JP5584384B2 - 並列rf送信による空間−スペクトル励起のための方法及びシステム - Google Patents
並列rf送信による空間−スペクトル励起のための方法及びシステム Download PDFInfo
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- JP5584384B2 JP5584384B2 JP2005351600A JP2005351600A JP5584384B2 JP 5584384 B2 JP5584384 B2 JP 5584384B2 JP 2005351600 A JP2005351600 A JP 2005351600A JP 2005351600 A JP2005351600 A JP 2005351600A JP 5584384 B2 JP5584384 B2 JP 5584384B2
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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
- G01R33/561—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
- G01R33/5611—Parallel magnetic resonance imaging, e.g. sensitivity encoding [SENSE], simultaneous acquisition of spatial harmonics [SMASH], unaliasing by Fourier encoding of the overlaps using the temporal dimension [UNFOLD], k-t-broad-use linear acquisition speed-up technique [k-t-BLAST], k-t-SENSE
-
- 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
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
- G01R33/3415—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils comprising arrays of sub-coils, i.e. phased-array coils with flexible receiver channels
-
- 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]
- G01R33/446—Multifrequency selective RF pulses, e.g. multinuclear acquisition mode
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (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)
- Magnetic Resonance Imaging Apparatus (AREA)
Description
102 キーボード/制御パネル
104 ディスプレイ
106 画像処理装置モジュール
107 コンピュータ・システム
108 CPUモジュール
111 ディスク記憶装置
112 テープ駆動装置
113 メモリ・モジュール
115 高速シリアルリンク
116 リンク
119 CPUモジュール
121 パルス発生器モジュール
122 システム制御部
125 シリアルリンク
127 傾斜増幅器
129 生理学的収集制御器
133 スキャン室インタフェース回路
134 位置決めデバイス
139 傾斜コイル・アセンブリ
140 偏向用マグネット
141 マグネット・アセンブリ
142 ボリューム
150 送受信器モジュール
151 RF増幅器
152 RFコイル
153 前置増幅器
154 送信/受信スイッチ
160 メモリ・モジュール
161 アレイ処理装置
200 被検体
202 送信コイル
203 送信コイル
204 送信コイル
205 送信コイル
206 送信コイル
207 送信コイル
Claims (6)
- 互いに空間的に異なるように配列され、かつ無線周波数(RF)パルスに応じた化学シフト・スペクトルについて選択可能な核磁気共鳴(NMR)励起を誘導する送信コイル(202〜207)と、
第1および第2の傾斜コイルと、
を備える磁気共鳴イメージング(MRI)システムであって、
前記第1の傾斜コイルが第1の空間周波数軸に沿って第1の傾斜パルスに応じた第1の磁場傾斜を発生し、前記第2の傾斜コイルが第2の空間周波数軸に沿って第2の傾斜パルスに応じた第2の磁場傾斜を発生し、
前記NMR励起は、前記第1および前記第2の磁場傾斜による第1および第2の空間次元について選択可能であり、
前記NMR励起中に、前記RFパルスが、前記第1および前記第2の傾斜パルスと同時に印加され、
前記第1および前記第2の傾斜パルスが、異なる波形であり、
前記RFパルスならびに前記第1および前記第2の傾斜パルスは、k空間サンプリング密度が小さな、パルス長の短いパルスである、
磁気共鳴イメージング(MRI)システム。 - 前記NMR励起は、2つの空間次元と1つの周波数次元について同時に選択可能である、請求項1に記載のMRIシステム。
- 前記NMR励起は、3つの空間次元と1つの周波数次元について同時に選択可能である、請求項1に記載のMRIシステム。
- k空間サンプリング軌道が外方渦巻き線/内方渦巻き線の反復パターンを備えている、請求項1から3のいずれかに記載のMRIシステム。
- 磁気共鳴イメージング(MRI)のための方法であって、
複数の送信コイルと複数の傾斜コイルとに同時に電流パルスを印加して、対象の選択された空間領域及び選択された共鳴周波数帯域にわたって核磁気共鳴(NMR)励起を誘導する工程を含み、
前記複数の傾斜コイルは、前記NMR励起中に複数の空間周波数軸に沿って振動する複数の磁場傾斜を発生し、前記NMR励起に応じた空間領域の少なくとも1つの画像を生成し、
前記NMR励起中に、前記複数の傾斜コイルに異なる波形の電流パルスが印加され、
前記RFパルスならびに前記第1および前記第2の傾斜パルスは、k空間サンプリング密度が小さな、パルス長の短いパルスである、
方法。 - 前記NMR励起中に、外方渦巻き線と内方渦巻き線との反復パターンで構成されるk空間軌道に沿ったk空間サンプリング工程をさらに含む請求項5に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/017,489 US7307419B2 (en) | 2004-12-20 | 2004-12-20 | Method and system for spatial-spectral excitation by parallel RF transmission |
