IL86231A - Correction for eddy current caused phase degradation - Google Patents
Correction for eddy current caused phase degradationInfo
- Publication number
- IL86231A IL86231A IL86231A IL8623188A IL86231A IL 86231 A IL86231 A IL 86231A IL 86231 A IL86231 A IL 86231A IL 8623188 A IL8623188 A IL 8623188A IL 86231 A IL86231 A IL 86231A
- Authority
- IL
- Israel
- Prior art keywords
- correction
- eddy current
- current caused
- caused phase
- phase degradation
- Prior art date
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
- G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
- G01R33/56308—Characterization of motion or flow; Dynamic imaging
-
- 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
- G01R33/54—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
- G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
- G01R33/56308—Characterization of motion or flow; Dynamic imaging
- G01R33/56316—Characterization of motion or flow; Dynamic imaging involving phase contrast techniques
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Radiology & Medical Imaging (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- High Energy & Nuclear Physics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Vascular Medicine (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL86231A IL86231A (en) | 1988-04-29 | 1988-04-29 | Correction for eddy current caused phase degradation |
DE3912816A DE3912816A1 (de) | 1988-04-29 | 1989-04-19 | Korrektur von durch wirbelstroeme verursachten phasenherabsetzungen |
NL8901068A NL8901068A (nl) | 1988-04-29 | 1989-04-27 | Correctie voor door wervelstroom veroorzaakte fasedegradatie. |
FR898905604A FR2630825B1 (fr) | 1988-04-29 | 1989-04-27 | Procede et dispositif pour la correction d'une degradation de phase provoquee par des courants parasites |
JP1111898A JP2773840B2 (ja) | 1988-04-29 | 1989-04-28 | 渦電流起因位相歪修正システム |
US07/344,806 US4954779A (en) | 1988-04-29 | 1989-04-28 | Correction for eddy current caused phase degradation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL86231A IL86231A (en) | 1988-04-29 | 1988-04-29 | Correction for eddy current caused phase degradation |
Publications (2)
Publication Number | Publication Date |
---|---|
IL86231A0 IL86231A0 (en) | 1988-11-15 |
IL86231A true IL86231A (en) | 1991-07-18 |
Family
ID=11058791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL86231A IL86231A (en) | 1988-04-29 | 1988-04-29 | Correction for eddy current caused phase degradation |
Country Status (6)
Country | Link |
---|---|
US (1) | US4954779A (ja) |
JP (1) | JP2773840B2 (ja) |
DE (1) | DE3912816A1 (ja) |
FR (1) | FR2630825B1 (ja) |
IL (1) | IL86231A (ja) |
NL (1) | NL8901068A (ja) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5027071A (en) * | 1990-03-05 | 1991-06-25 | General Electric Company | Method of, and apparatus for, NMR slice selection |
US5257625A (en) * | 1990-11-26 | 1993-11-02 | Board Of Trustees Of The Leland Stanford Junior University | Method of noninvasive motion analysis by using forced closure of phase contrast MRI maps of velocity |
US5226418A (en) * | 1991-08-01 | 1993-07-13 | General Electric Company | Phase correction of complex - difference processed magnetic resonance angiograms |
US5522390A (en) * | 1991-11-21 | 1996-06-04 | U.S. Philips Corporation | Magnetic resonance imaging method |
US5521502A (en) * | 1994-04-25 | 1996-05-28 | Georgia Tech Research Corporation | Flow differentiation scheme for magnetic resonance angiography |
DE19647537A1 (de) * | 1996-11-16 | 1998-05-20 | Philips Patentverwaltung | MR-Verfahren zur Reduzierung von Bewegungsartefakten und Anordnung zur Durchführung des Verfahrens |
US5923168A (en) * | 1997-06-17 | 1999-07-13 | General Electric Company | Correction of artifacts caused by Maxwell terms in slice offset echo planar imaging |
DE19834698C2 (de) | 1997-08-19 | 2001-06-21 | Siemens Ag | Diffusionserfassung mittels magnetischer Resonanz |
DE19749941A1 (de) * | 1997-11-11 | 1998-08-20 | Siemens Ag | Bildverschiebungskorrektur bei diffusionsgewichteten Pulssequenzen |
US6552542B1 (en) | 2001-09-28 | 2003-04-22 | The Board Of Trustees Of The Leland Stanford Junior University | Oscillating dual-equilibrium steady state angiography using magnetic resonance imaging |
US6815952B1 (en) * | 2003-05-12 | 2004-11-09 | The University Of Queensland | Magnetic resonance diffusion imaging with eddy-current compensation |
US7292032B1 (en) * | 2004-09-28 | 2007-11-06 | General Electric Company | Method and system of enhanced phase suppression for phase-contrast MR imaging |
DE102009058510B4 (de) * | 2009-12-16 | 2012-03-08 | Siemens Aktiengesellschaft | Verfahren zur Bestimmung einer Hintergrundphase in Phasenbilddatensätzen |
JP2013070765A (ja) * | 2011-09-27 | 2013-04-22 | Toshiba Corp | 磁気共鳴イメージング装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4595879A (en) * | 1983-11-14 | 1986-06-17 | Technicare Corporation | Nuclear magnetic resonance flow imaging |
JPH07108288B2 (ja) * | 1985-02-15 | 1995-11-22 | 株式会社日立製作所 | Nmrイメ−ジング方法 |
US4689560A (en) * | 1985-08-16 | 1987-08-25 | Picker International, Inc. | Low R.F. dosage magnetic resonance imaging of high velocity flows |
US4683431A (en) * | 1985-08-16 | 1987-07-28 | Picker International, Inc. | Magnetic resonance imaging of high velocity flows |
NL8602019A (nl) * | 1986-08-07 | 1988-03-01 | Philips Nv | Magnetische resonantiewerkwijze en -inrichting voor het elimineren van fasefouten in beeldelementen van een complexe afbeelding van een kernmagnetisatieverdeling. |
NL8701642A (nl) * | 1987-07-13 | 1989-02-01 | Philips Nv | Werkwijze en inrichting voor het uitvoeren van een fasecorrectie bij mr angiografie. |
-
1988
- 1988-04-29 IL IL86231A patent/IL86231A/xx unknown
-
1989
- 1989-04-19 DE DE3912816A patent/DE3912816A1/de not_active Withdrawn
- 1989-04-27 FR FR898905604A patent/FR2630825B1/fr not_active Expired - Lifetime
- 1989-04-27 NL NL8901068A patent/NL8901068A/nl not_active Application Discontinuation
- 1989-04-28 US US07/344,806 patent/US4954779A/en not_active Expired - Lifetime
- 1989-04-28 JP JP1111898A patent/JP2773840B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
IL86231A0 (en) | 1988-11-15 |
JPH0213435A (ja) | 1990-01-17 |
US4954779A (en) | 1990-09-04 |
DE3912816A1 (de) | 1989-11-09 |
JP2773840B2 (ja) | 1998-07-09 |
FR2630825A1 (fr) | 1989-11-03 |
FR2630825B1 (fr) | 1992-10-02 |
NL8901068A (nl) | 1989-11-16 |
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