DE69932570D1 - Magnetsystem für die bildgebende magnetische Resonanz - Google Patents
Magnetsystem für die bildgebende magnetische ResonanzInfo
- Publication number
- DE69932570D1 DE69932570D1 DE69932570T DE69932570T DE69932570D1 DE 69932570 D1 DE69932570 D1 DE 69932570D1 DE 69932570 T DE69932570 T DE 69932570T DE 69932570 T DE69932570 T DE 69932570T DE 69932570 D1 DE69932570 D1 DE 69932570D1
- Authority
- DE
- Germany
- Prior art keywords
- imaging volume
- pair
- magnetic flux
- magnetic
- pole pieces
- 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
- G01R33/28—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
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/141,990 US6147495A (en) | 1998-08-28 | 1998-08-28 | Magnetic resonance imaging with integrated poleface features |
US141990 | 1998-08-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69932570D1 true DE69932570D1 (de) | 2006-09-14 |
DE69932570T2 DE69932570T2 (de) | 2007-10-25 |
Family
ID=22498117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69932570T Expired - Fee Related DE69932570T2 (de) | 1998-08-28 | 1999-08-03 | Magnetsystem für die bildgebende magnetische Resonanz |
Country Status (5)
Country | Link |
---|---|
US (1) | US6147495A (de) |
EP (1) | EP0982599B1 (de) |
JP (1) | JP2000083924A (de) |
AT (1) | ATE335209T1 (de) |
DE (1) | DE69932570T2 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002336215A (ja) * | 2001-05-17 | 2002-11-26 | Mitsubishi Electric Corp | 超電導マグネット装置及び磁場均一度調整方法 |
US6861933B1 (en) * | 2001-05-17 | 2005-03-01 | Mitsubishi Denki Kabushiki Kaisha | Superconductive magnet device |
EP1459087A1 (de) * | 2001-12-10 | 2004-09-22 | Koninklijke Philips Electronics N.V. | Offenes magnetsystem für die bildgebende magnetische resonanz (mri) |
AU2003223037A1 (en) * | 2002-05-08 | 2003-11-11 | Koninklijke Philips Electronics N.V. | Magnetic resonance imaging apparatus with reduced noise production |
CN100415162C (zh) * | 2005-03-09 | 2008-09-03 | Ge医疗系统环球技术有限公司 | 磁体系统和磁共振成像系统 |
GB2448479B (en) * | 2007-04-18 | 2009-06-03 | Siemens Magnet Technology Ltd | Improved shim for imaging magnets |
CN101388271A (zh) * | 2007-09-14 | 2009-03-18 | Ge医疗系统环球技术有限公司 | 磁体系统和mri设备 |
GB201114045D0 (en) * | 2011-08-15 | 2011-09-28 | Emscan Ltd | Magnet |
CN105072990A (zh) * | 2013-04-15 | 2015-11-18 | 株式会社东芝 | 磁共振成像装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4827235A (en) * | 1986-07-18 | 1989-05-02 | Kabushiki Kaisha Toshiba | Magnetic field generator useful for a magnetic resonance imaging instrument |
US4766378A (en) * | 1986-11-28 | 1988-08-23 | Fonar Corporation | Nuclear magnetic resonance scanners |
GB8825529D0 (en) * | 1988-11-01 | 1988-12-07 | Oxford Magnet Tech | Magnetic field generating assembly |
US5134374A (en) * | 1989-06-01 | 1992-07-28 | Applied Superconetics | Magnetic field control apparatus |
US5250901A (en) * | 1991-11-07 | 1993-10-05 | The Regents Of The University Of California | Open architecture iron core electromagnet for MRI using superconductive winding |
JP3742662B2 (ja) * | 1992-08-05 | 2006-02-08 | ゼネラル・エレクトリック・カンパニイ | 開放形磁気共鳴イメージングに適した磁石 |
US5495171A (en) * | 1993-01-19 | 1996-02-27 | Fonar Corporation | Eddy current control in NMR imaging systems |
GB2276946B (en) * | 1993-04-08 | 1997-04-02 | Oxford Magnet Tech | Improvements in or relating to MRI magnets |
FI933834A (fi) * | 1993-09-01 | 1995-03-02 | Picker Nordstar Oy | Magneettikuvauslaitteen napakenkä |
US5539366A (en) * | 1994-07-27 | 1996-07-23 | General Electric Company | Magnet having contoured pole faces for magnetic field homogeneity |
EP0985934B1 (de) * | 1995-08-28 | 2004-10-20 | Shin-Etsu Chemical Co., Ltd. | Magnetkreisanordnung mit einander gegenüberliegenden Permanentmagneten |
-
1998
- 1998-08-28 US US09/141,990 patent/US6147495A/en not_active Expired - Fee Related
-
1999
- 1999-08-03 DE DE69932570T patent/DE69932570T2/de not_active Expired - Fee Related
- 1999-08-03 AT AT99306174T patent/ATE335209T1/de not_active IP Right Cessation
- 1999-08-03 EP EP99306174A patent/EP0982599B1/de not_active Expired - Lifetime
- 1999-08-20 JP JP11233711A patent/JP2000083924A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2000083924A (ja) | 2000-03-28 |
DE69932570T2 (de) | 2007-10-25 |
US6147495A (en) | 2000-11-14 |
EP0982599A2 (de) | 2000-03-01 |
ATE335209T1 (de) | 2006-08-15 |
EP0982599B1 (de) | 2006-08-02 |
EP0982599A3 (de) | 2002-04-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8320 | Willingness to grant licences declared (paragraph 23) | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |