BRPI1006297A2 - método de representação de imagem, sistema de ressonância magnética, meio legível por computador e sistema de ressonância magnética - Google Patents

método de representação de imagem, sistema de ressonância magnética, meio legível por computador e sistema de ressonância magnética

Info

Publication number
BRPI1006297A2
BRPI1006297A2 BRPI1006297-1A BRPI1006297A BRPI1006297A2 BR PI1006297 A2 BRPI1006297 A2 BR PI1006297A2 BR PI1006297 A BRPI1006297 A BR PI1006297A BR PI1006297 A2 BRPI1006297 A2 BR PI1006297A2
Authority
BR
Brazil
Prior art keywords
magnetic resonance
pulse
resonance system
repetitive
computer readable
Prior art date
Application number
BRPI1006297-1A
Other languages
English (en)
Inventor
Graesslin Ingmar
Schweser Ferdinand
Boernert Peter
Royston Harvey Paul
Original Assignee
Koninklijke Philips Electronics N.V.
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 N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of BRPI1006297A2 publication Critical patent/BRPI1006297A2/pt

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
    • G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
    • G01R33/3415—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils comprising arrays of sub-coils, i.e. phased-array coils with flexible receiver channels
    • 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
    • G01R33/561—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
    • G01R33/5611—Parallel magnetic resonance imaging, e.g. sensitivity encoding [SENSE], simultaneous acquisition of spatial harmonics [SMASH], unaliasing by Fourier encoding of the overlaps using the temporal dimension [UNFOLD], k-t-broad-use linear acquisition speed-up technique [k-t-BLAST], k-t-SENSE
    • G01R33/5612—Parallel RF transmission, i.e. RF pulse transmission using a plurality of independent transmission channels
    • 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]
    • G01R33/48—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
    • G01R33/44—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

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

método de representação de imagem, sistema de ressonância magnética, meio legível por computador e sistema de ressonância magnética seqüência de ressonância magnética inclui um pulso b1 de radiofrequência aplicado repetitivamente, capaz de causar um foco de taxa de absorção específica (sar) . a composição do pulso b1 repetitivo é variada para gerar versões do pulso b1 repetitivo, de modo que o foco sar mude de locais com aplicações subsequentes do pulso b1 repetitivo. para gerar versões do pulso b1 , um escaneamento piloto é executado para gerar um modelo de paciente. uma simulação da resposta sar a cada uma das versões do pulso b1 repetitivo é executada para determinar o local de foco(s) sar. uma pluralidade de versões do pulso b1 repetitivo é selecionada para ser usada na seqüência de ressonância magnética.
BRPI1006297-1A 2009-04-01 2010-03-31 método de representação de imagem, sistema de ressonância magnética, meio legível por computador e sistema de ressonância magnética BRPI1006297A2 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09157061 2009-04-01
EP09157061.4 2009-04-01
PCT/IB2010/051399 WO2010113122A1 (en) 2009-04-01 2010-03-31 Sar hotspot reduction by temporal averaging in parallel transmission mri

Publications (1)

Publication Number Publication Date
BRPI1006297A2 true BRPI1006297A2 (pt) 2019-04-02

Family

ID=42271935

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI1006297-1A BRPI1006297A2 (pt) 2009-04-01 2010-03-31 método de representação de imagem, sistema de ressonância magnética, meio legível por computador e sistema de ressonância magnética

Country Status (6)

Country Link
US (1) US9316710B2 (pt)
EP (1) EP2414857B1 (pt)
JP (1) JP5685576B2 (pt)
CN (1) CN102369453B (pt)
BR (1) BRPI1006297A2 (pt)
WO (1) WO2010113122A1 (pt)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5685576B2 (ja) * 2009-04-01 2015-03-18 コーニンクレッカ フィリップス エヌ ヴェ パラレルトランスミッションｍｒｉにおける時間平均によるｓａｒホットスポットの低減
DE102009030721B4 (de) * 2009-06-26 2013-04-04 Siemens Aktiengesellschaft SAR-Berechnung für mehrkanalige MR-Sendesysteme
DE102011083959B4 (de) * 2011-10-04 2021-02-25 Siemens Healthcare Gmbh Verfahren zur Ansteuerung eines Magnetresonanzsystems
DE102012212402B3 (de) * 2012-03-20 2013-10-17 Siemens Aktiengesellschaft Ermittlung einer MR-Sequenz unter Berücksichtigung der Energieverteilungsfunktion im k-Raum
US9417298B2 (en) 2012-05-09 2016-08-16 The General Hospital Corporation Local SAR reduction in multi-slice pTx via SAR-hopping between excitations
CN107092002A (zh) * 2012-11-27 2017-08-25 朱宇东 一种利用具有电流传输路径的网络实现电磁场的时空变化的方法
WO2015029652A1 (ja) * 2013-08-27 2015-03-05 株式会社日立メディコ 磁気共鳴撮像装置および撮像パラメータ決定方法
DE102016209088A1 (de) * 2016-05-25 2017-11-30 Siemens Healthcare Gmbh Überwachung einer Absorptionsrate induktiv gekoppelter Spulen
JP6965073B2 (ja) * 2017-09-19 2021-11-10 キヤノンメディカルシステムズ株式会社 磁気共鳴イメージング装置
JP2023541572A (ja) * 2020-09-18 2023-10-03 コルスメド アクチエボラグ 磁気共鳴（ｍｒ）イメージングシミュレーションを対象とする方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3732365B2 (ja) * 1999-09-08 2006-01-05 ジーイー横河メディカルシステム株式会社 スピン励起方法および装置並びに磁気共鳴撮像装置
WO2003046597A1 (en) * 2001-11-26 2003-06-05 Koninklijke Philips Electronics N.V. Magnetic resonance imaging method with reduced acoustic noise
JP2007526783A (ja) * 2003-06-30 2007-09-20 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において比吸収率（ｓａｒ）を制御する装置及び方法
US7053618B2 (en) 2003-11-26 2006-05-30 General Electric Company Method and apparatus to generate an RF excitation consistent with a desired excitation profile using a transmit coil array
EP1745306A1 (en) * 2004-04-29 2007-01-24 Koninklijke Philips Electronics N.V. A magnetic resonance imaging system, a method of magnetic resonance imaging and a computer program
US7385396B2 (en) * 2006-04-20 2008-06-10 General Electric Company SAR reduction in MR imaging with parallel RF transmission
US7336145B1 (en) 2006-11-15 2008-02-26 Siemens Aktiengesellschaft Method for designing RF excitation pulses in magnetic resonance tomography
US7808240B2 (en) * 2008-04-30 2010-10-05 General Electric Company Apparatus and method for optimizing the spectra of parallel excitation pulses
US8148985B2 (en) * 2008-10-15 2012-04-03 Massachusetts Institute Of Technology Method for reducing maximum local specific absorption rate in magnetic resonance imaging
JP5685576B2 (ja) * 2009-04-01 2015-03-18 コーニンクレッカ フィリップス エヌ ヴェ パラレルトランスミッションｍｒｉにおける時間平均によるｓａｒホットスポットの低減
CN102428382B (zh) * 2009-04-02 2015-02-25 皇家飞利浦电子股份有限公司 通过k空间相关rf脉冲选择来降低并行发射中的sar

Also Published As

Publication number Publication date
US20120013337A1 (en) 2012-01-19
CN102369453A (zh) 2012-03-07
US9316710B2 (en) 2016-04-19
JP2012522562A (ja) 2012-09-27
EP2414857B1 (en) 2019-12-04
CN102369453B (zh) 2014-10-22
WO2010113122A1 (en) 2010-10-07
JP5685576B2 (ja) 2015-03-18
EP2414857A1 (en) 2012-02-08

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 9A ANUIDADE.

B25D Requested change of name of applicant approved

Owner name: KONINKLIJKE PHILIPS N.V. (NL)

B25G Requested change of headquarter approved

Owner name: KONINKLIJKE PHILIPS N.V. (NL)

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 2518 DE 09-04-2019 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.

B350 Update of information on the portal [chapter 15.35 patent gazette]