DE68923988D1 - Bilderzeugung mittels magnetischer Resonanz mit Kompensation der unechten Frequenz-/Phasenverschiebungen infolge unerwünschte Magnetfeldänderungen während des Messverfahrens zur Bestimmung der magnetischen Kernresonanz-Daten. - Google Patents
Bilderzeugung mittels magnetischer Resonanz mit Kompensation der unechten Frequenz-/Phasenverschiebungen infolge unerwünschte Magnetfeldänderungen während des Messverfahrens zur Bestimmung der magnetischen Kernresonanz-Daten.Info
- Publication number
- DE68923988D1 DE68923988D1 DE68923988T DE68923988T DE68923988D1 DE 68923988 D1 DE68923988 D1 DE 68923988D1 DE 68923988 T DE68923988 T DE 68923988T DE 68923988 T DE68923988 T DE 68923988T DE 68923988 D1 DE68923988 D1 DE 68923988D1
- Authority
- DE
- Germany
- Prior art keywords
- nmr
- magnetic resonance
- magnetic field
- spurious
- compensation
- 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 - Lifetime
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
- G01R33/56563—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
-
- 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
- G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
- G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency
Landscapes
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General 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)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/181,440 US4885542A (en) | 1988-04-14 | 1988-04-14 | MRI compensated for spurious NMR frequency/phase shifts caused by spurious changes in magnetic fields during NMR data measurement processes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE68923988D1 true DE68923988D1 (de) | 1995-10-05 |
Family
ID=22664291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68923988T Expired - Lifetime DE68923988D1 (de) | 1988-04-14 | 1989-01-10 | Bilderzeugung mittels magnetischer Resonanz mit Kompensation der unechten Frequenz-/Phasenverschiebungen infolge unerwünschte Magnetfeldänderungen während des Messverfahrens zur Bestimmung der magnetischen Kernresonanz-Daten. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4885542A (de) |
EP (1) | EP0337588B1 (de) |
JP (1) | JPH0213434A (de) |
AT (1) | ATE127235T1 (de) |
DE (1) | DE68923988D1 (de) |
Families Citing this family (66)
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JPH02159252A (ja) * | 1988-12-14 | 1990-06-19 | Hitachi Ltd | 磁気共鳴イメージング装置における画像再構成方法 |
US4970457A (en) * | 1989-04-05 | 1990-11-13 | The Regents Of The University Of California | MRI compensated for spurious rapid variations in static magnetic field during a single MRI sequence |
DE4005675C2 (de) * | 1990-02-22 | 1995-06-29 | Siemens Ag | Verfahren zur Unterdrückung von Artefakten bei der Bilderzeugung mittels kernmagnetischer Resonanz |
GB9006320D0 (en) * | 1990-03-21 | 1990-05-16 | Gen Electric Co Plc | Nuclear magnetic resonance apparatus |
US5151656A (en) * | 1990-12-11 | 1992-09-29 | General Electric Company | Correction of nmr data acquired by an echo-planar technique |
US5245286A (en) * | 1991-04-18 | 1993-09-14 | The Regents Of The University Of California | Apparatus and method for stabilizing the background magnetic field during mri |
DE69211806T2 (de) * | 1991-10-25 | 1996-10-31 | Univ Queensland | Korrektur von Signalverzerrungen in einem magnetischen Kernresonanzapparat |
