GB2219406B - Electromagnet apparatus - Google Patents

Electromagnet apparatus

Info

Publication number
GB2219406B
GB2219406B GB8907717A GB8907717A GB2219406B GB 2219406 B GB2219406 B GB 2219406B GB 8907717 A GB8907717 A GB 8907717A GB 8907717 A GB8907717 A GB 8907717A GB 2219406 B GB2219406 B GB 2219406B
Authority
GB
United Kingdom
Prior art keywords
electromagnet apparatus
electromagnet
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 - Lifetime
Application number
GB8907717A
Other versions
GB8907717D0 (en
GB2219406A (en
Inventor
Rory John Warner
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.)
Magnex Scientific Ltd
Original Assignee
Magnex Scientific 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 Magnex Scientific Ltd filed Critical Magnex Scientific Ltd
Publication of GB8907717D0 publication Critical patent/GB8907717D0/en
Publication of GB2219406A publication Critical patent/GB2219406A/en
Application granted granted Critical
Publication of GB2219406B publication Critical patent/GB2219406B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures
    • 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
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • 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
    • G01R33/389—Field stabilisation, e.g. by field measurements and control means or indirectly by current stabilisation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
GB8907717A 1988-04-08 1989-04-05 Electromagnet apparatus Expired - Lifetime GB2219406B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888808334A GB8808334D0 (en) 1988-04-08 1988-04-08 Electromagnets

Publications (3)

Publication Number Publication Date
GB8907717D0 GB8907717D0 (en) 1989-05-17
GB2219406A GB2219406A (en) 1989-12-06
GB2219406B true GB2219406B (en) 1993-04-07

Family

ID=10634861

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888808334A Pending GB8808334D0 (en) 1988-04-08 1988-04-08 Electromagnets
GB8907717A Expired - Lifetime GB2219406B (en) 1988-04-08 1989-04-05 Electromagnet apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888808334A Pending GB8808334D0 (en) 1988-04-08 1988-04-08 Electromagnets

Country Status (1)

Country Link
GB (2) GB8808334D0 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009510477A (en) * 2005-10-03 2009-03-12 マサチューセッツ・インスティチュート・オブ・テクノロジー A system using ring magnets to obtain magnetic resonance spectra.

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2667948B1 (en) * 1990-10-12 1993-04-16 Magnetech MAGNETIC SYSTEM WITH HOMOGENEOUS FIELD OF HIGH ACCESSIBILITY.
GB9407309D0 (en) * 1994-04-13 1994-06-08 Oxford Magnet Tech Improvements in or relating to magnetic resonance imaging apparatus
US5463364A (en) * 1994-04-13 1995-10-31 Bruker Analytische Messtechnik Gmbh Magnet system for NMR tomography
DE4412755C2 (en) * 1994-04-13 1996-09-05 Bruker Analytische Messtechnik Magnetic system for NMR tomography
US5696476A (en) * 1995-07-31 1997-12-09 General Electric Company Open architecture magnetic resonance imaging superconducting magnet assembly
JP3663262B2 (en) * 1995-10-23 2005-06-22 ゼネラル・エレクトリック・カンパニイ Open magnetic resonance imaging magnet
EP1078274A1 (en) 1999-03-10 2001-02-28 Koninklijke Philips Electronics N.V. Method of and device for the compensation of variations of the main magnetic field during magnetic resonance imaging
JP3781166B2 (en) * 1999-03-26 2006-05-31 株式会社日立メディコ Magnetic resonance imaging apparatus and static magnetic field uniformity maintaining method
DE10208482B4 (en) * 2002-02-27 2004-01-15 Siemens Ag Magnetic resonance device with a coil system with current control that is specific to the heat given off
US6788060B1 (en) * 2003-05-28 2004-09-07 Ge Medical Systems Global Technology Co., Inc. Imaging system with homogeneous magnetic field
EP3475718A1 (en) 2016-06-22 2019-05-01 ViewRay Technologies, Inc. Magnetic resonance imaging at low field strength
US11209509B2 (en) 2018-05-16 2021-12-28 Viewray Technologies, Inc. Resistive electromagnet systems and methods

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2027208A (en) * 1978-08-05 1980-02-13 Emi Ltd Magnetic field correction in NMR apparatus
GB2125632A (en) * 1982-08-09 1984-03-07 Varian Associates Improved method for superconducting magnet shimming
EP0216404A1 (en) * 1985-08-26 1987-04-01 Koninklijke Philips Electronics N.V. Magnetic resonance imaging apparatus including-homogenizing magnetic elements
US4663592A (en) * 1984-06-27 1987-05-05 Yokogawa Hokushin Electric Corporation NMR image forming apparatus
GB2184243A (en) * 1985-12-09 1987-06-17 Picker Int Ltd Electromagnet arrangements
EP0242734A2 (en) * 1986-04-23 1987-10-28 Bruker Analytische Messtechnik GmbH Method and device for cooling a resistive magnetic system for nuclear magnetic resonance tomographs

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2027208A (en) * 1978-08-05 1980-02-13 Emi Ltd Magnetic field correction in NMR apparatus
GB2125632A (en) * 1982-08-09 1984-03-07 Varian Associates Improved method for superconducting magnet shimming
US4663592A (en) * 1984-06-27 1987-05-05 Yokogawa Hokushin Electric Corporation NMR image forming apparatus
EP0216404A1 (en) * 1985-08-26 1987-04-01 Koninklijke Philips Electronics N.V. Magnetic resonance imaging apparatus including-homogenizing magnetic elements
GB2184243A (en) * 1985-12-09 1987-06-17 Picker Int Ltd Electromagnet arrangements
EP0242734A2 (en) * 1986-04-23 1987-10-28 Bruker Analytische Messtechnik GmbH Method and device for cooling a resistive magnetic system for nuclear magnetic resonance tomographs
US4780676A (en) * 1986-04-23 1988-10-25 Mueller Wolfgang Method and device for cooling a resistive magnet system for nuclear spin tomographs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Magnetic Resonance in Medicine 1 (1984) 44-65 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009510477A (en) * 2005-10-03 2009-03-12 マサチューセッツ・インスティチュート・オブ・テクノロジー A system using ring magnets to obtain magnetic resonance spectra.

Also Published As

Publication number Publication date
GB8808334D0 (en) 1988-05-11
GB8907717D0 (en) 1989-05-17
GB2219406A (en) 1989-12-06

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20090404