US11/017,489 | 2004-12-20 |
Publications (2)
Publication Number | Publication Date |
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JP2006175223A JP2006175223A (ja) | 2006-07-06 |
JP5584384B2 true JP5584384B2 (ja) | 2014-09-03 |
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JP2005351600A Active JP5584384B2 (ja) | 2004-12-20 | 2005-12-06 | 並列rf送信による空間−スペクトル励起のための方法及びシステム |
Country Status (3)
Country | Link |
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US (1) | US7307419B2 (ja) |
JP (1) | JP5584384B2 (ja) |
NL (1) | NL1030695C2 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7385396B2 (en) * | 2006-04-20 | 2008-06-10 | General Electric Company | SAR reduction in MR imaging with parallel RF transmission |
US7808240B2 (en) * | 2008-04-30 | 2010-10-05 | General Electric Company | Apparatus and method for optimizing the spectra of parallel excitation pulses |
US8311641B2 (en) * | 2008-12-04 | 2012-11-13 | General Electric Company | Method and apparatus for generating a localized heating |
JP5868028B2 (ja) * | 2010-05-27 | 2016-02-24 | 株式会社東芝 | 磁気共鳴イメージング装置 |
CN103767705B (zh) | 2012-10-23 | 2017-12-22 | 三星电子株式会社 | 磁共振成像系统和磁共振成像方法 |
KR101967246B1 (ko) * | 2013-01-21 | 2019-04-09 | 삼성전자주식회사 | 자기공명영상 시스템, 데이터 처리장치 및 자기공명영상 생성 방법 |
US9594144B2 (en) | 2014-04-23 | 2017-03-14 | General Electric Company | Low-noise magnetic resonance imaging using low harmonic pulse sequences |
Family Cites Families (25)
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US4629988A (en) * | 1984-07-02 | 1986-12-16 | General Electric Company | Method of imaging by depth-resolved surface coil spectroscopy |
US4812760A (en) * | 1987-07-27 | 1989-03-14 | General Electric Company | Multi-dimensional selective NMR excitation with a single RF pulse |
JPH01293861A (ja) * | 1988-05-24 | 1989-11-27 | Toshiba Corp | 磁気共鳴診断装置 |
NL8801588A (nl) * | 1988-06-22 | 1990-01-16 | Philips Nv | Werkwijze en inrichting voor het volumeselectief bepalen van een nmr-spectrum door middel van selectieve polarisatieoverdracht-pulssequenties. |
US4999580A (en) * | 1989-06-20 | 1991-03-12 | The Board Of Trustees Of The Leland Stanford Junior University | magnetic resonance imaging and spectroscopy using a single excitation pulse for simultaneous spatial and spectral selectivity |
US4995394A (en) * | 1989-08-11 | 1991-02-26 | General Electric Company | Fast NMR cardiac profile imaging |
US5133357A (en) * | 1991-02-07 | 1992-07-28 | General Electric Company | Quantitative measurement of blood flow using cylindrically localized fourier velocity encoding |
US5270653A (en) * | 1992-04-10 | 1993-12-14 | The Board Of Trustees Of The Leland Stanford Junior University | Selective three dimensional excitation for magnetic resonance applications |
US5283526A (en) * | 1992-07-01 | 1994-02-01 | Board Of Trustees Of The Leland Stanford Junior University | Method for performing single and multiple slice magnetic resonance spectroscopic imaging |