US5227728A (en) * | 1991-11-01 | 1993-07-13 | The Regents Of The University Of California | Gradient driver control in magnetic resonance imaging |
US5250901A (en) * | 1991-11-07 | 1993-10-05 | The Regents Of The University Of California | Open architecture iron core electromagnet for MRI using superconductive winding |
DE4203036C2 (de) * | 1992-02-04 | 1994-04-14 | Bruker Medizintech | Verfahren zur Erzeugung eines seitenbandfreien NMR-Spektrums |
US5442290A (en) * | 1992-08-04 | 1995-08-15 | The Regents Of The University Of California | MRI gradient drive current control using all digital controller |
GB9217718D0 (en) * | 1992-08-20 | 1992-09-30 | British Tech Group | Method of and apparatus for nmr testing |
US5309102A (en) * | 1993-05-07 | 1994-05-03 | General Electric Company | Frequency calibration for MRI scanner |
US5483158A (en) * | 1993-10-21 | 1996-01-09 | The Regents Of The University Of California | Method and apparatus for tuning MRI RF coils |
US5510713A (en) * | 1995-06-30 | 1996-04-23 | General Electric Company | Technique for selective fat saturation in MR imaging |
US5652514A (en) * | 1996-03-25 | 1997-07-29 | Toshiba America Mri, Inc. | Correction for field variation in steady-state MRI by repeated acquisition of zero k-space line |
US5869965A (en) * | 1997-02-07 | 1999-02-09 | General Electric Company | Correction of artifacts caused by Maxwell terms in MR echo-planar images |
JP3679892B2 (ja) * | 1997-04-10 | 2005-08-03 | 株式会社東芝 | 磁気共鳴イメージング装置 |
US5891032A (en) * | 1997-04-10 | 1999-04-06 | Elscint Ltd | Fat free TOF angiography |
US6114853A (en) * | 1997-06-25 | 2000-09-05 | Toshiba America Mri, Inc. | NMR methods for qualification of sequence-induced B0 oscillation and correction of the resultant image artifacts in MRI |
US5917323A (en) * | 1997-07-01 | 1999-06-29 | General Electric Company | Correction of axial image signal fall off caused by Maxwell terms |
US6043657A (en) * | 1997-09-18 | 2000-03-28 | General Electric Company | Calibration of RF pulses for MRI |
US6380738B1 (en) * | 1999-11-15 | 2002-04-30 | Ge Medical Systems Global Technology Company, Llc | Method and apparatus for reducing image artifacts caused by magnet vibration in an MR imaging system |
EP1102081B1 (de) * | 1999-11-15 | 2007-08-01 | General Electric Company | Verfahren und Gerät zur Kompensation von Bildartefakten, die durch Vibration des Magneten in einem System der bildgebenden magnetischen Resonanz verursacht werden |
US6448773B1 (en) | 2000-02-24 | 2002-09-10 | Toshiba America Mri, Inc. | Method and system for measuring and compensating for eddy currents induced during NMR imaging operations |
JP3513076B2 (ja) * | 2000-04-07 | 2004-03-31 | 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 |
US6507190B1 (en) * | 2000-08-01 | 2003-01-14 | Ge Medical Systems Global Technologies Company Llc | Method and apparatus for compensating polarizing fields in magnetic resonance imaging |
JP4071430B2 (ja) * | 2000-09-26 | 2008-04-02 | 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 | 磁気共鳴撮影装置 |
JP2002102200A (ja) * | 2000-09-26 | 2002-04-09 | Ge Medical Systems Global Technology Co Llc | 磁気共鳴信号獲得方法および装置、記録媒体並びに磁気共鳴撮影装置 |
JP2002159463A (ja) * | 2000-11-15 | 2002-06-04 | Ge Medical Systems Global Technology Co Llc | Mri装置の磁界変動測定方法、磁界変動補償方法およびmri装置 |
GB2374672A (en) * | 2001-04-20 | 2002-10-23 | Marconi Medical Systems Uk Ltd | Magnetic Resonance Imaging |
