WO2001055732A3 - Permanent magnet arrangement with backplate - Google Patents

Permanent magnet arrangement with backplate Download PDF

Info

Publication number
WO2001055732A3
WO2001055732A3 PCT/IB2001/000090 IB0100090W WO0155732A3 WO 2001055732 A3 WO2001055732 A3 WO 2001055732A3 IB 0100090 W IB0100090 W IB 0100090W WO 0155732 A3 WO0155732 A3 WO 0155732A3
Authority
WO
WIPO (PCT)
Prior art keywords
magnet arrangements
blocks
permanent magnet
backplate
magnetic field
Prior art date
Application number
PCT/IB2001/000090
Other languages
French (fr)
Other versions
WO2001055732A2 (en
Inventor
Uri Rapoport
Original Assignee
Uri Rapoport
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 Uri Rapoport filed Critical Uri Rapoport
Priority to AU28727/01A priority Critical patent/AU2872701A/en
Publication of WO2001055732A2 publication Critical patent/WO2001055732A2/en
Publication of WO2001055732A3 publication Critical patent/WO2001055732A3/en

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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

Apparatus and method for the adjustment of a magnetic field produced by permanent magnet arrangements (68, 70) facing each other across an air gap (72) include a series of ferromagnetic shim blocks individually adjustably positioned within the magnet arrangements to adjust the strength and uniformity of the magnetic field. A backing plate (76, 90) to which the permanent magnets are attached has channels within which adjusting elements are used to move the shim blocks with relation to the permanent magnets, preferably toward or away from the air gap. Shim blocks are arranged in selected geometric arrays and shapes responsive to the geometry of the magnet arrangements and may be formed as a toroidal shapes or as individual blocks of varying sizes.
PCT/IB2001/000090 2000-01-25 2001-01-25 Permanent magnet arrangement with backplate WO2001055732A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU28727/01A AU2872701A (en) 2000-01-25 2001-01-25 Field adjusting mechanisms and methods for permanent magnet arrangement with backplate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17795800P 2000-01-25 2000-01-25
US60/177,958 2000-01-25

Publications (2)

Publication Number Publication Date
WO2001055732A2 WO2001055732A2 (en) 2001-08-02
WO2001055732A3 true WO2001055732A3 (en) 2002-05-23

Family

ID=22650618

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2001/000090 WO2001055732A2 (en) 2000-01-25 2001-01-25 Permanent magnet arrangement with backplate

Country Status (2)

Country Link
AU (1) AU2872701A (en)
WO (1) WO2001055732A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3987686B2 (en) * 2001-02-02 2007-10-10 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー Static magnetic field correction method and MRI apparatus
US6984982B2 (en) 2002-07-29 2006-01-10 Ge Medical Systems Global Technology Company Llc Method and system for shimming an MRI magnet assembly
BR112014019660A8 (en) * 2012-02-10 2017-07-11 Nanalysis Corp POLO PIECE
WO2014007122A1 (en) 2012-07-02 2014-01-09 日立金属株式会社 Magnetic circuit
CN107137822B (en) * 2017-06-23 2023-07-07 和也健康科技有限公司 Magnetic field position self-adjusting mechanism for permanent magnet magnetic therapy mattress
DE102018111246A1 (en) 2018-05-09 2019-11-14 Umicore Ag & Co. Kg Method for coating a wall-flow filter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679022A (en) * 1985-12-27 1987-07-07 Sumitomo Special Metal Co. Ltd. Magnetic field generating device for NMR-CT
US6147578A (en) * 1998-02-09 2000-11-14 Odin Technologies Ltd. Method for designing open magnets and open magnetic apparatus for use in MRI/MRT probes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679022A (en) * 1985-12-27 1987-07-07 Sumitomo Special Metal Co. Ltd. Magnetic field generating device for NMR-CT
US6147578A (en) * 1998-02-09 2000-11-14 Odin Technologies Ltd. Method for designing open magnets and open magnetic apparatus for use in MRI/MRT probes

Also Published As

Publication number Publication date
WO2001055732A2 (en) 2001-08-02
AU2872701A (en) 2001-08-07

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