JP6480952B2 - 低次高調波パルスシーケンスを用いる低ノイズの磁気共鳴撮像 - Google Patents
低次高調波パルスシーケンスを用いる低ノイズの磁気共鳴撮像 Download PDFInfo
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- G—PHYSICS
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- 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
- G01R33/56572—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of a gradient magnetic field, e.g. non-linearity of a gradient magnetic field
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- 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
- G01R33/34092—RF coils specially adapted for NMR spectrometers
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
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- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/3808—Magnet assemblies for single-sided MR wherein the magnet assembly is located on one side of a subject only; Magnet assemblies for inside-out MR, e.g. for MR in a borehole or in a blood vessel, or magnet assemblies for fringe-field MR
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- G01R33/00—Arrangements or instruments for measuring magnetic variables
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- G01R33/4824—MR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g. centric or segmented coverage of k-space using a non-Cartesian trajectory
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- 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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- 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]
- G01R33/5616—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 gradient refocusing, e.g. EPI
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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
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
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- 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]
- G01R33/5617—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 RF refocusing, e.g. RARE
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Description
12 スキャナ
14 スキャナ制御回路
16、60 システム制御回路
18 記憶装置
20 ハウジング
22 ボア
24 テーブル
26 患者
28 一次磁場コイル
30、32、34 勾配磁場コイル
36 RFコイル
38 受信コイル
40 主電源
42 駆動回路
44、52 制御回路
46 スイッチ
48 受信回路
50、56、58、64 インターフェース回路
54、62 メモリ回路
66 プリンタ
68 モニタ
70 ユーザインターフェース
200 静かな勾配エコー(GRE)パルスシーケンス
206 Gy勾配
210 正弦波形
214 負のローブ
216 正のローブ
220 RFパルス
222 読み出し間隔
232、332 サンプル
300 静かな勾配エコー(GRE)パルスシーケンス
314 第1の(負の)勾配ローブ
316 第1の(正の)勾配ローブ
350 静かな勾配エコー(GRE)パルスシーケンス
400 静かな光速スピンエコーパルスシーケンス
410 平坦な区間
500 パルスシーケンス
510 勾配ゼロ交差
512 位相
600 静かなGREパルスシーケンス
Claims (21)
- 第1の正弦勾配波形(210)を用いて、第1の勾配方向に関連する少なくとも1つの第1の勾配磁場コイル(30)を駆動させ、かつ第2の正弦勾配波形(210)を用いて、第2の勾配方向に関連する第2の勾配磁場コイル(32)を駆動させるステップと、
前記第1の正弦勾配波形(210)、および前記第2の正弦勾配波形(210)が、それぞれの勾配ゼロ線と交差するときに、1つ以上の交差事象でRFパルス(220)を生成するステップと、
前記各RFパルス(220)の後に、それぞれの読み出し信号(222)を取得するステップと、
前記取得された読み出し信号(222)を用いて、画像を生成するステップとを含む、
磁気共鳴撮像システム(10)の勾配磁場コイル(30、32)を駆動させる方法。 - 第3の正弦勾配波形(210)で第3の勾配磁場コイル(34)を駆動させるステップであって、前記第3の正弦勾配波形(210)が、それぞれの勾配ゼロ線と交差するときに、同様に前記RFパルス(220)が生成される、第3の勾配磁場コイル(34)を駆動させるステップをさらに含む、
請求項1に記載の方法。 - 前記第1の正弦勾配波形(210)および前記第2の正弦勾配波形(210)が、前記正弦勾配波形(210)の正の部分(216)と負の部分(214)とに囲まれた各領域が等しくならないように垂直にオフセットされる、請求項1に記載の方法。
- 前記正弦勾配波形(210)の正の部分(216)の前記各領域が、前記正弦勾配波形(210)の前記負の部分(214)の前記各領域の約2倍である、請求項3に記載の方法。
- 前記RFパルス(220)が、各ゼロ交差事象で生成される、請求項1に記載の方法。