US7359745B2 (en) | 2002-05-15 | 2008-04-15 | Case Western Reserve University | Method to correct magnetic field/phase variations in proton resonance frequency shift thermometry in magnetic resonance imaging |
EP1646886A1 (de) * | 2003-07-07 | 2006-04-19 | Koninklijke Philips Electronics N.V. | Verfahren zur überwachung eines magnetfelddriftens einer magnetresonanzabbildungsvorrichtung |
US6995559B2 (en) * | 2003-10-30 | 2006-02-07 | Ge Medical Systems Global Technology Company, Llc | Method and system for optimized pre-saturation in MR with corrected transmitter frequency of pre-pulses |
US7112964B2 (en) * | 2004-08-02 | 2006-09-26 | General Electric Company | Eddy current measurement and correction in magnetic resonance imaging systems with a static phantom |
JP2007325728A (ja) * | 2006-06-07 | 2007-12-20 | Ge Medical Systems Global Technology Co Llc | フェイズサイクリング法及び磁気共鳴イメージング装置 |
JP4808254B2 (ja) * | 2006-07-07 | 2011-11-02 | 株式会社日立メディコ | 磁気共鳴撮影装置 |
US7888935B1 (en) * | 2007-02-23 | 2011-02-15 | University Of Virginia Patent Foundation | K-space trajectory estimation in spiral MRI system and related method thereof |
JP5366437B2 (ja) * | 2007-05-31 | 2013-12-11 | 株式会社東芝 | 磁気共鳴イメージング装置 |
JP5177379B2 (ja) * | 2008-01-07 | 2013-04-03 | 株式会社日立メディコ | 磁気共鳴イメージング装置 |
US7847545B2 (en) | 2008-04-11 | 2010-12-07 | General Electric Company | System and method for correcting flow velocity measurements in phase contrast imaging using magnetic field monitoring |
US8405392B2 (en) * | 2008-12-19 | 2013-03-26 | Sloan Kettering Institute For Cancer Research | Corrected nuclear magnetic resonance imaging using magnetization transfer |
US8334694B2 (en) * | 2009-01-20 | 2012-12-18 | Mayo Foundation For Medical Education And Research | System and method for embedded self-calibration within an inversion recovery pulse sequence |
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 |
DE102009014924B3 (de) * | 2009-03-25 | 2010-09-16 | Bruker Biospin Mri Gmbh | Rekonstruktion von Spektral- oder Bilddateien bei simultaner Anregung und Detektion in der Magnetischen Resonanz |
US10274263B2 (en) | 2009-04-09 | 2019-04-30 | General Electric Company | Method and apparatus for improved cooling of a heat sink using a synthetic jet |
US9615482B2 (en) | 2009-12-11 | 2017-04-04 | General Electric Company | Shaped heat sinks to optimize flow |
CN101963657B (zh) * | 2009-07-24 | 2012-12-05 | 西门子(深圳)磁共振有限公司 | 边带抑制方法和边带抑制装置 |
US8405396B2 (en) * | 2009-09-30 | 2013-03-26 | International Business Machines Corporation | Implantable or insertable nuclear magnetic resonant imaging system |
WO2011063840A1 (en) | 2009-11-26 | 2011-06-03 | Brainlab Ag | Shift compensation in medical image processing |
JP5835989B2 (ja) * | 2010-08-11 | 2015-12-24 | 株式会社東芝 | 磁気共鳴イメージング装置および磁気共鳴イメージング方法 |
DE102011082266B4 (de) * | 2011-09-07 | 2015-08-27 | Siemens Aktiengesellschaft | Abbilden eines Teilbereichs am Rand des Gesichtsfeldes eines Untersuchungsobjekts in einer Magnetresonanzanlage |
CN102866369B (zh) * | 2011-12-12 | 2014-12-24 | 中国科学院深圳先进技术研究院 | 磁共振的主磁场漂移矫正方法和系统 |
CN102846319B (zh) * | 2011-12-12 | 2014-04-16 | 中国科学院深圳先进技术研究院 | 基于磁共振的脑功能成像扫描方法和系统 |
US9322892B2 (en) | 2011-12-20 | 2016-04-26 | General Electric Company | System for magnetic field distortion compensation and method of making same |
US9279871B2 (en) | 2011-12-20 | 2016-03-08 | General Electric Company | System and apparatus for compensating for magnetic field distortion in an MRI system |
