DE69930702D1 - Shimanordnung für die Polfläche eines Magneten - Google Patents
Shimanordnung für die Polfläche eines MagnetenInfo
- Publication number
- DE69930702D1 DE69930702D1 DE69930702T DE69930702T DE69930702D1 DE 69930702 D1 DE69930702 D1 DE 69930702D1 DE 69930702 T DE69930702 T DE 69930702T DE 69930702 T DE69930702 T DE 69930702T DE 69930702 D1 DE69930702 D1 DE 69930702D1
- Authority
- DE
- Germany
- Prior art keywords
- magnet
- pole face
- shim arrangement
- shim
- arrangement
- 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
- G01R33/3873—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)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/178,320 US5923235A (en) | 1998-10-23 | 1998-10-23 | Shim assembly for a pole face of a magnet |
US178320 | 1998-10-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69930702D1 true DE69930702D1 (de) | 2006-05-18 |
DE69930702T2 DE69930702T2 (de) | 2006-12-21 |
Family
ID=22652083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69930702T Expired - Fee Related DE69930702T2 (de) | 1998-10-23 | 1999-10-21 | Shimanordnung für die Polfläche eines Magneten |
Country Status (4)
Country | Link |
---|---|
US (1) | US5923235A (de) |
EP (1) | EP0996000B1 (de) |
JP (1) | JP4427141B2 (de) |
DE (1) | DE69930702T2 (de) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6275128B1 (en) * | 1997-12-26 | 2001-08-14 | Sumitomo Special Metals Co., Ltd. | MRI magnetic field generator |
US5992006A (en) * | 1998-12-23 | 1999-11-30 | Fonar Corporation | Method for passive control of magnet hemogeneity |
US6275129B1 (en) * | 1999-10-26 | 2001-08-14 | General Electric Company | Shim assembly for a magnet and method for making |
US6166617A (en) * | 1999-11-09 | 2000-12-26 | General Electric Company | Pole piece assembly and open magnet having same |
US6973711B1 (en) * | 2000-05-24 | 2005-12-13 | Fonar Corporation | Method for making pieces for a magnetic resonance imaging magnet |
JP2002165773A (ja) * | 2000-11-29 | 2002-06-11 | Ge Medical Systems Global Technology Co Llc | 静磁界均一化方法およびmri装置 |
US6566991B1 (en) * | 2001-04-24 | 2003-05-20 | Fonar Corporation | Apparatus and method of shimming a magnetic field |
US7345559B2 (en) * | 2001-09-13 | 2008-03-18 | General Electric Company | High field open MRI magnet isolation system and method |
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 |
US6627003B2 (en) | 2001-10-24 | 2003-09-30 | Ge Medical Systems Global Technology Company, Llc | NMR shim forming method |
DE10214112B4 (de) * | 2002-03-28 | 2006-01-26 | Siemens Ag | Shimkasten, Gradientenspulensystem und Magnetresonanzgerät zum Aufnehmen des Shimkastens |
US6984982B2 (en) * | 2002-07-29 | 2006-01-10 | Ge Medical Systems Global Technology Company Llc | Method and system for shimming an MRI magnet assembly |
US6836119B2 (en) * | 2002-10-15 | 2004-12-28 | Koninklijke Philips Electronics, N.V. | Method and apparatus for aligning a magnetic field modifying structure in a magnetic resonance imaging scanner |
US7081752B2 (en) * | 2003-04-04 | 2006-07-25 | General Electric Company | System and method of electrically loading radio-frequency coils using conductive polymers |
US7646274B2 (en) * | 2003-05-01 | 2010-01-12 | Uri Rapoport | Apparatus and method for non-invasive measurement of cardiac output |
JP4767688B2 (ja) * | 2003-10-15 | 2011-09-07 | 株式会社日立メディコ | 磁気共鳴イメージング装置 |
JP3733441B1 (ja) | 2004-07-02 | 2006-01-11 | 株式会社日立製作所 | 磁気共鳴撮像装置及びその磁石装置 |
US7295012B1 (en) | 2006-04-28 | 2007-11-13 | General Electric Company | Methods and apparatus for MRI shim elements |
US7802344B2 (en) | 2006-06-08 | 2010-09-28 | Handi-Shim, Llc | Affixable plastic shim |
JP4368909B2 (ja) * | 2007-05-25 | 2009-11-18 | 三菱電機株式会社 | 超電導マグネットの磁場調整装置及び磁場調整方法 |
US20100214093A1 (en) * | 2009-02-25 | 2010-08-26 | Williams Gene A | Wireless messaging system for parents and children |
JP4999897B2 (ja) * | 2009-08-26 | 2012-08-15 | 三菱電機株式会社 | 超電導マグネットの磁場調整装置及び磁場調整方法 |
JP5931666B2 (ja) * | 2012-09-21 | 2016-06-08 | 株式会社日立メディコ | 磁気共鳴撮像装置および磁石装置 |
DE102013013719A1 (de) * | 2013-08-20 | 2015-03-12 | Krohne Ag | Homogenisierungsvorrichtung zur Homogenisierung eines Magnetfelds |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0114889A1 (de) * | 1982-08-04 | 1984-08-08 | OLDENDORF, William H. | Einstellbarer magnet geeignet zur in vivo nmr-bildaufnahme und verfahren zum einstellen desselben |
US5061897A (en) * | 1990-03-23 | 1991-10-29 | Fonar Corporation | Eddy current control in magnetic resonance imaging |
US5124651A (en) * | 1990-10-24 | 1992-06-23 | Fonar Corporation | Nuclear magnetic resonance scanners with composite pole facings |
US5317298A (en) * | 1993-01-04 | 1994-05-31 | General Electric Company | Apparatus and method for passive shimming of a superconducting magnet which images human limbs |
US5345208A (en) * | 1993-05-26 | 1994-09-06 | General Electric Company | Pole face design for a C-shaped superconducting magnet |
FI933834A (fi) * | 1993-09-01 | 1995-03-02 | Picker Nordstar Oy | Magneettikuvauslaitteen napakenkä |
US5446434A (en) * | 1994-07-27 | 1995-08-29 | General Electric Company | Magnet having pole faces with trapezoidal-shaped shims |
US5677854A (en) * | 1995-01-17 | 1997-10-14 | General Electric Company | Method for passively shimming a magnet |
JP3906418B2 (ja) * | 1996-08-26 | 2007-04-18 | 株式会社Neomax | Mri用磁界発生装置 |
-
1998
- 1998-10-23 US US09/178,320 patent/US5923235A/en not_active Expired - Lifetime
-
1999
- 1999-10-19 JP JP29606199A patent/JP4427141B2/ja not_active Expired - Fee Related
- 1999-10-21 DE DE69930702T patent/DE69930702T2/de not_active Expired - Fee Related
- 1999-10-21 EP EP99308323A patent/EP0996000B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0996000B1 (de) | 2006-04-05 |
JP4427141B2 (ja) | 2010-03-03 |
DE69930702T2 (de) | 2006-12-21 |
EP0996000A3 (de) | 2002-03-20 |
EP0996000A2 (de) | 2000-04-26 |
US5923235A (en) | 1999-07-13 |
JP2000133516A (ja) | 2000-05-12 |
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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 |