DE69416765D1 - Apparat zur Bilderzeugung mittels magnetischer Resonanz - Google Patents
Apparat zur Bilderzeugung mittels magnetischer ResonanzInfo
- Publication number
- DE69416765D1 DE69416765D1 DE69416765T DE69416765T DE69416765D1 DE 69416765 D1 DE69416765 D1 DE 69416765D1 DE 69416765 T DE69416765 T DE 69416765T DE 69416765 T DE69416765 T DE 69416765T DE 69416765 D1 DE69416765 D1 DE 69416765D1
- Authority
- DE
- Germany
- Prior art keywords
- magnetic resonance
- imaging apparatus
- resonance imaging
- magnetic
- resonance
- 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 - Fee Related
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
- G01R33/56554—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
-
- 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
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
- G01R33/3607—RF waveform generators, e.g. frequency generators, amplitude-, frequency- or phase modulators or shifters, pulse programmers, digital to analog converters for the RF signal, means for filtering or attenuating of the RF signal
-
- 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
-
- 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
-
- 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
- G01R33/5615—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]
-
- 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
- G01R33/5615—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
Landscapes
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5269889A JP2755125B2 (ja) | 1993-09-30 | 1993-09-30 | Mrイメージング装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69416765D1 true DE69416765D1 (de) | 1999-04-08 |
DE69416765T2 DE69416765T2 (de) | 1999-07-01 |
Family
ID=17478632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69416765T Expired - Fee Related DE69416765T2 (de) | 1993-09-30 | 1994-09-06 | Apparat zur Bilderzeugung mittels magnetischer Resonanz |
Country Status (6)
Country | Link |
---|---|
US (1) | US5548215A (de) |
EP (1) | EP0646807B1 (de) |
JP (1) | JP2755125B2 (de) |
KR (1) | KR100335833B1 (de) |
CN (1) | CN1104883A (de) |
DE (1) | DE69416765T2 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE10032345C2 (de) * | 2000-07-04 | 2002-05-29 | Bruker Medical Gmbh | Verfahren zum Korrigieren von Störeinflüssen auf die MR-Signale einer im Messvolumen einer MR-Apparatur angeordneten Substanz sowie MR-Apparatur zur Durchführung des Verfahrens und Rechnereinheit |
JP4319035B2 (ja) * | 2001-10-30 | 2009-08-26 | 株式会社日立メディコ | 磁気共鳴イメージング装置 |
US7030611B2 (en) * | 2002-12-27 | 2006-04-18 | Kabushiki Kaisha Toshiba | Magnetic resonance imaging apparatus and method incorporating multi-mode gradient coil unit |
CN100510770C (zh) * | 2002-12-27 | 2009-07-08 | 株式会社东芝 | 倾斜磁场线圈装置和磁共振图象装置 |
DE10326174B4 (de) * | 2003-06-10 | 2008-11-27 | Siemens Ag | Verfahren zur Verhinderung des Doppeldeutigkeitsartefaktes in der Magnetresonanz-Tomographie-Bildgebung |
US6882148B2 (en) * | 2003-07-09 | 2005-04-19 | Catholic Healthcare West | Split-blade data collection for propeller MRI |
CN101109791B (zh) * | 2006-07-19 | 2010-09-29 | 西门子(中国)有限公司 | 回波平面成像序列的纠正方法 |
DE102006043809A1 (de) * | 2006-09-13 | 2008-03-27 | Endress + Hauser Gmbh + Co. Kg | Vorrichtung zur Bestimmung und/oder Überwachung einer Prozessgröße |
JP5348870B2 (ja) * | 2006-11-24 | 2013-11-20 | 株式会社東芝 | Mri装置 |
CN101345534B (zh) * | 2008-06-30 | 2012-06-27 | 东软飞利浦医疗设备***有限责任公司 | 一种mri射频信号的产生、发送装置及方法 |
US9622715B2 (en) | 2011-01-26 | 2017-04-18 | Koninklijke Philips N.V. | Clinical ambient control system |
CN102890255B (zh) * | 2012-10-19 | 2015-07-29 | 浙江大学 | 一种用于缩短回波时间的由内而外平面回波成像方法 |
DE112014007064T5 (de) * | 2014-10-17 | 2017-06-29 | Synaptive Medical (Barbados) Inc. | System und Verfahren für die Konnektivitätszuordnung |
DE102015223658B4 (de) * | 2015-11-30 | 2017-08-17 | Siemens Healthcare Gmbh | Verfahren zum Erfassen von Magnetresonanz-Signalen eines Untersuchungsobjekts |
CN112986399B (zh) * | 2021-03-15 | 2022-06-28 | 南昌航空大学 | 一种电磁超声sh导波换能器及在线检测***、方法 |
CN112986398B (zh) * | 2021-03-15 | 2022-06-28 | 南昌航空大学 | 一种电磁超声Lamb波换能器及在线检测***、方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4649345A (en) * | 1984-08-17 | 1987-03-10 | Mitsubishi Denki Kabushiki Kaisha | NMR imaging method |
US4684891A (en) * | 1985-07-31 | 1987-08-04 | The Regents Of The University Of California | Rapid magnetic resonance imaging using multiple phase encoded spin echoes in each of plural measurement cycles |
JPH03292934A (ja) * | 1990-04-09 | 1991-12-24 | Hitachi Medical Corp | 核磁気共鳴を用いた検査方法 |
US5270654A (en) * | 1991-07-05 | 1993-12-14 | Feinberg David A | Ultra-fast multi-section MRI using gradient and spin echo (grase) imaging |
EP0572074B1 (de) * | 1992-05-27 | 1998-10-21 | Koninklijke Philips Electronics N.V. | Verfahren und Gerät zur Bilderzeugung mittels magnetischer Resonanz |
EP0577188B1 (de) * | 1992-06-29 | 1999-09-01 | Koninklijke Philips Electronics N.V. | Verfahren und Gerät zur Kernresonanzabbildung |
JP2677148B2 (ja) * | 1992-11-30 | 1997-11-17 | 株式会社島津製作所 | Mrイメージング装置 |
US5422576A (en) * | 1993-07-13 | 1995-06-06 | Wisconsin Alumni Research Foundation | Magnetic resonance angiography using fast spin echo pulse sequence |
-
1993
- 1993-09-30 JP JP5269889A patent/JP2755125B2/ja not_active Expired - Fee Related
-
1994
- 1994-09-02 US US08/299,119 patent/US5548215A/en not_active Expired - Fee Related
- 1994-09-06 EP EP94113937A patent/EP0646807B1/de not_active Expired - Lifetime
- 1994-09-06 DE DE69416765T patent/DE69416765T2/de not_active Expired - Fee Related
- 1994-09-12 KR KR1019940022896A patent/KR100335833B1/ko not_active IP Right Cessation
- 1994-09-30 CN CN94116703A patent/CN1104883A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
US5548215A (en) | 1996-08-20 |
EP0646807A1 (de) | 1995-04-05 |
KR100335833B1 (ko) | 2002-09-04 |
JPH0795970A (ja) | 1995-04-11 |
JP2755125B2 (ja) | 1998-05-20 |
CN1104883A (zh) | 1995-07-12 |
EP0646807B1 (de) | 1999-03-03 |
KR950007800A (ko) | 1995-04-15 |
DE69416765T2 (de) | 1999-07-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |