BR112015001332A2 - sistema de aquisição de imagem por ressonância magnética, amplificador de gradiente para prover corrente para uma bobina de gradiente de um sistema de aquisição de imagem por ressonância magnética, método para prover corrente para uma bobina de gradiente, e, produto de programa de computador - Google Patents

sistema de aquisição de imagem por ressonância magnética, amplificador de gradiente para prover corrente para uma bobina de gradiente de um sistema de aquisição de imagem por ressonância magnética, método para prover corrente para uma bobina de gradiente, e, produto de programa de computador

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Publication number
BR112015001332A2
BR112015001332A2 BR112015001332A BR112015001332A BR112015001332A2 BR 112015001332 A2 BR112015001332 A2 BR 112015001332A2 BR 112015001332 A BR112015001332 A BR 112015001332A BR 112015001332 A BR112015001332 A BR 112015001332A BR 112015001332 A2 BR112015001332 A2 BR 112015001332A2
Authority
BR
Brazil
Prior art keywords
imaging system
magnetic resonance
resonance imaging
gradient
gradient coil
Prior art date
Application number
BR112015001332A
Other languages
English (en)
Inventor
Leonardus Gerardus Ham Cornelis
Original Assignee
Koninklijke Philips 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 Nv filed Critical Koninklijke Philips Nv
Publication of BR112015001332A2 publication Critical patent/BR112015001332A2/pt

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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
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3671—Electrical details, e.g. matching or coupling of the coil to the receiver involving modulation of the quality factor of the RF coil
    • 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
    • G01R33/3852—Gradient amplifiers; means for controlling the application of a gradient magnetic field to the sample, e.g. a gradient signal synthesizer
    • 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
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • G01R33/3614—RF power amplifiers
    • 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

Landscapes

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

Abstract

resumo sistema de aquisição de imagem por ressonância magnética, amplificador de gradiente para prover corrente para uma bobina de gradiente de um sistema de aquisição de imagem por ressonância magnética, método para prover corrente para uma bobina de gradiente, e, produto de programa de computador a presente invenção refere-se a um método para prover corrente para uma bobina de gradiente (107, 207) de um sistema de aquisição de imagem por ressonância magnética (100) por meio de um amplificador de gradiente (222), o método compreendendo: provisão, por meio de uma fonte de energia elétrica (241), de uma tensão no primeiro nível para a saída do amplificador de gradiente na bobina de gradiente (107, 207) para produzir um campo de gradiente magnético em uma taxa de variação, em que a taxa de variação é estabelecida em um primeiro valor, restabelecimento da taxa de variação para o primeiro valor, e ajuste da tensão em um segundo nível se o segundo valor é diferente do primeiro valor. 1/1
BR112015001332A 2012-07-25 2013-07-24 sistema de aquisição de imagem por ressonância magnética, amplificador de gradiente para prover corrente para uma bobina de gradiente de um sistema de aquisição de imagem por ressonância magnética, método para prover corrente para uma bobina de gradiente, e, produto de programa de computador BR112015001332A2 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261675364P 2012-07-25 2012-07-25
PCT/IB2013/056050 WO2014016774A1 (en) 2012-07-25 2013-07-24 Mri gradient amplifier operable at different slew rates

Publications (1)

Publication Number Publication Date
BR112015001332A2 true BR112015001332A2 (pt) 2017-07-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
BR112015001332A BR112015001332A2 (pt) 2012-07-25 2013-07-24 sistema de aquisição de imagem por ressonância magnética, amplificador de gradiente para prover corrente para uma bobina de gradiente de um sistema de aquisição de imagem por ressonância magnética, método para prover corrente para uma bobina de gradiente, e, produto de programa de computador

Country Status (7)

Country Link
US (1) US10024935B2 (pt)
EP (1) EP2877868A1 (pt)
JP (1) JP6317741B2 (pt)
CN (1) CN104583793B (pt)
BR (1) BR112015001332A2 (pt)
RU (1) RU2626026C2 (pt)
WO (1) WO2014016774A1 (pt)

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US10371771B2 (en) * 2014-07-30 2019-08-06 Koninklijke Philips N.V. Gradient amplifier system for driving a gradient coil and configuration method
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Also Published As

Publication number Publication date
EP2877868A1 (en) 2015-06-03
CN104583793A (zh) 2015-04-29
US10024935B2 (en) 2018-07-17
JP2015526166A (ja) 2015-09-10
US20150177345A1 (en) 2015-06-25
JP6317741B2 (ja) 2018-04-25
RU2015106140A (ru) 2016-09-20
WO2014016774A1 (en) 2014-01-30
CN104583793B (zh) 2019-07-16
RU2626026C2 (ru) 2017-07-21

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Legal Events

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B06F Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]
B06U Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 8A ANUIDADE.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: EM VIRTUDE DO ARQUIVAMENTO PUBLICADO NA RPI 2629 DE 25-05-2021 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDO O ARQUIVAMENTO DO PEDIDO DE PATENTE, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.