HK1046310A1 - 永久磁體和磁場調節片設計 - Google Patents

永久磁體和磁場調節片設計

Info

Publication number
HK1046310A1
HK1046310A1 HK02107905.7A HK02107905A HK1046310A1 HK 1046310 A1 HK1046310 A1 HK 1046310A1 HK 02107905 A HK02107905 A HK 02107905A HK 1046310 A1 HK1046310 A1 HK 1046310A1
Authority
HK
Hong Kong
Prior art keywords
permanent magnet
shim design
shim
design
permanent
Prior art date
Application number
HK02107905.7A
Other languages
English (en)
Inventor
Leonard Walter Chapman Barry
Original Assignee
Btg Int Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Btg Int Ltd filed Critical Btg Int Ltd
Publication of HK1046310A1 publication Critical patent/HK1046310A1/zh

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
    • 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
    • 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)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
HK02107905.7A 1999-10-20 2002-10-31 永久磁體和磁場調節片設計 HK1046310A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9924833.8A GB9924833D0 (en) 1999-10-20 1999-10-20 Permanent magnet and shim design
PCT/GB2000/003905 WO2001029570A1 (en) 1999-10-20 2000-10-11 Permanent magnet and shim design

Publications (1)

Publication Number Publication Date
HK1046310A1 true HK1046310A1 (zh) 2003-01-03

Family

ID=10863069

Family Applications (1)

Application Number Title Priority Date Filing Date
HK02107905.7A HK1046310A1 (zh) 1999-10-20 2002-10-31 永久磁體和磁場調節片設計

Country Status (8)

Country Link
US (1) US6946940B2 (zh)
EP (1) EP1252530A1 (zh)
JP (1) JP2003512629A (zh)
CN (1) CN1411558A (zh)
AU (1) AU7803200A (zh)
GB (1) GB9924833D0 (zh)
HK (1) HK1046310A1 (zh)
WO (1) WO2001029570A1 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005531937A (ja) * 2001-09-27 2005-10-20 テラパルス， インコーポレイテッド 光伝送媒体における伝送ひずみのより高次の補償を行うための方法と装置
WO2003087741A1 (en) * 2002-04-10 2003-10-23 Terapulse, Inc. Optical signal-to-noise monitor having increased coherence
US6819108B2 (en) * 2003-03-21 2004-11-16 General Electric Company Method of magnetic field controlled shimming
JP4965426B2 (ja) * 2004-03-03 2012-07-04 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 磁気共鳴イメージングシステムのための非対称の非常に短い勾配コイル
WO2007084399A2 (en) * 2006-01-13 2007-07-26 Yale University Mri involving subject-specific diamagnetic and paramagnetic passive shimming
US8547627B2 (en) 2010-11-15 2013-10-01 DigitalOptics Corporation MEMS Electrical routing
EP3145402A4 (en) * 2014-05-20 2018-03-07 The Medical College of Wisconsin, Inc. System and method for fabricating electromagnetic field enhancing objects for magnetic resonance imaging
CN105513745B (zh) * 2016-01-28 2018-04-06 合肥联宝信息技术有限公司 一种磁体组件的布局方法及一种磁性开关
CA3123142A1 (en) 2016-03-22 2017-09-28 Hyperfine Research, Inc. Methods and apparatus for magnetic field shimming
CN106219484A (zh) * 2016-08-09 2016-12-14 电子科技大学 一种磁性各向异性可控的纳米颗粒自组装阵列的制备方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4853663A (en) * 1988-12-22 1989-08-01 General Electric Company Passive shims for correction of (3,2) and (3,-2) harmonic terms in magnetic resonance magnets
US5168232A (en) * 1990-06-29 1992-12-01 General Electric Company Method for rapid magnet shimming
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
US5055812A (en) * 1990-09-24 1991-10-08 The United States Of America As Represented By The Secretary Of The Army. Compensation for magnetic nonuniformities of permanent magnet structures
US5266913A (en) * 1991-08-27 1993-11-30 British Technology Group Usa Inc. Screened electromagnetic coil of restricted length having optimized field and method
US5351006A (en) * 1992-02-07 1994-09-27 Board Of Trustees Of The Leland Stanford Junior University Method and apparatus for correcting spatial distortion in magnetic resonance images due to magnetic field inhomogeneity including inhomogeneity due to susceptibility variations
JP2580537B2 (ja) * 1994-06-27 1997-02-12 工業技術院長 シリカ球状粒子からなる三次元網状構造体
US5532597A (en) * 1994-11-04 1996-07-02 Picker International, Inc. Passive shimming technique for MRI magnets
US6294972B1 (en) * 2000-08-03 2001-09-25 The Mcw Research Foundation, Inc. Method for shimming a static magnetic field in a local MRI coil

Also Published As

Publication number Publication date
WO2001029570A1 (en) 2001-04-26
AU7803200A (en) 2001-04-30
GB9924833D0 (en) 1999-12-22
US20040183636A1 (en) 2004-09-23
EP1252530A1 (en) 2002-10-30
JP2003512629A (ja) 2003-04-02
US6946940B2 (en) 2005-09-20
CN1411558A (zh) 2003-04-16

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