ATE420375T1 - Magnetresonanzabbildungssystem mit eisenunterstütztem magnetfeldgradientensystem - Google Patents

Magnetresonanzabbildungssystem mit eisenunterstütztem magnetfeldgradientensystem

Info

Publication number
ATE420375T1
ATE420375T1 AT05743242T AT05743242T ATE420375T1 AT E420375 T1 ATE420375 T1 AT E420375T1 AT 05743242 T AT05743242 T AT 05743242T AT 05743242 T AT05743242 T AT 05743242T AT E420375 T1 ATE420375 T1 AT E420375T1
Authority
AT
Austria
Prior art keywords
magnetic field
field gradient
resonance imaging
iron
ferromagnetic yoke
Prior art date
Application number
AT05743242T
Other languages
English (en)
Inventor
Johannes Overweg
Original Assignee
Koninkl Philips Electronics Nv
Philips Corp
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 Koninkl Philips Electronics Nv, Philips Corp filed Critical Koninkl Philips Electronics Nv
Application granted granted Critical
Publication of ATE420375T1 publication Critical patent/ATE420375T1/de

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
    • G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
    • G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
    • G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised 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
    • G01R33/38—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
    • G01R33/385—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
    • G01R33/38—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
    • G01R33/3854—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils means for active and/or passive vibration damping or acoustical noise suppression in gradient magnet coil systems
    • 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
    • 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
    • G01R33/565—Correction of image distortions, e.g. due to magnetic field inhomogeneities
    • G01R33/5659—Correction of image distortions, e.g. due to magnetic field inhomogeneities caused by a distortion of the RF magnetic field, e.g. spatial inhomogeneities of the RF 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
    • G01R33/38—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
    • G01R33/3856—Means for cooling the gradient coils or thermal shielding of the gradient coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/02—Cores, Yokes, or armatures made from sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/08—Cores, Yokes, or armatures made from powder
    • 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
    • H01F7/202—Electromagnets for high magnetic field strength

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • General Health & Medical Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Electromagnetism (AREA)
  • Epidemiology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
AT05743242T 2004-06-17 2005-06-02 Magnetresonanzabbildungssystem mit eisenunterstütztem magnetfeldgradientensystem ATE420375T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58057704P 2004-06-17 2004-06-17

Publications (1)

Publication Number Publication Date
ATE420375T1 true ATE420375T1 (de) 2009-01-15

Family

ID=35462199

Family Applications (1)

Application Number Title Priority Date Filing Date
AT05743242T ATE420375T1 (de) 2004-06-17 2005-06-02 Magnetresonanzabbildungssystem mit eisenunterstütztem magnetfeldgradientensystem

Country Status (6)

Country Link
US (1) US7417434B2 (de)
EP (1) EP1761794B8 (de)
CN (1) CN101019036A (de)
AT (1) ATE420375T1 (de)
DE (1) DE602005012265D1 (de)
WO (1) WO2005124381A2 (de)

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WO2007076252A1 (en) * 2005-12-20 2007-07-05 Koninklijke Philips Electronics, N.V. Magnetic resonance scanner with a longitudinal magnetic field gradient system
US8058873B2 (en) 2006-11-10 2011-11-15 Koninklijke Philips Electronics N.V. Prevention quench in a magnetic resonance examination system
JP2010508937A (ja) * 2006-11-10 2010-03-25 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 磁気共鳴検査システムのクエンチ検出
EP2115484A2 (de) 2007-02-26 2009-11-11 Koninklijke Philips Electronics N.V. Sinusiod resonante funkfrequenzvolumenspulen für hochfeld-magnetresonanzanwendungen
JP5461199B2 (ja) 2007-02-26 2014-04-02 コーニンクレッカ フィリップス エヌ ヴェ 磁気共鳴用の二重共振高磁場無線周波数表面コイル
WO2009081361A1 (en) 2007-12-21 2009-07-02 Koninklijke Philips Electronics N.V. Electromagnet with laminated ferromagnetic core and superconducting film for. suppressing eddy magnetic field
RU2496125C2 (ru) 2008-02-25 2013-10-20 Конинклейке Филипс Электроникс Н.В. Передающая среда для детекторов излучения, расположенная в изометрической плоскости
WO2009150576A1 (en) * 2008-06-10 2009-12-17 Koninklijke Philips Electronics N.V. Cryocooling system for mri providing reduced artifacts caused by vibrations
WO2010071921A1 (en) * 2008-12-22 2010-07-01 The University Of Queensland Gradient coil arrangement
RU2572650C2 (ru) * 2009-04-17 2016-01-20 Тайм Медикал Холдингз Компани Лимитед Модуль с градиентными катушками из сверхпроводника с криогенным охлаждением для магнитно-резонансной томографии
WO2012153712A1 (ja) * 2011-05-10 2012-11-15 株式会社 東芝 磁気共鳴イメージング装置、磁気共鳴イメージング装置用の磁場調整具、磁気共鳴イメージング方法及び磁気共鳴イメージング装置の磁場調整方法
JP5932815B2 (ja) * 2011-09-30 2016-06-08 株式会社日立メディコ 磁気共鳴イメージング装置
CN103713268B (zh) * 2012-09-29 2016-05-18 上海联影医疗科技有限公司 一种具有辅助匀场线圈的磁共振系统及匀场方法
DE102012221918B3 (de) * 2012-11-29 2014-02-13 Siemens Aktiengesellschaft Anordnung zur Erzeugung des Hauptmagnetfeldes und des Gradientenmagnetfeldes einer Magnetresonanztomografieanlage, Magnetresonanztomografieanlage und Verfahren zum Betrieb einer Magnetresonanztomografieanlage
US9404983B2 (en) * 2013-03-12 2016-08-02 Viewray, Incorporated Radio frequency transmit coil for magnetic resonance imaging system
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WO2016195281A1 (ko) * 2015-05-21 2016-12-08 아탈라에르긴 경사자장을 발생시키기 위해 복수의 코일을 이용하는 경사자장 발생 모듈
US10571537B2 (en) 2015-05-21 2020-02-25 Bilkent University Multi-purpose gradient array for magnetic resonance imaging
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WO2018033548A1 (en) 2016-08-15 2018-02-22 Koninklijke Philips N.V. Actively shielded gradient coil assembly for a magnetic resonance examination system
WO2018186815A1 (en) 2017-04-06 2018-10-11 İhsan Doğramaci Bi̇lkent Üni̇versi̇tesi̇ Minimization of current ripples in a gradient array system by applying an optimum-phase shift pulse width modulation pattern
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Also Published As

Publication number Publication date
CN101019036A (zh) 2007-08-15
DE602005012265D1 (de) 2009-02-26
EP1761794A2 (de) 2007-03-14
US7417434B2 (en) 2008-08-26
WO2005124381A8 (en) 2007-04-19
WO2005124381A3 (en) 2006-08-17
EP1761794B8 (de) 2009-06-10
WO2005124381A2 (en) 2005-12-29
US20070216409A1 (en) 2007-09-20
EP1761794B1 (de) 2009-01-07

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