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WO2011161629A8 - Gradient coil assembly for mri - Google Patents

Gradient coil assembly for mri Download PDF

Info

Publication number
WO2011161629A8
WO2011161629A8 PCT/IB2011/052731 IB2011052731W WO2011161629A8 WO 2011161629 A8 WO2011161629 A8 WO 2011161629A8 IB 2011052731 W IB2011052731 W IB 2011052731W WO 2011161629 A8 WO2011161629 A8 WO 2011161629A8
Authority
WO
WIPO (PCT)
Prior art keywords
gradient coil
coil assembly
carrier
mri
shield
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.)
Ceased
Application number
PCT/IB2011/052731
Other languages
French (fr)
Other versions
WO2011161629A1 (en
Inventor
Gerardus Bernardus Jozef Mulder
Cornelis Leonardus Gerardus Ham
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of WO2011161629A1 publication Critical patent/WO2011161629A1/en
Publication of WO2011161629A8 publication Critical patent/WO2011161629A8/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
    • 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
    • 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
    • G01R33/422—Screening of the radio frequency field

Landscapes

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

Abstract

A magnetic field gradient coil assembly (100) for a magnetic resonance imaging system (300), wherein the magnetic field gradient coil assembly comprises: a carrier (102) with an inner surface (106) and an outer surface (104), wherein the inner surface forms a subject volume (108) adapted for receiving a subject (306); - a shield coil (112) attached to the outer surface; a gradient coil (114) attached to the inner surface; and a shim channel (116) through the carrier for receiving a shim rail (302, 400, 500) within the carrier and located between the shield coil and the gradient coil, wherein the shim channel comprises a radio frequency shield (118) adapted for shielding radio frequency emissions originating from the shim channel.
PCT/IB2011/052731 2010-06-24 2011-06-22 Magnetic field gradient coil assembly Ceased WO2011161629A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10167174.1 2010-06-24
EP10167174 2010-06-24

Publications (2)

Publication Number Publication Date
WO2011161629A1 WO2011161629A1 (en) 2011-12-29
WO2011161629A8 true WO2011161629A8 (en) 2012-08-02

Family

ID=44504009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2011/052731 Ceased WO2011161629A1 (en) 2010-06-24 2011-06-22 Magnetic field gradient coil assembly

Country Status (1)

Country Link
WO (1) WO2011161629A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4053579A1 (en) * 2020-04-17 2022-09-07 Siemens Healthcare GmbH Magnet system with decoupled gradient coils for a magnetic resonance imaging system
CN114259221B (en) * 2021-11-29 2024-11-01 深圳航天科技创新研究院 Movable electromagnetic shielding-free magnetic resonance imaging device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803433A (en) * 1987-12-21 1989-02-07 Montefiore Hospital Association Of Western Pennsylvania, Inc. Method and apparatus for shimming tubular supermagnets
DE10114319C2 (en) * 2001-03-23 2003-02-13 Siemens Ag Shim device for a magnetic resonance device
JP2007510452A (en) * 2003-11-05 2007-04-26 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 MRI system with reduced acoustic noise
DE10352381B4 (en) * 2003-11-10 2009-07-30 Siemens Ag Producer of time-variable magnetic fields of a magnetic resonance apparatus and magnetic resonance apparatus with the producer
DE102005020378B4 (en) 2005-05-02 2010-01-07 Siemens Ag Graded-coil magnetic resonance device with integrated passive shim devices
US7511502B2 (en) * 2007-01-05 2009-03-31 Kabushiki Kaisha Toshiba Magnetic resonance imaging apparatus
DE102007047023A1 (en) * 2007-10-01 2009-01-22 Siemens Ag Magnetic resonance apparatus, with a scanning tunnel for the patient, has a shim iron to act on the main magnet generating the static magnetic field

Also Published As

Publication number Publication date
WO2011161629A1 (en) 2011-12-29

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