- 前記RFパルス(220)が、交互の交差事象で生成される、請求項1に記載の方法。
- 撮像シーケンス中に、前記勾配方向が三次元に螺旋を描く、請求項1に記載の方法。
- 前記読み出し信号(222)が、前記各RFパルス(220)に続いてすぐに取得される、請求項1に記載の方法。
- 前記各読み出し信号が、前記各RFパルス(220)および第1の正弦ローブ(314)に続く第2の正弦ローブ(316)中に取得される、請求項1に記載の方法。
- 前記第1の正弦勾配波形(210)または前記第2の正弦勾配波形(210)のうちの1つまたは両方が、平坦な勾配波形(410)でインターリーブされる、請求項1に記載の方法。
- 前記RFパルス(220)が、前記正弦勾配波形(210)でインターリーブされる前記平坦な勾配波形(410)の間に生成される、請求項10に記載の方法。
- 前記第1の勾配磁場コイル(30)および前記第2の勾配磁場コイル(32)が、前記第1の正弦勾配波形(210)および前記第2の正弦勾配波形(210)をそれぞれ用いて駆動されるときに、約10Hz〜60Hzで動作する、請求項1に記載の方法。
- 繰り返し時間が、約8msよりも長い、請求項1に記載の方法。
- プロセッサ実行可能ルーチンをエンコードする、1つ以上の有形の非一時的な機械可読媒体であって、前記ルーチンは、プロセッサによって実行されると、
第1の正弦勾配波形(210)を用いて、第1の勾配方向に関連する少なくとも1つの第1の勾配磁場コイル(30)を駆動させ、かつ第2の正弦勾配波形(210)を用いて、第2の勾配方向に関連する第2の勾配磁場コイル(32)を駆動させることと、
前記第1の正弦勾配波形(210)および前記第2の正弦勾配波形(210)が、それぞれの勾配ゼロ線と交差するときに、1つ以上の交差事象でRFパルス(220)を生成することと、
前記各RFパルス(220)の後に、それぞれの読み出し信号を取得することと、
前記取得された読み出し信号を用いて、画像を生成することとを含む、
行われるべき動作をもたらす、1つ以上の有形の非一時的な機械可読媒体。 - 前記第1の正弦勾配波形(210)および前記第2の正弦勾配波形(210)が、前記正弦勾配波形(210)の正の部分(216)と負の部分(214)との各領域が等しくならないように、垂直にオフセットされる、請求項14に記載の1つ以上の有形の非一時的な機械可読媒体。
- 前記勾配方向が、撮像シーケンス中に三次元に螺旋を描く、請求項14に記載の1つ以上の有形の非一時的な機械可読媒体。
- 前記第1の正弦勾配波形(210)または前記第2の正弦勾配波形(210)のうちの1つまたは両方が、平坦な勾配波形(410)でインターリーブされる、請求項14に記載の1つ以上の有形の非一時的な機械可読媒体。
- 一次磁場磁石と、
複数の勾配磁場コイル(30、32、34)と、
高周波(RF)送信コイル(36)と、
受信コイルのアレイ(38)と、
前記勾配磁場コイル(30、32、34)、前記RF送信コイル(36)、および前記受信コイルのアレイ(38)に結合される制御回路(44、52、60)とを備え、前記制御回路(44、52、60)は、
第1の正弦勾配波形(210)を用いて、第1の勾配方向に関連する少なくとも1つの第1の勾配磁場コイル(30)を駆動させ、かつ第2の正弦勾配波形(210)を用いて、第2の勾配方向に関連する第2の勾配磁場コイル(32)を駆動させ、
前記第1の正弦勾配波形(210)および前記第2の正弦勾配波形(210)が、それぞれの勾配ゼロ線と交差するときに、1つ以上の交差事象でRFパルス(220)を生成し、
前記各RFパルス(220)の後に、それぞれの読み出し信号(222)を取得し、
前記取得された読み出し信号(222)を用いて、画像を生成するように構成される、
磁気共鳴撮像(MRI)システム(10)。 - 前記第1の正弦勾配波形(210)および前記第2の正弦勾配波形(210)が、前記正弦勾配波形(210)の正の部分(216)と負の部分(214)との各領域が等しくならないように、垂直にオフセットされる、請求項18に記載のMRIシステム(10)。
- 前記勾配方向が、撮像シーケンス中に三次元に螺旋を描く、請求項18に記載のMRIシステム(10)。
- 前記第1の正弦勾配波形(210)または前記第2の正弦勾配波形(210)のうちの1つまたは両方が、平坦な勾配波形(410)でインターリーブされる、請求項18に記載のMRIシステム(10)。
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US14/260,069 | 2014-04-23 | ||
US14/260,069 US9594144B2 (en) | 2014-04-23 | 2014-04-23 | Low-noise magnetic resonance imaging using low harmonic pulse sequences |
PCT/US2015/026102 WO2015164169A1 (en) | 2014-04-23 | 2015-04-16 | Low-noise magnetic resonance imaging using low harmonic pulse sequences |
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DE102014222496B4 (de) * | 2014-11-04 | 2016-07-07 | Siemens Healthcare Gmbh | Magnetresonanz-Bildgebung mit einem musikbasierten Gradientenverlauf |
JP6666348B2 (ja) * | 2014-12-12 | 2020-03-13 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | Mrイメージング方法、mrデバイス及びコンピュータ・プログラム |
WO2016162957A1 (ja) * | 2015-04-07 | 2016-10-13 | 株式会社日立製作所 | 磁気共鳴イメージング装置 |
US10718837B2 (en) * | 2016-04-21 | 2020-07-21 | University Of Virginia Patent Foundation | 3D UTE imaging using variable-TE stack-of-spirals acquisition |
US10353034B2 (en) * | 2016-05-05 | 2019-07-16 | Siemens Healthcare Gmbh | Multi-echo pseudo-golden angle stack of stars thermometry with high spatial and temporal resolution using k-space weighted image contrast |
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US4680545A (en) * | 1985-01-04 | 1987-07-14 | General Electric Company | Method for reduction of acoustical noise generated by magnetic field gradient pulses |
