JP5668681B2 - 磁界発生装置 - Google Patents
磁界発生装置 Download PDFInfo
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- JP5668681B2 JP5668681B2 JP2011501683A JP2011501683A JP5668681B2 JP 5668681 B2 JP5668681 B2 JP 5668681B2 JP 2011501683 A JP2011501683 A JP 2011501683A JP 2011501683 A JP2011501683 A JP 2011501683A JP 5668681 B2 JP5668681 B2 JP 5668681B2
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- permanent magnet
- magnet group
- magnetic field
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- 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
- G01R33/3806—Open magnet assemblies for improved access to the sample, e.g. C-type or U-type 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
- G01R33/3802—Manufacture or installation of magnet assemblies; Additional hardware for transportation or installation of the magnet assembly or for providing mechanical support to components of the magnet assembly
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49014—Superconductor
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Description
11a,11b 磁極ユニット
12a,12b 板状継鉄
14a,14b 永久磁石群
16a,16b 磁極片
18a 永久磁石群の外周面
18b 永久磁石群の露出部
20 永久磁石
34,72 枠状部材
36 鍔状部材
42,46,62,66,70 介挿部材
44,48,64,68,74 押しボルト
50,50a,50b 板状部材
図1を参照して、この発明の一実施形態の磁界発生装置10は、オープンタイプでありかつ永久磁石型のMRI用磁界発生装置であり、空隙を形成して対向配置される一対の磁極ユニット11aおよび11bを含む。
カバー部材として、図6に示すような板状部材50を永久磁石群14aおよび14bの周囲の所望の位置に、図示しないボルト等の固定部材によって固定してもよい。板状部材50は、永久磁石群14aおよび14bに部分的に設けられる。後述する板状部材50a,50bについても、永久磁石群14aおよび14bに部分的に設けられる。
Claims (5)
- 相互に接着される複数の永久磁石を含み一方主面側に磁界を発生させる永久磁石群、
前記永久磁石群に沿うように設けられるカバー部材、
前記永久磁石群を押圧するために前記カバー部材に設けられる押圧部材、および
前記永久磁石群の前記一方主面の露出する部分である露出部を形成するように前記永久磁石群の前記一方主面に設けられる磁極片を備え、
前記カバー部材は、前記永久磁石群の前記露出部を覆うように前記磁極片の外周面に設けられる鍔状部材を含み、
前記押圧部材は前記鍔状部材に設けられる、磁界発生装置。 - 前記永久磁石群と前記カバー部材との隙間に介挿される介挿部材をさらに含み、
前記押圧部材は、前記介挿部材を介して前記永久磁石群を押圧し、
前記介挿部材には、選択的に磁性体からなるものが用いられる、請求項1に記載の磁界発生装置。 - 前記カバー部材は、前記永久磁石群を囲むように設けられる枠状部材を含み、
前記押圧部材は前記枠状部材にも設けられる、請求項1または2に記載の磁界発生装置。 - 前記カバー部材は非磁性体からなる、請求項1から3のいずれかに記載の磁界発生装置。
- 相互に接着される複数の永久磁石を含み一方主面側に磁界を発生させる永久磁石群、
前記永久磁石群に沿うように設けられるカバー部材、
前記永久磁石群を押圧するために前記カバー部材に設けられる押圧部材、および
前記永久磁石群と前記カバー部材との隙間に介挿される介挿部材を備え、
前記押圧部材は、前記介挿部材を介して前記永久磁石群を押圧し、
前記介挿部材には、選択的に磁性体からなるものが用いられる、磁界発生装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011501683A JP5668681B2 (ja) | 2009-02-27 | 2010-02-26 | 磁界発生装置 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009045881 | 2009-02-27 | ||
JP2009045881 | 2009-02-27 | ||
PCT/JP2010/053166 WO2010098469A1 (ja) | 2009-02-27 | 2010-02-26 | 磁界発生装置 |
JP2011501683A JP5668681B2 (ja) | 2009-02-27 | 2010-02-26 | 磁界発生装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2010098469A1 JPWO2010098469A1 (ja) | 2012-09-06 |
