FI844472L - Nmr-foerestaellningssystem, i vilket anvaends faeltkompensation. - Google Patents
Nmr-foerestaellningssystem, i vilket anvaends faeltkompensation.Info
- Publication number
- FI844472L FI844472L FI844472A FI844472A FI844472L FI 844472 L FI844472 L FI 844472L FI 844472 A FI844472 A FI 844472A FI 844472 A FI844472 A FI 844472A FI 844472 L FI844472 L FI 844472L
- Authority
- FI
- Finland
- Prior art keywords
- signal
- plane
- excitation
- nmr
- foerestaellningssystem
- Prior art date
Links
- 230000005284 excitation Effects 0.000 abstract 3
- 238000003384 imaging method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
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
- G01R33/58—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
-
- 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
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 (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/476,474 US4685468A (en) | 1983-03-18 | 1983-03-18 | NMR imaging system using field compensation |
US47647483 | 1983-03-18 | ||
US8400395 | 1984-03-16 | ||
PCT/US1984/000395 WO1984003773A1 (en) | 1983-03-18 | 1984-03-16 | Nmr imaging system using field compensation |
Publications (4)
Publication Number | Publication Date |
---|---|
FI844472L true FI844472L (fi) | 1984-11-14 |
FI844472A0 FI844472A0 (fi) | 1984-11-14 |
FI84109B FI84109B (fi) | 1991-06-28 |
FI84109C FI84109C (fi) | 1991-10-10 |
Family
ID=23891994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI844472A FI84109C (fi) | 1983-03-18 | 1984-11-14 | Nmr-foerestaellningssystem, i vilket anvaends faeltkompensation. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4685468A (fi) |
EP (1) | EP0138962B1 (fi) |
JP (1) | JPS60500781A (fi) |
DE (1) | DE3482211D1 (fi) |
FI (1) | FI84109C (fi) |
WO (1) | WO1984003773A1 (fi) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US4788500A (en) * | 1985-08-14 | 1988-11-29 | Brigham & Women's Hospital | Measurement of capillary flow using nuclear magnetic resonance |
US4851777A (en) * | 1986-04-21 | 1989-07-25 | Stanford University | Reduced noise NMR localization system |
JPS6382640A (ja) * | 1986-09-29 | 1988-04-13 | 株式会社東芝 | 磁気共鳴イメ−ジング装置の調整方法 |
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 |
NL8603005A (nl) * | 1986-11-27 | 1988-06-16 | Philips Nv | Magnetisch resonantie apparaat met flexibele quadratuur spoelenstelsel. |
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 |
US5019784A (en) * | 1989-08-11 | 1991-05-28 | Regents Of The University Of Minnesota | Time symmetric pulse to uniformly rotate magnetization vectors by an arbitrary angle in the presence of large B1 inhomogeneities and resonance offsets |
DE4008202A1 (de) * | 1990-03-15 | 1991-09-19 | Philips Patentverwaltung | Anordnung zur erzeugung resonanzueberhoehter hochfrequenz-magnetfelder in einem kernspinuntersuchungsgeraet |
GB9006320D0 (en) * | 1990-03-21 | 1990-05-16 | Gen Electric Co Plc | Nuclear magnetic resonance apparatus |
EP0826976A3 (de) * | 1996-08-28 | 1998-10-21 | Philips Patentverwaltung GmbH | MR-Anordnung mit einer Referenzspulen-Anordnung zur Rekonstruktion von MR-Bildern eines Spulen-Arrays |
US6085115A (en) * | 1997-05-22 | 2000-07-04 | Massachusetts Institite Of Technology | Biopotential measurement including electroporation of tissue surface |
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 |
