AU2019429503B2 - Magnets and magnetic resonance imaging systems - Google Patents

Magnets and magnetic resonance imaging systems

Info

Publication number
AU2019429503B2
AU2019429503B2 AU2019429503A AU2019429503A AU2019429503B2 AU 2019429503 B2 AU2019429503 B2 AU 2019429503B2 AU 2019429503 A AU2019429503 A AU 2019429503A AU 2019429503 A AU2019429503 A AU 2019429503A AU 2019429503 B2 AU2019429503 B2 AU 2019429503B2
Authority
AU
Australia
Prior art keywords
magnet
diameter
bore
primary
coils
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.)
Active
Application number
AU2019429503A
Other languages
English (en)
Other versions
AU2019429503A1 (en
Inventor
Feng Liu
Ewald Weber
Riyu Wei
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.)
Magnetica Ltd
Original Assignee
Magnetica 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
Priority claimed from AU2019900450A external-priority patent/AU2019900450A0/en
Application filed by Magnetica Ltd filed Critical Magnetica Ltd
Publication of AU2019429503A1 publication Critical patent/AU2019429503A1/en
Application granted granted Critical
Publication of AU2019429503B2 publication Critical patent/AU2019429503B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0033—Features or image-related aspects of imaging apparatus, e.g. for MRI, optical tomography or impedance tomography apparatus; Arrangements of imaging apparatus in a room
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/70—Means for positioning the patient in relation to the detecting, measuring or recording means
    • A61B5/704—Tables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/0005—Geometrical arrangement of magnetic sensor elements; Apparatus combining different magnetic sensor types
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/035—Measuring direction or magnitude of magnetic fields or magnetic flux using superconductive devices
    • 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
    • G01R33/30—Sample handling arrangements, e.g. sample cells, spinning mechanisms
    • G01R33/307—Sample handling arrangements, e.g. sample cells, spinning mechanisms specially adapted for moving the sample relative to the MR system, e.g. spinning mechanisms, flow cells or means for positioning the sample inside a spectrometer
    • 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
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field
    • 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
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field
    • G01R33/4215—Screening of main or gradient magnetic field of the gradient magnetic field, e.g. using passive or active shielding of the gradient magnetic field
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/06—Coils, e.g. winding, insulating, terminating or casing arrangements therefor
    • 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
    • G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
    • G01R33/48—NMR imaging systems
    • G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
    • G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
    • G01R33/563—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution of moving material, e.g. flow contrast angiography
    • G01R33/56375—Intentional motion of the sample during MR, e.g. moving table imaging
    • G01R33/56383—Intentional motion of the sample during MR, e.g. moving table imaging involving motion of the sample as a whole, e.g. multistation MR or MR with continuous table motion

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Radiology & Medical Imaging (AREA)
  • Epidemiology (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
AU2019429503A 2019-02-12 2019-11-22 Magnets and magnetic resonance imaging systems Active AU2019429503B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2019900450 2019-02-12
AU2019900450A AU2019900450A0 (en) 2019-02-12 Magnets and magnetic resonance imaging systems
PCT/AU2019/051285 WO2020163892A1 (en) 2019-02-12 2019-11-22 Magnets and magnetic resonance imaging systems

Publications (2)

Publication Number Publication Date
AU2019429503A1 AU2019429503A1 (en) 2021-07-22
AU2019429503B2 true AU2019429503B2 (en) 2025-09-11

Family

ID=72043734

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2019429503A Active AU2019429503B2 (en) 2019-02-12 2019-11-22 Magnets and magnetic resonance imaging systems

Country Status (6)

Country Link
US (1) US11630174B2 (enExample)
EP (1) EP3924744A4 (enExample)
JP (2) JP2022520767A (enExample)
CN (1) CN113366328A (enExample)
AU (1) AU2019429503B2 (enExample)
WO (1) WO2020163892A1 (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2025139B1 (en) * 2020-03-16 2021-10-19 Univ Twente Magnet apparatus and apparatus for magnetic density separation

