DE69319090D1 - Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz - Google Patents
Verbesserungen an Magneten der Bilderzeugung mittels magnetischer ResonanzInfo
- Publication number
- DE69319090D1 DE69319090D1 DE69319090T DE69319090T DE69319090D1 DE 69319090 D1 DE69319090 D1 DE 69319090D1 DE 69319090 T DE69319090 T DE 69319090T DE 69319090 T DE69319090 T DE 69319090T DE 69319090 D1 DE69319090 D1 DE 69319090D1
- Authority
- DE
- Germany
- Prior art keywords
- magnetic resonance
- resonance imaging
- imaging enhancements
- enhancements
- magnetic
- 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
- G01R33/387—Compensation of inhomogeneities
- G01R33/3875—Compensation of inhomogeneities using correction coil assemblies, e.g. active shimming
-
- 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 (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9307368A GB2276945B (en) | 1993-04-08 | 1993-04-08 | Improvements in or relating to MRI magnets |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69319090D1 true DE69319090D1 (de) | 1998-07-16 |
DE69319090T2 DE69319090T2 (de) | 1998-10-08 |
Family
ID=10733572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69319090T Expired - Fee Related DE69319090T2 (de) | 1993-04-08 | 1993-11-19 | Verbesserungen an Magneten der Bilderzeugung mittels magnetischer Resonanz |
Country Status (5)
Country | Link |
---|---|
US (1) | US5400786A (de) |
EP (1) | EP0619500B1 (de) |
JP (1) | JPH06304150A (de) |
DE (1) | DE69319090T2 (de) |
GB (1) | GB2276945B (de) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2710780B1 (fr) * | 1993-09-30 | 1995-10-27 | Commissariat Energie Atomique | Structures magnétiques ouvertes. |
DE4424580C2 (de) * | 1994-07-13 | 1996-09-05 | Bruker Analytische Messtechnik | NMR-Scheibenspule |
US5635839A (en) * | 1994-11-04 | 1997-06-03 | Picker International, Inc. | High order passive shimming assembly for MRI magnets |
GB2295673B (en) * | 1994-11-29 | 1999-04-28 | Oxford Magnet Tech | Improvements in or relating to cryogenic mri magnets |
GB2295672B (en) * | 1994-11-29 | 1999-05-12 | Oxford Magnet Tech | Improvements in or relating to cryogenic MRI magnets |
US5623430A (en) * | 1995-01-17 | 1997-04-22 | General Electric Company | Method for passively shimming an open magnet |
FR2754066B1 (fr) * | 1996-10-01 | 1998-10-30 | Oreal | Dispositif d'examen d'un volume de faible profondeur par resonance magnetique nucleaire |
US6157278A (en) * | 1997-07-23 | 2000-12-05 | Odin Technologies Ltd. | Hybrid magnetic apparatus for use in medical applications |
DE19911043A1 (de) * | 1999-03-12 | 2000-09-14 | Philips Corp Intellectual Pty | MR-Verfahren |
JP2000262486A (ja) * | 1999-03-17 | 2000-09-26 | Hitachi Ltd | 静磁場発生装置及び方法 |
US6842002B2 (en) | 2000-01-19 | 2005-01-11 | Millennium Technology, Inc. | C-shaped magnetic resonance imaging system |
US6577125B2 (en) * | 2000-12-18 | 2003-06-10 | Halliburton Energy Services, Inc. | Temperature compensated magnetic field apparatus for NMR measurements |
DE10104054C1 (de) * | 2001-01-31 | 2002-07-04 | Bruker Ag Faellanden | Magnetanordnung mit einem supraleitenden Magnetspulensystem und einer magnetischen Feldformvorrichtung für hochauflösende magnetische Resonanzspektroskopie und Verfahren zur Bestimmung von Fertigungstoleranzen der Feldformvorrichtung |
US6518867B2 (en) | 2001-04-03 | 2003-02-11 | General Electric Company | Permanent magnet assembly and method of making thereof |
US6662434B2 (en) | 2001-04-03 | 2003-12-16 | General Electric Company | Method and apparatus for magnetizing a permanent magnet |
JP3878434B2 (ja) * | 2001-05-10 | 2007-02-07 | 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 | 磁気共鳴撮像用コイル構造体および磁気共鳴撮像装置 |
DE10147984B4 (de) | 2001-09-28 | 2007-10-11 | Siemens Ag | Magnetresonanz-Untersuchungsgerät mit einer Einrichtung zur Erzeugung eines homogenen Magnetfeldes und Verfahren zur Verbesserung der Homogenität eines Magnetfeldes |
US20030079334A1 (en) * | 2001-10-29 | 2003-05-01 | Minfeng Xu | Magnetic homogeneity design method |
US7463027B2 (en) * | 2003-05-02 | 2008-12-09 | Halliburton Energy Services, Inc. | Systems and methods for deep-looking NMR logging |
CA2828175A1 (en) * | 2003-10-03 | 2005-04-21 | Halliburton Energy Services, Inc. | System and methods for t1-based logging |
