DE68926102D1 - Permanentmagnetanordnung - Google Patents

Permanentmagnetanordnung

Info

Publication number
DE68926102D1
DE68926102D1 DE68926102T DE68926102T DE68926102D1 DE 68926102 D1 DE68926102 D1 DE 68926102D1 DE 68926102 T DE68926102 T DE 68926102T DE 68926102 T DE68926102 T DE 68926102T DE 68926102 D1 DE68926102 D1 DE 68926102D1
Authority
DE
Germany
Prior art keywords
magnetic field
magnet
air gap
permanent magnet
pole piece
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
Application number
DE68926102T
Other languages
English (en)
Other versions
DE68926102T2 (de
Inventor
Uri Rapoport
Richard Panosh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualion Ltd
Original Assignee
Advanced Techtronics Inc
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 Advanced Techtronics Inc filed Critical Advanced Techtronics Inc
Application granted granted Critical
Publication of DE68926102D1 publication Critical patent/DE68926102D1/de
Publication of DE68926102T2 publication Critical patent/DE68926102T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—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
    • H01F7/0294—Detection, inspection, magnetic treatment
    • 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
    • G01R33/3875—Compensation of inhomogeneities using correction coil assemblies, e.g. active shimming
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Hard Magnetic Materials (AREA)
DE68926102T 1988-11-29 1989-11-29 Permanentmagnetanordnung Expired - Fee Related DE68926102T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/277,209 US5063934A (en) 1987-10-07 1988-11-29 Permanent magnet arrangement

Publications (2)

Publication Number Publication Date
DE68926102D1 true DE68926102D1 (de) 1996-05-02
DE68926102T2 DE68926102T2 (de) 1996-08-22

Family

ID=23059869

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68926102T Expired - Fee Related DE68926102T2 (de) 1988-11-29 1989-11-29 Permanentmagnetanordnung

Country Status (9)

Country Link
US (1) US5063934A (de)
EP (1) EP0371775B1 (de)
JP (1) JP2729092B2 (de)
KR (1) KR900008553A (de)
AT (1) ATE136153T1 (de)
AU (2) AU4573489A (de)
CA (1) CA2004100C (de)
DE (1) DE68926102T2 (de)
IL (1) IL92448A0 (de)

Families Citing this family (34)

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JPH03131234A (ja) * 1989-07-07 1991-06-04 Sumitomo Special Metals Co Ltd Ｍｒｉ用磁界発生装置
US5285393A (en) * 1991-11-19 1994-02-08 New York University Method for determination of optimum fields of permanent magnet structures with linear magnetic characteristics
JPH05329128A (ja) * 1992-05-29 1993-12-14 Mitsubishi Electric Corp 磁場補正装置
FI93060C (fi) * 1992-07-03 1995-02-10 Picker Nordstar Oy Laitteisto ja menetelmä magneettikuvaukseen
IL106779A0 (en) * 1992-09-11 1993-12-08 Magna Lab Inc Permanent magnetic structure
GB9302837D0 (en) * 1993-02-12 1993-03-31 Oxford Instr Uk Ltd Magnet assembly
GB2276946B (en) * 1993-04-08 1997-04-02 Oxford Magnet Tech Improvements in or relating to MRI magnets
FR2710780B1 (fr) * 1993-09-30 1995-10-27 Commissariat Energie Atomique Structures magnétiques ouvertes.
GB9513544D0 (en) * 1995-07-04 1995-09-06 Marconi Gec Ltd Magnetic resonance methods and apparatus
US5786741A (en) * 1995-12-21 1998-07-28 Aura Systems, Inc. Polygon magnet structure for voice coil actuator
US6842002B2 (en) 2000-01-19 2005-01-11 Millennium Technology, Inc. C-shaped magnetic resonance imaging system
US6662434B2 (en) 2001-04-03 2003-12-16 General Electric Company Method and apparatus for magnetizing a permanent magnet
US6518867B2 (en) 2001-04-03 2003-02-11 General Electric Company Permanent magnet assembly and method of making thereof
GB0211516D0 (en) * 2002-05-20 2002-06-26 Univ Sheffield Method and apparatus for magnetic resonance imaging
US7148689B2 (en) 2003-09-29 2006-12-12 General Electric Company Permanent magnet assembly with movable permanent body for main magnetic field adjustable
US7423431B2 (en) * 2003-09-29 2008-09-09 General Electric Company Multiple ring polefaceless permanent magnet and method of making
CN100418475C (zh) * 2004-07-01 2008-09-17 日立金属株式会社 磁场产生装置
US7400147B2 (en) * 2005-11-03 2008-07-15 Uri Rapoport Self-fastening cage surrounding a magnetic resonance device and methods thereof
CN102360698B (zh) * 2005-12-01 2014-11-12 传感电子公司 具有开放访问的磁性拆卸器
WO2007064339A1 (en) * 2005-12-01 2007-06-07 Sensormatic Electronics Corporation Magnetic detacher with open access
CN102310384B (zh) * 2005-12-01 2015-08-19 传感电子公司 具有开放访问的磁性拆卸器
US7391327B2 (en) * 2005-12-01 2008-06-24 Sensormatic Electronics Corporation Magnetic detacher with open access
US10264993B2 (en) * 2007-06-21 2019-04-23 Rf Science & Technology Inc. Sample scanning and analysis system and methods for using the same
US8647272B2 (en) * 2007-06-21 2014-02-11 Rf Science & Technology Inc Non-invasive scanning apparatuses
US8259299B2 (en) 2007-06-21 2012-09-04 Rf Science & Technology Inc. Gas scanning and analysis
US8647273B2 (en) * 2007-06-21 2014-02-11 RF Science & Technology, Inc. Non-invasive weight and performance management
US8382668B2 (en) * 2007-06-21 2013-02-26 Rf Science & Technology Inc. Non-invasive determination of characteristics of a sample
WO2011066652A1 (en) * 2009-12-02 2011-06-09 Nanalysis Corp. Method and apparatus for producing homogeneous magnetic fields
US9562989B2 (en) * 2011-06-07 2017-02-07 Halliburton Energy Services, Inc. Rotational indexing to optimize sensing volume of a nuclear magnetic resonance logging tool
US20130081653A1 (en) * 2011-10-04 2013-04-04 Theodosios Kountotsis System and method for tube cleaning
GR1008053B (el) * 2012-03-13 2013-12-09 Γεωργιος Κωνσταντινου Κερτσοπουλος Μαγνητικο συστημα συγκροτημενων κατασκευων μαγνητικης συσκευης με πρωτοεμφανιζομενες πολικες και πεδιακες ιδιοτητες και μεθοδος παραγωγης τους
DE102020122176A1 (de) 2020-08-25 2022-03-03 Carl Zeiss Ag Magnetfeldvorrichtung und Mikroskop
US11597645B2 (en) 2020-08-28 2023-03-07 Opw Fueling Components, Llc Breakaway assembly
US11603954B2 (en) 2020-08-28 2023-03-14 Opw Fueling Components, Llc Breakaway assembly