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307039A (en) * 1992-09-08 1994-04-26 General Electric Company Frustoconical magnet for magnetic resonance imaging
US20060055406A1 (en) * 2004-09-11 2006-03-16 General Electric Company Systems, methods and apparatus for specialized magnetic resonance imaging with dual-access conical bore
US20070018648A1 (en) * 2005-07-19 2007-01-25 Magnetica Limited Multi-layer magnet
US8421463B2 (en) * 2006-10-27 2013-04-16 Nmr Holdings No. 2 Pty Ltd. Magnets for use in magnetic resonance imaging
AU2010336013B2 (en) * 2009-12-21 2014-12-11 Nmr Holdings No. 2 Pty Limited Open-bore magnet for use in magnetic resonance imaging
US20150048832A1 (en) * 2013-08-13 2015-02-19 Samsung Electronics Co., Ltd. Magnetic resonance imaging apparatus and manufacturing method thereof
WO2016025996A1 (en) * 2014-08-18 2016-02-25 Magnetica Limited Magnet for head and extremity imaging
CN103499797B (zh) * 2013-09-09 2016-03-02 中国科学院电工研究所 磁共振成像超导磁体螺线管线圈数目和初始位置获取方法
WO2018174726A2 (en) * 2017-03-24 2018-09-27 Victoria Link Limited Mri magnet and apparatus

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5646532A (en) 1993-09-20 1997-07-08 Bruker Medizintechnik Gmbh Partial body tomograph
US5416415A (en) 1994-08-05 1995-05-16 General Electric Company Over-shoulder MRI magnet for human brain imaging
US5396207A (en) 1994-08-05 1995-03-07 General Electric Company On-shoulder MRI magnet for human brain imaging
US5818319A (en) 1995-12-21 1998-10-06 The University Of Queensland Magnets for magnetic resonance systems
US5801609A (en) 1997-04-25 1998-09-01 General Electric Company MRI head magnet
AUPQ198899A0 (en) 1999-08-03 1999-08-26 University Of Queensland, The A method of magnet design and magnet configuration
US6700468B2 (en) 2000-12-01 2004-03-02 Nmr Holdings No. 2 Pty Limited Asymmetric magnets for magnetic resonance imaging
US7230426B2 (en) * 2003-06-20 2007-06-12 General Electric Company Split-shield gradient coil with improved fringe-field
US7466133B2 (en) * 2005-03-01 2008-12-16 General Electric Company Systems, methods and apparatus of a magnetic resonance imaging system to produce a stray field suitable for interventional use
US7579838B2 (en) * 2005-11-18 2009-08-25 General Electric Company Systems, methods and apparatus for a partially elongated field of view in a magnetic resonance imaging system
JP2007159741A (ja) * 2005-12-12 2007-06-28 Hitachi Ltd 磁気共鳴イメージング装置及び電磁石装置
EP2230530A1 (en) * 2009-03-20 2010-09-22 Koninklijke Philips Electronics N.V. A tesseral shim coil for a magnetic resonance system
JP5752711B2 (ja) * 2010-12-20 2015-07-22 株式会社日立メディコ 静磁場コイル装置および核磁気共鳴撮像装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307039A (en) * 1992-09-08 1994-04-26 General Electric Company Frustoconical magnet for magnetic resonance imaging
US20060055406A1 (en) * 2004-09-11 2006-03-16 General Electric Company Systems, methods and apparatus for specialized magnetic resonance imaging with dual-access conical bore
US20070018648A1 (en) * 2005-07-19 2007-01-25 Magnetica Limited Multi-layer magnet
US8421463B2 (en) * 2006-10-27 2013-04-16 Nmr Holdings No. 2 Pty Ltd. Magnets for use in magnetic resonance imaging
AU2010336013B2 (en) * 2009-12-21 2014-12-11 Nmr Holdings No. 2 Pty Limited Open-bore magnet for use in magnetic resonance imaging
US20150048832A1 (en) * 2013-08-13 2015-02-19 Samsung Electronics Co., Ltd. Magnetic resonance imaging apparatus and manufacturing method thereof
CN103499797B (zh) * 2013-09-09 2016-03-02 中国科学院电工研究所 磁共振成像超导磁体螺线管线圈数目和初始位置获取方法
WO2016025996A1 (en) * 2014-08-18 2016-02-25 Magnetica Limited Magnet for head and extremity imaging
WO2018174726A2 (en) * 2017-03-24 2018-09-27 Victoria Link Limited Mri magnet and apparatus

Also Published As

Publication number Publication date
EP3924744A4 (en) 2023-02-08
AU2019429503A1 (en) 2021-07-22
JP2024063146A (ja) 2024-05-10
US11630174B2 (en) 2023-04-18
JP2022520767A (ja) 2022-04-01
US20220128638A1 (en) 2022-04-28
CN113366328A (zh) 2021-09-07
EP3924744A1 (en) 2021-12-22
WO2020163892A1 (en) 2020-08-20

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