US5578921A (en) * | 1995-01-10 | 1996-11-26 | Board Of Trustees Of The Leland Stanford Junior University | Magnetic resonance imaging using three-dimensional spectral-spatial excitation |
US5539313A (en) * | 1995-08-04 | 1996-07-23 | Board Of Trustees Of The Leland Stanford Junior University | Full echo spiral-in/spiral-out magnetic resonance imaging |
US6304084B1 (en) * | 1997-04-14 | 2001-10-16 | The Board Of Trustees Of The Leland Stanford Junior University | Method of improved magnetic resonance spectroscopic localization using spectral-spatial pulses |
US5999839A (en) * | 1998-01-30 | 1999-12-07 | General Electric Company | Arterial MRI with chemical-shift nulling |
US6111411A (en) * | 1998-04-07 | 2000-08-29 | Generalelectric Company | RF power calibration for an MRI system using multiple axis projections |
JP4416221B2 (ja) * | 1999-09-28 | 2010-02-17 | 株式会社日立メディコ | 磁気共鳴画像診断装置 |
EP1373919A1 (en) * | 2001-03-23 | 2004-01-02 | Koninklijke Philips Electronics N.V. | Magnetic resonance imaging method for an angulated cut plane |
WO2002084305A2 (en) * | 2001-04-13 | 2002-10-24 | University Of Virginia Patent Foundation | Optimized high-speed magnetic resonance imaging method and system using hyperpolarized noble gases |
US6549799B2 (en) * | 2001-04-18 | 2003-04-15 | Sunnybrook And Women's College Health Sciences Centre | Concurrent MRI of multiple objects |
DE10119660B4 (de) * | 2001-04-20 | 2006-01-05 | Siemens Ag | Verfahren zur schnellen Gewinnung eines Magnetresonanzbildes |
JP3825685B2 (ja) * | 2001-11-22 | 2006-09-27 | 株式会社東芝 | 高周波コイルを使用した磁気共鳴映像装置 |
US6879158B2 (en) * | 2002-05-17 | 2005-04-12 | General Electric Company | Method for accelerating focused excitation with multiple RF transmit coils |
US7034530B2 (en) * | 2002-06-28 | 2006-04-25 | General Electric Company | Technique for simultaneous acquisition of multiple independent MR imaging volumes with optimization of magnetic field homogeneity for spin preparation |
DE10232342A1 (de) * | 2002-07-17 | 2004-01-29 | Philips Intellectual Property & Standards Gmbh | MR-Verfahren mit mehrdimensionalen Hochfrequenzimpulsen |
US6989673B2 (en) * | 2003-11-26 | 2006-01-24 | General Electric Company | Method and apparatus to reduce RF power deposition during MR data acquisition |
US7053618B2 (en) * | 2003-11-26 | 2006-05-30 | General Electric Company | Method and apparatus to generate an RF excitation consistent with a desired excitation profile using a transmit coil array |
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2004
- 2004-12-20 US US11/017,489 patent/US7307419B2/en active Active
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2005
- 2005-12-06 JP JP2005351600A patent/JP5584384B2/ja active Active
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JP2006175223A (ja) | 2006-07-06 |
NL1030695C2 (nl) | 2009-03-09 |
US20060132133A1 (en) | 2006-06-22 |
US7307419B2 (en) | 2007-12-11 |
NL1030695A1 (nl) | 2006-06-21 |
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