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB869426A (en) * 1957-10-21 1961-05-31 Fairey Co Ltd Nuclear magnetic resonance detectors
US3611223A (en) * 1968-09-11 1971-10-05 Hitachi Ltd Magnetic apparatus for producing homogeneous field
JPS5535729B1 (de) * 1971-07-10 1980-09-16
JPS5625613B2 (de) * 1974-03-13 1981-06-13
JPS50151304A (de) * 1974-05-29 1975-12-05
SU519661A1 (ru) * 1974-07-17 1976-06-30 Ленинградский Ордена Трудового Красного Знамени Технологический Институт Им.Ленсовета Магнитна система
JPS6051056B2 (ja) * 1980-06-13 1985-11-12 株式会社東芝 核磁気共鳴装置
US4379294A (en) * 1981-02-12 1983-04-05 Electric Power Research Institute, Inc. Data highway access control system
IT1171588B (it) * 1981-10-14 1987-06-10 Cnen Apparecchiatura per generare intensi campi magnetici quasi-stazionari con geometria toroidale/compatta
GB2112645B (en) * 1981-12-24 1985-07-31 Eizo Nishino Magnetic medical appliance
EP0114889A1 (de) * 1982-08-04 1984-08-08 OLDENDORF, William H. Einstellbarer magnet geeignet zur in vivo nmr-bildaufnahme und verfahren zum einstellen desselben
EP0161782B1 (de) * 1984-04-11 1988-11-09 Sumitomo Special Metal Co., Ltd. Eine ein Magnetfeld erzeugende Vorrichtung für NMR-CT
DE3418812A1 (de) * 1984-05-19 1985-11-21 Bruker Medizintechnik Gmbh, 7512 Rheinstetten Kernspintomograph
NL8402249A (nl) * 1984-07-17 1986-02-17 Philips Nv Kernspin resonantie apparaat met een permanente magnetische magneet.
US4605911A (en) * 1984-10-24 1986-08-12 The United States Of America As Represented By The Secretary Of The Air Force Magnetic bias and delay linearity in a magnetostatic wave delay line
US4682111A (en) * 1985-03-05 1987-07-21 Kabushiki Kaisha Toshiba Magnetic resonance imaging magnet
US4791370A (en) * 1985-08-23 1988-12-13 Resonex, Inc. Gradient field structure and method for use with magnetic resonance imaging apparatus
JPS62139304A (ja) * 1985-12-13 1987-06-23 Hitachi Metals Ltd 磁界均一性のよい磁気回路
US4679022A (en) * 1985-12-27 1987-07-07 Sumitomo Special Metal Co. Ltd. Magnetic field generating device for NMR-CT
JPH079845B2 (ja) * 1986-01-31 1995-02-01 富士電機株式会社 永久磁石形均一磁場マグネット
DE3616078A1 (de) * 1986-05-13 1987-11-19 Bruker Analytische Messtechnik Elektromagnetsystem fuer die kernspintomographie
DE3779715T2 (de) * 1986-09-27 1993-01-28 Sumitomo Spec Metals Vorrichtung zur erzeugung eines magnetfeldes fuer rechnergesteuerte tomographie mittels magnetischer kernresonanz.
FR2611975B1 (fr) * 1987-03-03 1995-02-17 Commissariat Energie Atomique Systeme d'aimants permanents pour un champ magnetique intense
US4862086A (en) * 1987-04-28 1989-08-29 Kabushiki Kaisha Toshiba System for generating magnetic fields utilized for magnetic resonance imaging apparatus
US4794338A (en) * 1987-11-25 1988-12-27 General Electric Company Balanced self-shielded gradient coils

Also Published As

Publication number Publication date
EP0371775A2 (de) 1990-06-06
DE68926102T2 (de) 1996-08-22
US5063934A (en) 1991-11-12
EP0371775B1 (de) 1996-03-27
EP0371775A3 (de) 1991-11-13
AU5490994A (en) 1994-04-21
JP2729092B2 (ja) 1998-03-18
CA2004100A1 (en) 1990-05-29
CA2004100C (en) 1999-11-02
KR900008553A (ko) 1990-06-04
JPH02276211A (ja) 1990-11-13
AU4573489A (en) 1990-06-07
ATE136153T1 (de) 1996-04-15
IL92448A0 (en) 1990-08-31

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: FOXBORO NMR LTD., HAIFA, IL

8339 Ceased/non-payment of the annual fee