GB2521789B (en) | 2012-10-02 | 2020-02-26 | Koninklijke Philips Nv | Metal resistant MR imaging reference scan |
US9274188B2 (en) | 2012-11-30 | 2016-03-01 | General Electric Company | System and apparatus for compensating for magnetic field distortion in an MRI system |
BR112015024494A2 (pt) * | 2013-03-29 | 2017-07-18 | Koninklijke Philips Nv | sistema de imageamento por ressonância magnética irm; método para operação de um sistema de imageamento por ressonância magnética; e produto de programa de computador |
JP6510272B2 (ja) * | 2014-03-07 | 2019-05-08 | 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 |
DE102014205733B4 (de) * | 2014-03-27 | 2016-09-15 | Siemens Healthcare Gmbh | Verfahren zur Ermittlung eines Gradientenkorrekturwertes und Magnetresonanzanlage |
JP6674958B2 (ja) * | 2014-11-11 | 2020-04-01 | ハイパーファイン リサーチ,インコーポレイテッド | 低磁場磁気共鳴のためのパルス・シーケンス |
US10459059B2 (en) | 2015-06-26 | 2019-10-29 | Koninklijke Philips N.V. | Phase corrected Dixon Magnetic Resonance Imaging |
TW202012951A (zh) | 2018-07-31 | 2020-04-01 | 美商超精細研究股份有限公司 | 低場漫射加權成像 |
US11510588B2 (en) | 2019-11-27 | 2022-11-29 | Hyperfine Operations, Inc. | Techniques for noise suppression in an environment of a magnetic resonance imaging system |
DE102021203268A1 (de) * | 2021-03-31 | 2022-10-06 | Siemens Healthcare Gmbh | Verfahren zur Reduktion von Störsignalen |
Family Cites Families (12)
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JPS5934137A (ja) * | 1982-08-19 | 1984-02-24 | Shimadzu Corp | 核磁気共鳴映像法 |
JPS59202050A (ja) * | 1983-04-30 | 1984-11-15 | Toshiba Corp | 核磁気共鳴映像装置 |
JPS59200947A (ja) * | 1983-04-30 | 1984-11-14 | Toshiba Corp | Mri装置における静磁場強度調整方法 |
JPS60193448A (ja) * | 1984-03-15 | 1985-10-01 | 三菱電機株式会社 | 核磁気共鳴断層像撮像装置 |
JPS60222044A (ja) * | 1984-04-20 | 1985-11-06 | 横河電機株式会社 | 核磁気共鳴による診断方法および装置 |
JPS60236637A (ja) * | 1984-05-11 | 1985-11-25 | 横河電機株式会社 | 核磁気共鳴による診断装置 |
JPS61194399A (ja) * | 1985-02-22 | 1986-08-28 | 日新ハイボルテ−ジ株式会社 | 電子線照射装置 |
US4703275A (en) * | 1985-07-25 | 1987-10-27 | Picker International, Inc. | Method and apparatus to compensate for eddy currents in magnetic resonance imaging |
US4761612A (en) * | 1985-07-25 | 1988-08-02 | Picker International, Inc. | Programmable eddy current correction |
US4740753A (en) * | 1986-01-03 | 1988-04-26 | General Electric Company | Magnet shimming using information derived from chemical shift imaging |
US4698591A (en) * | 1986-01-03 | 1987-10-06 | General Electric Company | Method for magnetic field gradient eddy current compensation |
JPS63109849A (ja) * | 1986-10-29 | 1988-05-14 | 株式会社日立メディコ | Nmrイメ−ジング装置 |
-
1988
- 1988-04-14 US US07/181,440 patent/US4885542A/en not_active Expired - Lifetime
-
1989
- 1989-01-10 DE DE68923988T patent/DE68923988D1/de not_active Expired - Lifetime
- 1989-01-10 AT AT89300168T patent/ATE127235T1/de not_active IP Right Cessation
- 1989-01-10 EP EP89300168A patent/EP0337588B1/de not_active Expired - Lifetime
- 1989-04-14 JP JP1095064A patent/JPH0213434A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
EP0337588B1 (de) | 1995-08-30 |
EP0337588A2 (de) | 1989-10-18 |
JPH0213434A (ja) | 1990-01-17 |
US4885542A (en) | 1989-12-05 |
EP0337588A3 (en) | 1990-12-12 |
ATE127235T1 (de) | 1995-09-15 |
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Legal Events
Date | Code | Title | Description |
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8332 | No legal effect for de |