JP5668681B2 true JP5668681B2 (ja) | 2015-02-12 |
Family
ID=42665673
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2011501683A Active JP5668681B2 (ja) | 2009-02-27 | 2010-02-26 | 磁界発生装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8674797B2 (ja) |
EP (1) | EP2401961B1 (ja) |
JP (1) | JP5668681B2 (ja) |
CN (1) | CN102333482B (ja) |
WO (1) | WO2010098469A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2997197B1 (fr) * | 2012-10-23 | 2016-02-12 | Commissariat Energie Atomique | Procede et dispositif de maintien et de reglage d'aimants permanents inclus dans un systeme de rmn |
US10847294B2 (en) * | 2017-07-10 | 2020-11-24 | Aspect Imaging Ltd. | System for generating a magnetic field |
US20210110966A1 (en) * | 2019-10-09 | 2021-04-15 | Power Integrations, Inc. | Magnet with multiple discs |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003168604A (ja) * | 2001-11-29 | 2003-06-13 | Sumitomo Special Metals Co Ltd | 磁界発生装置 |
JP2004305743A (ja) * | 2003-04-03 | 2004-11-04 | Ge Medical Systems Global Technology Co Llc | 磁化された永久磁石ブロックを組み立てるための方法及び装置 |
JP2004305746A (ja) * | 2003-04-03 | 2004-11-04 | Ge Medical Systems Global Technology Co Llc | 永久磁石ブロックを位置決めするための方法及び装置 |
JP2006173431A (ja) * | 2004-12-17 | 2006-06-29 | Neomax Co Ltd | 磁界発生装置 |
JP2008279265A (ja) * | 2008-07-07 | 2008-11-20 | Hitachi Metals Ltd | Mri用磁界発生装置 |
Family Cites Families (24)
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JPS5357093A (en) * | 1976-11-04 | 1978-05-24 | Hitachi Ltd | Fixing method of magnetic pole piece of nuclear magnetic resonance device |
IT8322561V0 (it) | 1983-08-02 | 1983-08-02 | Black & Decker Inc | Braccio portautensile da applicare a sbalzo su colonne portanti e, dotato di mezzi di guida, in particolare per squadratrici angolari. |
JPS60239005A (ja) | 1984-05-11 | 1985-11-27 | Sumitomo Special Metals Co Ltd | 磁界発生装置 |
DE3566185D1 (en) * | 1984-04-11 | 1988-12-15 | Sumitomo Spec Metals | Magnetic field generating device for nmr-ct |
JPS60257109A (ja) | 1984-06-01 | 1985-12-18 | Sumitomo Special Metals Co Ltd | 磁界発生装置 |
JPS61152956A (ja) | 1984-12-26 | 1986-07-11 | Takeshi Sato | デイ−ゼル機関の微粒子状排出物質の低減方法 |
JPS63107006A (ja) | 1986-10-23 | 1988-05-12 | Toshiba Corp | 磁極位置調整付磁界発生装置 |
JP2940438B2 (ja) | 1995-06-06 | 1999-08-25 | 住友金属工業株式会社 | 渦電流式減速装置の永久磁石固定装置 |
JPH10275720A (ja) | 1997-03-31 | 1998-10-13 | Shin Etsu Chem Co Ltd | 永久磁石磁気回路 |
JP3638423B2 (ja) | 1997-12-25 | 2005-04-13 | 信越化学工業株式会社 | 高耐食性永久磁石 |
IT1305960B1 (it) * | 1998-05-11 | 2001-05-21 | Esaote Spa | Struttura di magnete in particolare per macchine per il rilevamentod'immagine in risonanza magnetica nucleare. |
