FI852764L - Kaernmagnetisk resonansapparat med en permanent magnet. - Google Patents
Kaernmagnetisk resonansapparat med en permanent magnet.Info
- Publication number
- FI852764L FI852764L FI852764A FI852764A FI852764L FI 852764 L FI852764 L FI 852764L FI 852764 A FI852764 A FI 852764A FI 852764 A FI852764 A FI 852764A FI 852764 L FI852764 L FI 852764L
- Authority
- FI
- Finland
- Prior art keywords
- resonansapparat
- kaernmagnetisk
- med
- permanent magnet
- permanent
- 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
- G01R33/28—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
- G01R33/383—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets
-
- 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
- G01R33/387—Compensation of inhomogeneities
- G01R33/3873—Compensation of inhomogeneities using ferromagnetic bodies ; Passive shimming
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8402250 | 1984-07-17 | ||
NL8402250A NL8402250A (nl) | 1984-07-17 | 1984-07-17 | Kernspin resonantie apparaat met een rechthoekig permanent magnetische magneet. |
Publications (4)
Publication Number | Publication Date |
---|---|
FI852764A0 FI852764A0 (fi) | 1985-07-12 |
FI852764L true FI852764L (fi) | 1986-01-18 |
FI86584B FI86584B (fi) | 1992-05-29 |
FI86584C FI86584C (fi) | 1992-09-10 |
Family
ID=19844225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI852764A FI86584C (fi) | 1984-07-17 | 1985-07-12 | Kaernmagnetisk resonansapparat med en permanent magnet. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4695802A (fi) |
EP (1) | EP0170318B1 (fi) |
JP (1) | JPS6138453A (fi) |
DE (1) | DE3566454D1 (fi) |
FI (1) | FI86584C (fi) |
NL (1) | NL8402250A (fi) |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3518852A1 (de) * | 1985-05-23 | 1986-11-27 | Siemens AG, 1000 Berlin und 8000 München | Magnet eines kernspintomographen |
US4679022A (en) * | 1985-12-27 | 1987-07-07 | Sumitomo Special Metal Co. Ltd. | Magnetic field generating device for NMR-CT |
DE3779715T2 (de) * | 1986-09-27 | 1993-01-28 | Sumitomo Spec Metals | Vorrichtung zur erzeugung eines magnetfeldes fuer rechnergesteuerte tomographie mittels magnetischer kernresonanz. |
US4931760A (en) * | 1986-10-08 | 1990-06-05 | Asahi Kasei Kogyo Kabushiki Kaisha | Uniform magnetic field generator |
FR2605449B1 (fr) * | 1986-10-17 | 1988-12-02 | Thomson Cgr | Bloc magnetique a aimantation ajustable pour la production d'un champ magnetique permanent dans une zone d'interet |
FR2611975B1 (fr) * | 1987-03-03 | 1995-02-17 | Commissariat Energie Atomique | Systeme d'aimants permanents pour un champ magnetique intense |
DE3719306A1 (de) * | 1987-06-10 | 1988-12-22 | Bruker Analytische Messtechnik | Magnet fuer nmr-tomographen und verfahren zu seiner herstellung |
US4998976A (en) * | 1987-10-07 | 1991-03-12 | Uri Rapoport | Permanent magnet arrangement |
NL8801162A (nl) * | 1988-05-04 | 1989-12-01 | Philips Nv | Supergeleidend magneetstelsel met supergeleidende cylinders. |
US5134374A (en) * | 1989-06-01 | 1992-07-28 | Applied Superconetics | Magnetic field control apparatus |
IT8921079A0 (it) * | 1989-07-03 | 1989-07-03 | Comec Srl | Sistema per la fabbricazione di magneti permanenti senza giochi, generatori di campo magnetico uniforme e relativi magneti permanenti elementari o compositi. |
JPH03131234A (ja) * | 1989-07-07 | 1991-06-04 | Sumitomo Special Metals Co Ltd | Mri用磁界発生装置 |
US5119057A (en) * | 1989-10-19 | 1992-06-02 | New York University | Optimum design of two-dimensional permanent magnets |
US5162770A (en) * | 1990-02-22 | 1992-11-10 | Esaote Biomedica | Terminations of cylindrical permanent magnets |
JP2808198B2 (ja) * | 1990-07-02 | 1998-10-08 | 住友特殊金属株式会社 | Mri用磁界発生装置とその製法 |
IT1247385B (it) * | 1990-07-16 | 1994-12-12 | Esaote Biomedica | Magneti permanenti generatori di campi magnetici omogenei, in particolare per magnetic resonance imaging (rappresentazione per risonanza magnetica), e relativo metodo di fabbricazione |
EP0479514B1 (en) * | 1990-09-29 | 1998-07-01 | Sumitomo Special Metals Co., Ltd. | Magnetic field generating device used for MRI |
US5162771A (en) * | 1990-10-01 | 1992-11-10 | New York University | Highly efficient yoked permanent magnet |
EP0488015B1 (de) * | 1990-11-30 | 1996-10-30 | Siemens Aktiengesellschaft | Homogenfeldmagnet mit mindestens einer mechanisch auszurichtenden Polplatte |
JPH05211104A (ja) * | 1991-12-05 | 1993-08-20 | Hitachi Medical Corp | 磁気共鳴イメージング装置用静磁場発生装置 |
JP2767659B2 (ja) * | 1991-12-17 | 1998-06-18 | 信越化学工業株式会社 | 磁場発生装置 |