US4695799A (en) | 1985-06-18 | 1987-09-22 | General Electric Company | NMR magnetization inversion by non-linear adiabatic fast passage |
US4727325A (en) * | 1985-10-16 | 1988-02-23 | Hitachi, Ltd. | NMR imaging method |
US4701708A (en) | 1986-08-01 | 1987-10-20 | General Electric Company | Polarization transfer by selective homonuclear technique for suppression of uncoupled spins in NMR spectroscopy |
US4812760A (en) | 1987-07-27 | 1989-03-14 | General Electric Company | Multi-dimensional selective NMR excitation with a single RF pulse |
US4973908A (en) | 1989-06-23 | 1990-11-27 | General Electric Company | NMR probe with multiple isolated coplanar surface coils |
GB8914467D0 (en) * | 1989-06-23 | 1989-08-09 | Nat Res Dev | Nuclear magnetic resonance imaging methods |
US5201311A (en) | 1989-08-11 | 1993-04-13 | General Electric Company | Spatially-localized chemical-reaction-rate NMR spectroscopic imaging |
US4995394A (en) | 1989-08-11 | 1991-02-26 | General Electric Company | Fast NMR cardiac profile imaging |
US5027071A (en) | 1990-03-05 | 1991-06-25 | General Electric Company | Method of, and apparatus for, NMR slice selection |
US5192909A (en) | 1991-01-07 | 1993-03-09 | General Electric Company | Spectroscopic localization using pinwheel nmr excitation pulses |
US5133357A (en) | 1991-02-07 | 1992-07-28 | General Electric Company | Quantitative measurement of blood flow using cylindrically localized fourier velocity encoding |
US5258711A (en) | 1992-04-20 | 1993-11-02 | General Electric Company | NMR selective excitation of bent slices |
US5313163A (en) | 1992-08-12 | 1994-05-17 | General Electric Company | Sampling-ring saturation pulse for two-dimensional magnetic resonance selective excitation |
US5307812A (en) | 1993-03-26 | 1994-05-03 | General Electric Company | Heat surgery system monitored by real-time magnetic resonance profiling |
US5365927A (en) | 1993-11-02 | 1994-11-22 | General Electric Company | Magnetic resonance imaging system with pointing device |
US5514962A (en) | 1994-02-28 | 1996-05-07 | General Electric Company | Oblique MR image controlled from a 3D workstation model |
US5532595A (en) * | 1994-04-18 | 1996-07-02 | Picker International, Inc. | Three-dimensional spiral echo volume imaging |
US5521507A (en) | 1995-02-03 | 1996-05-28 | Advanced Nmr Systems, Inc. | Gradient coil power supply and imaging method |
US5512827A (en) | 1995-06-02 | 1996-04-30 | General Electric Company | Scan control platform-based interactive image plane prescription for MRI |
US5512826A (en) | 1995-06-02 | 1996-04-30 | General Electric Company | Screen-based interactive image-plane prescription for MRI |
US5711300A (en) | 1995-08-16 | 1998-01-27 | General Electric Company | Real time in vivo measurement of temperature changes with NMR imaging |
US5584293A (en) | 1995-08-16 | 1996-12-17 | General Electric Company | Time-line imaging-plane prescription for MRI |
US5548216A (en) | 1995-11-15 | 1996-08-20 | General Electric Company | Methods for the simultaneous detection of multiple magnetic resonance images using phase modulated excitation |
US5578924A (en) | 1995-11-15 | 1996-11-26 | General Electric Company | Methods for the simultaneous detection of multiple magnetic resonance images |
US6078176A (en) | 1996-11-08 | 2000-06-20 | General Electric Company | Fast spin echo pulse sequence for diffusion weighted imaging |