EP1704420A1 (de) * | 2003-10-30 | 2006-09-27 | Koninklijke Philips Electronics N.V. | Mri-system mit magnet für variables sichtfeld |
WO2005122060A2 (en) * | 2004-06-14 | 2005-12-22 | Doron Kwiat | A magnetic resonance imaging method and device using a static and homogeneous magnetic field |
US7224167B2 (en) * | 2004-11-30 | 2007-05-29 | General Electric Company | Magnetic field generating apparatus and method for magnetic resonance imaging |
US7439836B2 (en) * | 2005-12-28 | 2008-10-21 | General Electric Company | Magnetic field generating apparatus for magnetic resonance imaging |
US7295012B1 (en) * | 2006-04-28 | 2007-11-13 | General Electric Company | Methods and apparatus for MRI shim elements |
GB2448479B (en) * | 2007-04-18 | 2009-06-03 | Siemens Magnet Technology Ltd | Improved shim for imaging magnets |
CH697642B1 (de) * | 2007-05-15 | 2008-12-31 | Philippe Saint Ger Ag | Verfahren zur Beeinflussung der magnetischen Kopplung zwischen zwei voneinander beabstandeten Körpern sowie Vorrichtung zur Durchführung des Verfahrens. |
WO2009155691A1 (en) | 2008-06-24 | 2009-12-30 | Fallone Gino B | Magnetic assembly and method for defining a magnetic field for an imaging volume |
WO2011066652A1 (en) * | 2009-12-02 | 2011-06-09 | Nanalysis Corp. | Method and apparatus for producing homogeneous magnetic fields |
CN105072990A (zh) * | 2013-04-15 | 2015-11-18 | 株式会社东芝 | 磁共振成像装置 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3123493A1 (de) * | 1981-06-13 | 1982-12-30 | Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten | Elektromagnet fuer die nmr-tomographie |
DE3245944A1 (de) * | 1982-12-11 | 1984-06-14 | Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten | Elektromagnet fuer die nmr-tomographie |
JPH0640869B2 (ja) * | 1984-01-18 | 1994-06-01 | 株式会社日立メディコ | Νmrイメ−ジング装置 |
NL8402250A (nl) * | 1984-07-17 | 1986-02-17 | Philips Nv | Kernspin resonantie apparaat met een rechthoekig permanent magnetische magneet. |
JPS61200451A (ja) * | 1985-03-01 | 1986-09-05 | Sanyo Electric Co Ltd | 核磁気共鳴撮像装置 |
US4703276A (en) * | 1985-04-24 | 1987-10-27 | Elscint Ltd. | Permanent magnet ring assembly for NMR imaging system and method for using such assembly |
US4707663A (en) * | 1985-08-15 | 1987-11-17 | Fonar Corporation | Nuclear magnetic resonance apparatus using low energy magnetic elements |
NL8502340A (nl) * | 1985-08-26 | 1987-03-16 | Philips Nv | Magnetisch resonantie apparaat met veld homogeniserende magnetische elementen. |
GB8530295D0 (en) * | 1985-12-09 | 1986-01-22 | Picker Int Ltd | Electromagnet arrangements |
GB2184243B (en) * | 1985-12-09 | 1989-12-20 | Picker Int Ltd | Electromagnet arrangements |
US4931760A (en) * | 1986-10-08 | 1990-06-05 | Asahi Kasei Kogyo Kabushiki Kaisha | Uniform magnetic field generator |
WO1988008126A1 (en) * | 1987-04-15 | 1988-10-20 | Oxford Magnet Technology Limited | Magnetic field generating apparatus |
JPH0690975B2 (ja) * | 1988-06-03 | 1994-11-14 | 三菱電機株式会社 | 磁場補正用磁性体シム |
FI85193C (fi) * | 1989-11-27 | 1992-03-10 | Instrumentarium Oy | Undersoekningsfoerfarande och - anordning. |
US5061897A (en) * | 1990-03-23 | 1991-10-29 | Fonar Corporation | Eddy current control in magnetic resonance imaging |
FR2667948B1 (fr) * | 1990-10-12 | 1993-04-16 | Magnetech | Systeme magnetique a champ homogene de grande accessibilite. |
FI91448C (fi) * | 1991-11-22 | 1994-06-27 | Picker Nordstar Oy | Magneettikuvauslaite ja -menetelmä |
GB2262611A (en) * | 1991-12-19 | 1993-06-23 | Gen Electric | Side access mri magnet with external and internal shims |
-
1993
- 1993-04-08 GB GB9307368A patent/GB2276945B/en not_active Revoked
- 1993-11-19 EP EP93118633A patent/EP0619500B1/de not_active Expired - Lifetime
- 1993-11-19 DE DE69319090T patent/DE69319090T2/de not_active Expired - Fee Related
-
1994
- 1994-01-04 US US08/177,821 patent/US5400786A/en not_active Expired - Lifetime
- 1994-01-24 JP JP6005892A patent/JPH06304150A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
EP0619500B1 (de) | 1998-06-10 |
DE69319090T2 (de) | 1998-10-08 |
GB2276945A (en) | 1994-10-12 |
GB2276945A8 (en) | 1995-03-29 |
GB9307368D0 (en) | 1993-06-02 |
GB2276945B (en) | 1997-02-26 |
EP0619500A1 (de) | 1994-10-12 |
JPH06304150A (ja) | 1994-11-01 |
US5400786A (en) | 1995-03-28 |
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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 |