DE10157972B4 (de) * | 2001-11-27 | 2004-01-08 | Bruker Biospin Ag | NMR-Spektrometer und Betriebsverfahren mit Stabilisierung der transversalen Magnetisierung bei supraleitenden NMR-Resonatoren |
DE102004002009B4 (de) * | 2004-01-14 | 2006-07-06 | Siemens Ag | Verfahren zum Betrieb eines Magnetresonanzsystems, Magnetresonanzsystem und Computerprogrammprodukt |
US6952100B1 (en) * | 2004-04-29 | 2005-10-04 | Ge Medical Systems Global Technology, Inc. | Phase controlled surface coil magnetic resonance imaging |
US9279871B2 (en) | 2011-12-20 | 2016-03-08 | General Electric Company | System and apparatus for compensating for magnetic field distortion in an MRI system |
US9322892B2 (en) | 2011-12-20 | 2016-04-26 | General Electric Company | System for magnetic field distortion compensation and method of making same |
WO2014050640A1 (ja) | 2012-09-25 | 2014-04-03 | 株式会社東芝 | 磁気共鳴イメージング装置および送信制御プログラム |
US9274188B2 (en) | 2012-11-30 | 2016-03-01 | General Electric Company | System and apparatus for compensating for magnetic field distortion in an MRI system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3873909A (en) * | 1967-08-21 | 1975-03-25 | Varian Associates | Gyromagnetic apparatus employing computer means for correcting its operating parameters |
GB2027208B (en) * | 1978-08-05 | 1982-12-15 | Emi Ltd | Magnetic field correction in nmr apparatus |
US4284950A (en) * | 1978-08-05 | 1981-08-18 | E M I Limited | Imaging systems |
GB2037996B (en) * | 1978-11-16 | 1983-07-20 | Emi Ltd | Imaging systems |
JPS55154449A (en) * | 1979-05-21 | 1980-12-02 | Hitachi Ltd | Nuclear magnetic resonance apparatus |
GB2076540B (en) * | 1980-05-21 | 1984-02-01 | Emi Ltd | Sampling arrangement for nmr imaging apparatus |
GB2076542B (en) * | 1980-05-21 | 1984-02-15 | Emi Ltd | Nmr imaging apparatus |
JPS6051056B2 (ja) * | 1980-06-13 | 1985-11-12 | 株式会社東芝 | 核磁気共鳴装置 |
JPS5766346A (en) * | 1980-10-11 | 1982-04-22 | Sanyo Electric Co Ltd | Resonance method for nucleus magnetism |
US4458203A (en) * | 1980-12-11 | 1984-07-03 | Picker International Limited | Nuclear magnetic resonance imaging |
JPS57192541A (en) * | 1981-05-25 | 1982-11-26 | Tokyo Shibaura Electric Co | Nuclear magnetic rosonance apparatus for diagnosis |
DE3372907D1 (en) * | 1982-06-09 | 1987-09-17 | Picker Int Ltd | Method and apparatus for monitoring movement of a body under nmr examination |
-
1983
- 1983-03-18 US US06/476,474 patent/US4685468A/en not_active Expired - Fee Related
-
1984
- 1984-03-16 JP JP59501388A patent/JPS60500781A/ja active Granted
- 1984-03-16 WO PCT/US1984/000395 patent/WO1984003773A1/en active IP Right Grant
- 1984-03-16 EP EP84901509A patent/EP0138962B1/en not_active Expired
- 1984-03-16 DE DE8484901509T patent/DE3482211D1/de not_active Expired - Lifetime
- 1984-11-14 FI FI844472A patent/FI84109C/fi not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO1984003773A1 (en) | 1984-09-27 |
FI84109C (fi) | 1991-10-10 |
EP0138962A1 (en) | 1985-05-02 |
FI844472A0 (fi) | 1984-11-14 |
US4685468A (en) | 1987-08-11 |
FI84109B (fi) | 1991-06-28 |
EP0138962B1 (en) | 1990-05-09 |
JPH0257415B2 (fi) | 1990-12-04 |
EP0138962A4 (en) | 1987-04-07 |
DE3482211D1 (de) | 1990-06-13 |
JPS60500781A (ja) | 1985-05-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed | ||
MM | Patent lapsed |
Owner name: MACOVSKI, ALBERT |