US6011392A (en) * | 1997-04-10 | 2000-01-04 | General Electric Company | Method for reducing Maxwell term artifacts in fast spin echo MR images |
US6043659A (en) | 1997-10-31 | 2000-03-28 | General Electric Company | Magnetic resonance imaging system with non-linear preamplification |
US6008648A (en) | 1997-12-04 | 1999-12-28 | General Electric Company | Method for producing physical gradient waveforms in magnetic resonance imaging |
US5999839A (en) | 1998-01-30 | 1999-12-07 | General Electric Company | Arterial MRI with chemical-shift nulling |
US6141578A (en) | 1998-04-08 | 2000-10-31 | General Electric Company | Method for calculating wave velocities in blood vessels |
US6088488A (en) | 1998-04-17 | 2000-07-11 | General Electric Company | Vascular imaging with adaptive averaging |
US6070095A (en) | 1998-06-02 | 2000-05-30 | General Electric Company | Method for reducing translational motion artifacts in MR imaging |
US6249120B1 (en) | 1998-07-22 | 2001-06-19 | General Electric Company | Modular timemasking sequence programming for imaging system |
US6043656A (en) | 1998-11-23 | 2000-03-28 | General Electric Company | Method for compensating an MRI system for residual magnetization |
US6275035B1 (en) | 1998-11-25 | 2001-08-14 | General Electric Company | Method for using three points to define a 2D MR imaging section |
US6114852A (en) | 1999-01-23 | 2000-09-05 | General Electric Company | Method employing point source to determine motion induced errors in MR imaging |
US6591127B1 (en) | 1999-03-15 | 2003-07-08 | General Electric Company | Integrated multi-modality imaging system and method |
US6211674B1 (en) | 1999-05-14 | 2001-04-03 | General Electric Company | Method and system for providing a maximum intensity projection of a non-planar image |
US6310479B1 (en) | 1999-08-20 | 2001-10-30 | General Electric Company | Magnetic resonance projection imaging of dynamic subjects |
US6239597B1 (en) | 1999-10-14 | 2001-05-29 | General Electric Company | Method and apparatus for rapid T2 weighted MR image acquisition |
US6721589B1 (en) | 1999-11-30 | 2004-04-13 | General Electric Company | Rapid three-dimensional magnetic resonance tagging for studying material deformation and strain |
US6462544B1 (en) | 2000-10-24 | 2002-10-08 | General Electric Company | Magnetic resonance imaging apparatus |
US7209777B2 (en) | 2000-11-30 | 2007-04-24 | General Electric Company | Method and apparatus for automated tracking of non-linear vessel movement using MR imaging |
US6476607B1 (en) * | 2000-12-08 | 2002-11-05 | Koninklijke Philips Electronics N.V. | MRI method and apparatus for rapid acquisition of multiple views through a volume |
US6980846B2 (en) | 2001-03-30 | 2005-12-27 | General Electric Company | Robust coronary MR angiography without respiratory navigation |
US6608479B1 (en) | 2002-05-15 | 2003-08-19 | General Electric Company | Method and system for MRI with lipid suppression |
US7009395B2 (en) | 2002-05-15 | 2006-03-07 | General Electric Company | Method for MRI with steady-state free precession pulse sequences |
US6586933B1 (en) | 2002-05-15 | 2003-07-01 | General Electric Company | Method and system for MRI with lipid suppression |
