IL123224A0 - Method for reducing maxwell term artifacts in fast spin echo mr images - Google Patents
Method for reducing maxwell term artifacts in fast spin echo mr imagesInfo
- Publication number
- IL123224A0 IL123224A0 IL12322498A IL12322498A IL123224A0 IL 123224 A0 IL123224 A0 IL 123224A0 IL 12322498 A IL12322498 A IL 12322498A IL 12322498 A IL12322498 A IL 12322498A IL 123224 A0 IL123224 A0 IL 123224A0
- Authority
- IL
- Israel
- Prior art keywords
- images
- reducing
- spin echo
- fast spin
- maxwell term
- 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
- G01R33/565—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
- G01R33/56581—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 due to Maxwell fields, i.e. concomitant fields
-
- 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
- G01R33/56554—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by acquiring plural, differently encoded echo signals after one RF excitation, e.g. correction for readout gradients of alternating polarity in EPI
Landscapes
- 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)
- High Energy & Nuclear Physics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3759997P | 1997-02-11 | 1997-02-11 | |
US08/831,684 US6008647A (en) | 1997-02-11 | 1997-04-10 | Method for reducing Maxwell term artifacts in fast spin echo MR images |
Publications (1)
Publication Number | Publication Date |
---|---|
IL123224A0 true IL123224A0 (en) | 1998-09-24 |
Family
ID=26714292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IL12322498A IL123224A0 (en) | 1997-02-11 | 1998-02-08 | Method for reducing maxwell term artifacts in fast spin echo mr images |
Country Status (5)
Country | Link |
---|---|
US (1) | US6008647A (xx) |
JP (1) | JP4035219B2 (xx) |
CN (1) | CN1217622C (xx) |
DE (1) | DE19801808B4 (xx) |
IL (1) | IL123224A0 (xx) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6011392A (en) * | 1997-04-10 | 2000-01-04 | General Electric Company | Method for reducing Maxwell term artifacts in fast spin echo MR images |
JP2002519165A (ja) * | 1998-07-02 | 2002-07-02 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | スプリアスの磁気信号が原因による磁気共鳴信号における人工物を減少させる方法 |
JP4503747B2 (ja) * | 1999-12-13 | 2010-07-14 | 株式会社東芝 | 磁気共鳴イメージング装置 |
JP3875479B2 (ja) * | 2000-10-20 | 2007-01-31 | 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 | 磁気共鳴撮影装置 |
FR2838195B1 (fr) * | 2002-04-05 | 2005-03-18 | Ge Med Sys Global Tech Co Llc | Procede d'imagerie rapide par resonnance magnetique nucleaire |
DE102005015069B4 (de) * | 2005-04-01 | 2008-03-27 | Siemens Ag | Verfahren zur Vermeidung linearer Phasenfehler in der Magnetresonanz-Spektroskopie |
JP4249215B2 (ja) * | 2006-10-06 | 2009-04-02 | 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 | 磁気共鳴イメージング装置 |
DE102006059499B4 (de) * | 2006-12-15 | 2009-06-10 | Siemens Ag | Verfahren zur Reduzierung von Wirbelströmen bei einem Magnetresonanzgerät |
JP5022696B2 (ja) * | 2006-12-22 | 2012-09-12 | 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 | 磁気共鳴イメージング装置 |
JP5427565B2 (ja) * | 2009-11-24 | 2014-02-26 | 株式会社日立製作所 | Mri装置用磁場調整 |
CN103185876B (zh) * | 2011-12-30 | 2015-05-13 | 西门子(深圳)磁共振有限公司 | 磁共振成像方法及磁共振成像装置 |
DE102012205587B4 (de) | 2012-04-04 | 2013-12-24 | Siemens Aktiengesellschaft | Schichtspezifische Phasenkorrektur bei Schicht-Multiplexing |
DE102012212983B3 (de) * | 2012-07-24 | 2014-01-23 | Siemens Aktiengesellschaft | Vermeidung von Einfaltungsartefakten bei der Aufnahme von Magnetresonanzdaten |
DE102012219010B4 (de) * | 2012-10-18 | 2014-04-30 | Siemens Aktiengesellschaft | Optimierung einer Pulssequenz für eine Magnetresonanzanlage |
DE102012219016B3 (de) * | 2012-10-18 | 2014-03-27 | Siemens Aktiengesellschaft | Optimierung einer Pulssequenz für eine Magnetresonanzanlage |
KR101442619B1 (ko) * | 2012-11-26 | 2014-09-22 | 삼성전자주식회사 | Mri 시스템 및 mri 시스템 진단 방법 |
US10132889B2 (en) * | 2013-05-22 | 2018-11-20 | General Electric Company | System and method for reducing acoustic noise level in MR imaging |
DE102013227170B3 (de) * | 2013-12-27 | 2015-07-02 | Siemens Aktiengesellschaft | Verfahren und Steuereinrichtung zur Ansteuerung eines Magnetresonanzsystems |
JP6591208B2 (ja) | 2015-06-09 | 2019-10-16 | 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 |
US10705170B1 (en) * | 2019-02-15 | 2020-07-07 | GE Precision Healthcare LLC | Methods and systems for removing spike noise in magnetic resonance imaging |
EP3748386A1 (en) * | 2019-06-03 | 2020-12-09 | Siemens Healthcare GmbH | Minimization of effects of concomitant fields in multi echo magnetic resonance imaging |
CN115616461B (zh) * | 2022-10-17 | 2023-07-07 | 浙江大学 | 一种基于可调回波时间编码的磁共振磁场测量方法及装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4728890A (en) * | 1985-08-16 | 1988-03-01 | Picker International, Inc. | Motion artifact suppression technique of magnetic resonance imaging |
US5270654A (en) * | 1991-07-05 | 1993-12-14 | Feinberg David A | Ultra-fast multi-section MRI using gradient and spin echo (grase) imaging |
US5281916A (en) * | 1992-07-29 | 1994-01-25 | General Electric Company | NMR angiography using fast spin echo pulse sequences |
JP3505294B2 (ja) * | 1995-03-28 | 2004-03-08 | ジーイー横河メディカルシステム株式会社 | Mri装置 |
DE19520203C1 (de) * | 1995-06-01 | 1996-11-21 | Siemens Ag | Verfahren zur Vermeidung von Bildabschattungen bei Kernspintomographiegeräten, die mit Multiechosequenzen betrieben werden |
US5869965A (en) * | 1997-02-07 | 1999-02-09 | General Electric Company | Correction of artifacts caused by Maxwell terms in MR echo-planar images |
US5877629A (en) * | 1997-04-08 | 1999-03-02 | General Electric Company | Correction for maxwell fields produced during non-rectilinear k-space sampling |
-
1997
- 1997-04-10 US US08/831,684 patent/US6008647A/en not_active Expired - Lifetime
-
1998
- 1998-01-19 DE DE19801808A patent/DE19801808B4/de not_active Expired - Lifetime
- 1998-02-08 IL IL12322498A patent/IL123224A0/xx not_active IP Right Cessation
- 1998-02-11 CN CN98104098.5A patent/CN1217622C/zh not_active Expired - Fee Related
- 1998-02-12 JP JP02942898A patent/JP4035219B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP4035219B2 (ja) | 2008-01-16 |
US6008647A (en) | 1999-12-28 |
DE19801808A1 (de) | 1998-08-13 |
CN1217622C (zh) | 2005-09-07 |
JPH10290795A (ja) | 1998-11-04 |
CN1190572A (zh) | 1998-08-19 |
DE19801808B4 (de) | 2009-06-04 |
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Legal Events
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KB | Patent renewed | ||
RH1 | Patent not in force |