MX2014001716A - Reduccion del campo de transmision de radiofrecuencia en un volumen predeterminado durante la formacion de imagenes de resonancia magnetica. - Google Patents

Reduccion del campo de transmision de radiofrecuencia en un volumen predeterminado durante la formacion de imagenes de resonancia magnetica.

Info

Publication number
MX2014001716A
MX2014001716A MX2014001716A MX2014001716A MX2014001716A MX 2014001716 A MX2014001716 A MX 2014001716A MX 2014001716 A MX2014001716 A MX 2014001716A MX 2014001716 A MX2014001716 A MX 2014001716A MX 2014001716 A MX2014001716 A MX 2014001716A
Authority
MX
Mexico
Prior art keywords
radio
magnetic resonance
resonance imaging
reducing
frequency
Prior art date
Application number
MX2014001716A
Other languages
English (en)
Inventor
Hanno Heyke Homann
Ingmar Graesslin
Ulrich Katscher
Tobias Ratko Voigt
Olaf Helmut Dössel
Sebastian Alfred Seitz
Original Assignee
Koninkl 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 Koninkl Philips Nv filed Critical Koninkl Philips Nv
Publication of MX2014001716A publication Critical patent/MX2014001716A/es

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
    • G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
    • 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
    • G01R33/56—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
    • G01R33/285—Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR

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

Las modalidades de la invención se refieren a un sistema de formación de imágenes de resonancia magnética (300) para la adquisición de datos de resonancia magnética (358) de un sujeto (318) que puede comprender un objeto eléctricamente conductor (por ejemplo, un implante o un dispositivo médico) El sistema de formación de imágenes de resonancia magnética comprende un transmisor de radiofrecuencia (314) para generar un campo de transmisión de radiofrecuencia para la adquisición de los datos de resonancia magnética utilizando una antena de radiofrecuencia (310) . El transmisor de radiofrecuencia tiene múltiples canales de transmisión. La antena de radiofrecuencia comprende múltiples elementos de antena (312) adaptado cada uno para conectarse a un elemento de antena. De acuerdo con una modalidad de la invención, se seleccionan valores de amplitud y fase del campo de transmisión RF de cada uno de los canales de transmisión de manera que el campo magnético generado por la antena RF se reduce al mínimo en la ubicación del objeto eléctricamente conductor, reduciendo de este modo el calentamiento RF del objeto.
MX2014001716A 2011-08-17 2012-08-15 Reduccion del campo de transmision de radiofrecuencia en un volumen predeterminado durante la formacion de imagenes de resonancia magnetica. MX2014001716A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161524369P 2011-08-17 2011-08-17
PCT/IB2012/054163 WO2013024449A1 (en) 2011-08-17 2012-08-15 Reducing the radio-frequency transmit field in a predetermined volume during magnetic resonance imaging

Publications (1)

Publication Number Publication Date
MX2014001716A true MX2014001716A (es) 2014-03-21

Family

ID=47178771

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2014001716A MX2014001716A (es) 2011-08-17 2012-08-15 Reduccion del campo de transmision de radiofrecuencia en un volumen predeterminado durante la formacion de imagenes de resonancia magnetica.

Country Status (6)

Country Link
US (1) US9702950B2 (es)
EP (1) EP2745133B1 (es)
JP (1) JP6169573B2 (es)
CN (1) CN103733083B (es)
MX (1) MX2014001716A (es)
WO (1) WO2013024449A1 (es)

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DE102013206326B4 (de) * 2013-04-10 2014-11-20 Siemens Aktiengesellschaft Betriebsverfahren für eine Magnetresonanzanlage mit mehreren Sendeantennen
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US10598739B2 (en) * 2018-06-18 2020-03-24 Allegro Microsystems, Llc Magnetic field sensors having virtual signals
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Also Published As

Publication number Publication date
US9702950B2 (en) 2017-07-11
JP6169573B2 (ja) 2017-07-26
EP2745133A1 (en) 2014-06-25
WO2013024449A1 (en) 2013-02-21
CN103733083A (zh) 2014-04-16
EP2745133B1 (en) 2022-03-09
US20140210472A1 (en) 2014-07-31
CN103733083B (zh) 2016-10-26
JP2014525812A (ja) 2014-10-02

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