US6833700B2 (en) | 2002-09-13 | 2004-12-21 | General Electric Company | Method and apparatus for reconstruction of images in parallel MRI systems |
US20040075434A1 (en) | 2002-10-16 | 2004-04-22 | Vavrek Robert Michael | Gradient coil apparatus for magnetic resonance imaging |
US7328054B2 (en) | 2003-04-09 | 2008-02-05 | The Mcw Research Foundation, Inc. | Perfusion magnetic resonance imaging using encoded RF tagging pulses |
US6982552B2 (en) | 2003-05-27 | 2006-01-03 | General Electric Company | Methods and systems for fabricating magnetic resonance gradient coils |
US6876199B2 (en) | 2003-05-30 | 2005-04-05 | General Electric Company | Method and system for accelerated imaging using parallel MRI |
US7282915B2 (en) | 2004-05-14 | 2007-10-16 | General Electric Company | Multi-turn element RF coil array for multiple channel MRI |
US20060074291A1 (en) | 2004-09-30 | 2006-04-06 | General Electric Company | Magnetic resonance imaging system and method |
US7307419B2 (en) | 2004-12-20 | 2007-12-11 | General Electric Company | Method and system for spatial-spectral excitation by parallel RF transmission |
US20060132132A1 (en) | 2004-12-21 | 2006-06-22 | General Electric Company | Method and system for MR scan acceleration using selective excitation and parallel transmission |
US7167000B2 (en) | 2004-12-22 | 2007-01-23 | General Electric Company | Cryogenically cooled radiofrequency coil array for magnetic resonance imaging |
US20060173268A1 (en) | 2005-01-28 | 2006-08-03 | General Electric Company | Methods and systems for controlling acquisition of images |
US7245124B2 (en) * | 2005-04-12 | 2007-07-17 | Mayo Foundation For Medical Education And Research | Under-sampled 3D MRI using a shells k-space sampling trajectory |
US7106062B1 (en) | 2005-05-06 | 2006-09-12 | General Electric Company | Method and system for reducing coupling in magnetic resonance RF coil arrays |
US7161511B2 (en) | 2005-06-03 | 2007-01-09 | General Electric Company | Linearization system and method |
US7135864B1 (en) | 2005-07-20 | 2006-11-14 | General Electric Company | System and method of elliptically driving an MRI Coil |
JP5179182B2 (ja) * | 2005-07-27 | 2013-04-10 | 株式会社日立メディコ | 磁気共鳴イメージング装置 |
DE102006017049B3 (de) | 2006-04-11 | 2008-02-14 | Siemens Ag | Verfahren zur Aufnahme von Magnet-Resonanz-Bilddaten und Magnet-Resonanz-Gerät |
US7279893B1 (en) | 2006-04-20 | 2007-10-09 | General Electric Company | Receiver channel data combining in parallel mr imaging |
US7498813B2 (en) | 2006-05-04 | 2009-03-03 | General Electric Company | Multi-channel low loss MRI coil |
US7365542B1 (en) | 2006-10-31 | 2008-04-29 | General Electric Company | Flexible RF coil assembly and method of making same |
US7525313B2 (en) | 2007-05-04 | 2009-04-28 | General Electric Company | System and method for multi-channel MR transmission |
US8274286B2 (en) | 2008-01-18 | 2012-09-25 | General Electric Company | System and method for multi-spectral MR imaging near metal |
US7977943B2 (en) | 2008-04-10 | 2011-07-12 | General Electric Company | Method and system for reconstructing images |
US7782058B2 (en) | 2008-04-28 | 2010-08-24 | General Electric Company | System and method for accelerated MR imaging |
US7612564B1 (en) | 2008-04-30 | 2009-11-03 | General Electric Company | Tiled receiver coil array with improved spatial coverage |
