BR112015008810A2 - sistema e método de imageamento por ressonância magnética - Google Patents

sistema e método de imageamento por ressonância magnética

Info

Publication number
BR112015008810A2
BR112015008810A2 BR112015008810A BR112015008810A BR112015008810A2 BR 112015008810 A2 BR112015008810 A2 BR 112015008810A2 BR 112015008810 A BR112015008810 A BR 112015008810A BR 112015008810 A BR112015008810 A BR 112015008810A BR 112015008810 A2 BR112015008810 A2 BR 112015008810A2
Authority
BR
Brazil
Prior art keywords
sar
power
unit
transmitted
magnetic resonance
Prior art date
Application number
BR112015008810A
Other languages
English (en)
Inventor
Andrew Morich Michael
Zhai Zhiyong
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 BR112015008810A2 publication Critical patent/BR112015008810A2/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
    • G01R33/44—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
    • G01R33/543—Control of the operation of the MR system, e.g. setting of acquisition parameters prior to or during MR data acquisition, dynamic shimming, use of one or more scout images for scan plane prescription
    • 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
    • G01R33/288—Provisions within MR facilities for enhancing safety during MR, e.g. reduction of the specific absorption rate [SAR], detection of ferromagnetic objects in the scanner room
    • 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]
    • G01R33/443—Assessment of an electric or a magnetic field, e.g. spatial mapping, determination of a B0 drift or dosimetry
    • 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
    • G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
    • G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency
    • 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
    • G01R33/58—Calibration of imaging systems, e.g. using test probes, Phantoms; Calibration objects or fiducial markers such as active or passive RF coils surrounding an MR active material
    • G01R33/583—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency
    • G01R33/586—Calibration of signal excitation or detection systems, e.g. for optimal RF excitation power or frequency for optimal flip angle of RF pulses

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

resumo sistema e método de imageamento por ressonância magnética a presente invenção refere-se a um sistema de ressonância magnética (1) que inclui ao menos uma bobina de transmissão de radiofrequência (rf) (6), um transmissor de rf (34), uma unidade antropométrica (28) e uma unidade sar adaptável (40). a pelo menos uma bobina de transmissão de radiofrequência (rf) (6) transmite uma potência de rf medida para excitar e manipular a ressonância magnética em tecidos de um indivíduo (57) em uma região de exame. o transmissor de rf (34) controla a quantidade de potência de rf transmitida com base de uma taxa de absorção específica (sar - specific absorption rate) para uma sequência de imageamento. a unidade antropométrica (28) determina uma massa de uma porção do indivíduo que recebe a potência de rf transmitida com base na massa total determinada. a unidade sar adaptável (40) ajusta uma sequência de varredura selecionada com base nos parâmetros sar determinados a partir da potência de rf transmitida medida e de uma potência refletida medida, do campo |b1+| obtido, da massa da porção do indivíduo que recebe a potência de rf transmitida e dos modelos do parâmetro sar aplicáveis armazenados em uma unidade de referência de sar (48). 1/1
BR112015008810A 2012-10-23 2013-09-17 sistema e método de imageamento por ressonância magnética BR112015008810A2 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261717164P 2012-10-23 2012-10-23
PCT/IB2013/058587 WO2014064553A1 (en) 2012-10-23 2013-09-17 Adaptive specific absorption rate (sar) control for magnetic resonance imaging

Publications (1)

Publication Number Publication Date
BR112015008810A2 true BR112015008810A2 (pt) 2017-07-04

Family

ID=49709773

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112015008810A BR112015008810A2 (pt) 2012-10-23 2013-09-17 sistema e método de imageamento por ressonância magnética

Country Status (8)

Country Link
US (1) US10156621B2 (pt)
JP (1) JP6285448B2 (pt)
CN (1) CN104755949B (pt)
BR (1) BR112015008810A2 (pt)
DE (1) DE112013005114T5 (pt)
GB (1) GB2522378B (pt)
RU (1) RU2015119475A (pt)
WO (1) WO2014064553A1 (pt)

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Also Published As

Publication number Publication date
JP6285448B2 (ja) 2018-02-28
WO2014064553A1 (en) 2014-05-01
GB201508617D0 (en) 2015-07-01
CN104755949B (zh) 2018-04-13
JP2015532162A (ja) 2015-11-09
DE112013005114T5 (de) 2015-09-10
GB2522378B (en) 2018-07-18
CN104755949A (zh) 2015-07-01
US10156621B2 (en) 2018-12-18
US20150268321A1 (en) 2015-09-24
RU2015119475A (ru) 2016-12-20
GB2522378A (en) 2015-07-22

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]
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 2479 DE 10-07-2018 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.