JP4123649B2 (ja) | 1999-08-12 | 2008-07-23 | 日立金属株式会社 | 磁界発生装置およびその組立方法 |
JP4813645B2 (ja) | 1999-11-16 | 2011-11-09 | 日立金属株式会社 | 磁極ユニット、その組立方法および磁界発生装置 |
EP1666910B1 (en) | 1999-11-16 | 2009-03-11 | Hitachi Metals, Ltd. | Magnetic-field generator comprising a pole-piece unit |
US6642826B1 (en) * | 2000-08-09 | 2003-11-04 | Sumitomo Special Metals Co., Ltd. | Magnetic field generator and assembling method thereof |
JP3489741B2 (ja) | 2000-10-04 | 2004-01-26 | 住友特殊金属株式会社 | 希土類焼結磁石およびその製造方法 |
KR100771676B1 (ko) | 2000-10-04 | 2007-10-31 | 가부시키가이샤 네오맥스 | 희토류 소결자석 및 그 제조방법 |
US7463129B1 (en) * | 2000-11-22 | 2008-12-09 | Fonar Corporation | Magnet structure |
JP4254121B2 (ja) | 2002-04-03 | 2009-04-15 | 日立金属株式会社 | 希土類焼結磁石およびその製造方法 |
US6828891B2 (en) * | 2002-07-25 | 2004-12-07 | Ge Medical Systems Global Technology Company, Llc | Method for assembling magnetic members for magnetic resonance imaging magnetic field generator |
US6664878B1 (en) * | 2002-07-26 | 2003-12-16 | Ge Medical Systems Global Technology Company, Llc | Method for assembling magnetic members for magnetic resonance imaging magnetic field generator |
US6861934B2 (en) * | 2003-01-22 | 2005-03-01 | Carl H. Strom | Unipolar magnetic system |
JP4518752B2 (ja) | 2003-06-06 | 2010-08-04 | 日立金属株式会社 | Mri用磁界発生装置 |
CN101031238B (zh) * | 2004-09-30 | 2010-07-28 | 日立金属株式会社 | Mri用磁场发生装置 |
-
2010
- 2010-02-26 US US13/144,996 patent/US8674797B2/en active Active
- 2010-02-26 JP JP2011501683A patent/JP5668681B2/ja active Active
- 2010-02-26 EP EP10746348.1A patent/EP2401961B1/en active Active
- 2010-02-26 CN CN201080009608.0A patent/CN102333482B/zh active Active
- 2010-02-26 WO PCT/JP2010/053166 patent/WO2010098469A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003168604A (ja) * | 2001-11-29 | 2003-06-13 | Sumitomo Special Metals Co Ltd | 磁界発生装置 |
JP2004305743A (ja) * | 2003-04-03 | 2004-11-04 | Ge Medical Systems Global Technology Co Llc | 磁化された永久磁石ブロックを組み立てるための方法及び装置 |
JP2004305746A (ja) * | 2003-04-03 | 2004-11-04 | Ge Medical Systems Global Technology Co Llc | 永久磁石ブロックを位置決めするための方法及び装置 |
JP2006173431A (ja) * | 2004-12-17 | 2006-06-29 | Neomax Co Ltd | 磁界発生装置 |
JP2008279265A (ja) * | 2008-07-07 | 2008-11-20 | Hitachi Metals Ltd | Mri用磁界発生装置 |
Also Published As
Publication number | Publication date |
---|---|
US20110273254A1 (en) | 2011-11-10 |
JPWO2010098469A1 (ja) | 2012-09-06 |
CN102333482B (zh) | 2014-05-28 |
EP2401961A1 (en) | 2012-01-04 |
EP2401961A4 (en) | 2013-06-12 |
CN102333482A (zh) | 2012-01-25 |
WO2010098469A9 (ja) | 2010-11-18 |
EP2401961B1 (en) | 2020-11-18 |
WO2010098469A1 (ja) | 2010-09-02 |
US8674797B2 (en) | 2014-03-18 |
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