JP5337406B2 (ja) | 2008-05-23 | 2013-11-06 | 株式会社日立メディコ | 磁気共鳴イメージング装置 |
US7746074B2 (en) | 2008-06-24 | 2010-06-29 | General Electric Company | System and apparatus for reducing high field shading in MR imaging |
US8165377B2 (en) | 2008-11-26 | 2012-04-24 | General Electric Company | System and method for determining a cardiac axis |
US8160342B2 (en) | 2009-02-27 | 2012-04-17 | General Electric Company | System and method for processing data signals |
US8143893B2 (en) | 2009-03-31 | 2012-03-27 | General Electric Company | Thin extended-cavity RF coil for MRI |
US8102177B2 (en) | 2009-03-31 | 2012-01-24 | General Electric Company | Using S-parameter measurements to manage SAR and transmit gain in MRI |
US7994788B2 (en) | 2009-04-03 | 2011-08-09 | General Electric Company | Short hybrid microstrip magnetic resonance coils |
US8063637B2 (en) | 2009-04-16 | 2011-11-22 | General Electric Company | System and method for phase relaxed RF pulse design |
US8768095B2 (en) | 2009-08-14 | 2014-07-01 | General Electric Company | System and method for processing data signals |
US8217651B2 (en) | 2009-10-30 | 2012-07-10 | General Electric Company | Amplified radiation damping for MR imaging and spectroscopy |
US8559688B2 (en) | 2010-06-30 | 2013-10-15 | General Electric Company | System and method for processing data signals |
US20120146646A1 (en) | 2010-12-09 | 2012-06-14 | General Electric Company | Nanophotonic system for optical data and power transmission in medical imaging systems |
US20120161768A1 (en) | 2010-12-23 | 2012-06-28 | General Electric Company | System and method for communicating data |
US8823378B2 (en) | 2010-12-23 | 2014-09-02 | General Electric Company | System and method for inductively communicating data |
US20120169341A1 (en) | 2010-12-29 | 2012-07-05 | General Electric Company | Integrated gamma ray detector ring and rf body coil |
US8922210B2 (en) | 2011-03-31 | 2014-12-30 | General Electric Company | Method and apparatus for performing diffusion spectrum imaging |
CN103597370B (zh) * | 2011-04-21 | 2016-01-06 | 马普协会 | 空间编码的相位对比磁共振成像 |
US9255979B2 (en) | 2012-04-11 | 2016-02-09 | General Electric Company | Measuring diffusional anisotropy of ODF lobes having maxima peaks and minima troughs with diffusion weighted MRI |
US8868153B2 (en) | 2012-04-19 | 2014-10-21 | General Electric Company | Image correction using multichannel blind deconvolution with homomorphic filtering |
US9250305B2 (en) | 2012-05-31 | 2016-02-02 | General Electric Company | Adaptable sheet of coils |
US9453894B2 (en) | 2012-05-31 | 2016-09-27 | General Electric Company | Sheet of surface coils for imaging applications |
US9554707B2 (en) | 2012-06-29 | 2017-01-31 | General Electric Company | Concurrent acquisition of PET fields during acquisition of a MRI field of view |
US8942445B2 (en) | 2012-09-14 | 2015-01-27 | General Electric Company | Method and system for correction of lung density variation in positron emission tomography using magnetic resonance imaging |
US9513352B2 (en) | 2012-09-28 | 2016-12-06 | General Electric Company | System and method for inductively communicating data |
US9594144B2 (en) * | 2014-04-23 | 2017-03-14 | General Electric Company | Low-noise magnetic resonance imaging using low harmonic pulse sequences |
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