GB9206014D0 (en) * | 1992-03-19 | 1992-04-29 | Oxford Instr Ltd | Magnet assembly |
EP0621954B1 (en) * | 1992-01-13 | 1998-07-22 | Oxford Instruments (Uk) Limited | Determination of rock core characteristics |
DE69332601D1 (de) * | 1992-03-18 | 2003-02-06 | Sumitomo Spec Metals | Magnetfeld-generator zur bilddarstellung mittels kernresonanz |
US5382936A (en) * | 1992-06-02 | 1995-01-17 | The United States Of America As Represented By The Secretary Of The Army | Field augmented permanent magnet structures |
JPH067316A (ja) * | 1992-06-29 | 1994-01-18 | Hitachi Medical Corp | 磁気共鳴イメージング装置の磁界発生装置 |
JP3123731B2 (ja) * | 1993-02-19 | 2001-01-15 | 株式会社日立メディコ | 磁気共鳴イメージング装置の磁界発生装置 |
FR2702592B1 (fr) * | 1993-03-09 | 1995-04-07 | Commissariat Energie Atomique | Structure d'aimant permanent à haute efficacité et à faibles fuites. |
DE59406586D1 (de) * | 1993-03-15 | 1998-09-10 | Siemens Ag | Homogenfeldmagnet mit über Korrekturluftspalte beabstandeten Polplatteneinrichtungen seiner Polschuhe |
GB2276945B (en) * | 1993-04-08 | 1997-02-26 | Oxford Magnet Tech | Improvements in or relating to MRI magnets |
JP3150248B2 (ja) * | 1993-12-27 | 2001-03-26 | 住友特殊金属株式会社 | Mri用磁界発生装置 |
US6150911A (en) * | 1996-07-24 | 2000-11-21 | Odin Technologies Ltd. | Yoked permanent magnet assemblies for use in medical applications |
US6157278A (en) * | 1997-07-23 | 2000-12-05 | Odin Technologies Ltd. | Hybrid magnetic apparatus for use in medical applications |
US6411187B1 (en) | 1997-07-23 | 2002-06-25 | Odin Medical Technologies, Ltd. | Adjustable hybrid magnetic apparatus |
EP1018036A4 (en) | 1997-09-25 | 2002-04-10 | Odin Technologies Ltd | MAGNETIC APPARATUS FOR MAGNETIC RESONANCE IMAGING (MRI) |
WO2001046709A1 (en) * | 1999-12-20 | 2001-06-28 | Koninklijke Philips Electronics N.V. | Mri apparatus with flexible gradient control |
AU2003242339A1 (en) * | 2002-05-20 | 2003-12-02 | Sumitomo Special Metals Co., Ltd. | Magnetic field generating device and mri equipment using the device |
CN103558241B (zh) * | 2013-11-02 | 2016-03-30 | 国家电网公司 | 绝缘子样品老化度检测方法 |
RU2603348C2 (ru) * | 2015-03-26 | 2016-11-27 | Закрытое акционерное общество "Научно - техническое объединение ПРИБОРСЕРВИС" (ЗАО "НТО ПРИБОРСЕРВИС") | Магниторазрядный насос |
EP4053579A1 (en) * | 2020-04-17 | 2022-09-07 | Siemens Healthcare GmbH | Magnet system with decoupled gradient coils for a magnetic resonance imaging system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3768054A (en) * | 1972-04-03 | 1973-10-23 | Gen Electric | Low flux leakage magnet construction |
US4411270A (en) * | 1978-11-20 | 1983-10-25 | Damadian Raymond V | Apparatus and method for nuclear magnetic resonance scanning and mapping |
US4355236A (en) * | 1980-04-24 | 1982-10-19 | New England Nuclear Corporation | Variable strength beam line multipole permanent magnets and methods for their use |
JPS58193557U (ja) * | 1982-06-18 | 1983-12-23 | 三菱製鋼磁材株式会社 | イオンポンプ用磁石装置 |
WO1984000611A1 (en) * | 1982-08-04 | 1984-02-16 | William H Oldendorf | Adjustable magnet suitable for in vivo nmr imaging and method of adjusting the same |
CA1198162A (en) * | 1982-09-23 | 1985-12-17 | Robert D. Hay | Nmr imaging apparatus |
DE3245945A1 (de) * | 1982-12-11 | 1984-06-14 | Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten | Elektromagnet fuer die nmr-tomographie |
US4538130A (en) * | 1984-04-23 | 1985-08-27 | Field Effects, Inc. | Tunable segmented ring magnet and method of manufacture |
JPS61274305A (ja) * | 1985-05-29 | 1986-12-04 | Asahi Chem Ind Co Ltd | 均一磁場発生装置 |
-
1984
- 1984-07-17 NL NL8402250A patent/NL8402250A/nl not_active Application Discontinuation
-
1985
- 1985-07-08 DE DE8585201113T patent/DE3566454D1/de not_active Expired
- 1985-07-08 EP EP85201113A patent/EP0170318B1/en not_active Expired
- 1985-07-09 US US06/753,205 patent/US4695802A/en not_active Expired - Lifetime
- 1985-07-12 FI FI852764A patent/FI86584C/fi not_active IP Right Cessation
- 1985-07-16 JP JP15533085A patent/JPS6138453A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
NL8402250A (nl) | 1986-02-17 |
US4695802A (en) | 1987-09-22 |
FI86584B (fi) | 1992-05-29 |
FI86584C (fi) | 1992-09-10 |
JPS6138453A (ja) | 1986-02-24 |
JPH0475008B2 (fi) | 1992-11-27 |
EP0170318B1 (en) | 1988-11-23 |
FI852764A0 (fi) | 1985-07-12 |
DE3566454D1 (en) | 1988-12-29 |
EP0170318A1 (en) | 1986-02-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed | ||
MM | Patent lapsed |
Owner name: N.V. PHILIPS GLOEILAMPENFABRIEKEN |