04-07 | Case Western Reserve University | Magnetic resonance fingerprinting (MRF) serial artificial neural network (ANN) sequence design |
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- 2017-04-21 JP JP2017084137A patent/JP6956509B2/ja active Active
- 2017-10-20 US US15/789,207 patent/US10591563B2/en active Active
Patent Citations (6)
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US20130211239A1 (en) * | 2004-11-16 | 2013-08-15 | Yi Wang | Magnetic resonance imaging concepts |
US20100013478A1 (en) * | 2006-10-06 | 2010-01-21 | Takayuki Abe | Magnetic resonance imaging device |
JP2015024336A (ja) * | 2006-10-06 | 2015-02-05 | 株式会社日立メディコ | 磁気共鳴イメージング装置 |
US20130265047A1 (en) * | 2011-03-18 | 2013-10-10 | Case Western Reserve University | Nuclear Magnetic Resonance (NMR) Fingerprinting |
JP2015528384A (ja) * | 2012-09-19 | 2015-09-28 | ケース ウェスタン リザーブ ユニバーシティCase Westernreserve University | 核磁気共鳴(nmr)フィンガープリンティング |
JP2016007539A (ja) * | 2014-06-23 | 2016-01-18 | 株式会社東芝 | 磁気共鳴イメージング装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR102092908B1 (ko) * | 2019-01-15 | 2020-03-24 | 연세대학교 산학협력단 | 호흡 움직임 보정을 위한 자기 공명 영상 장치 |
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JP6956509B2 (ja) | 2021-11-02 |
US20180306881A1 (en) | 2018-10-25 |
US10591563B2 (en) | 2020-03-17 |
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