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1. WO2011085739 - METHOD AND DEVICE FOR MAGNETIC RESONANCE SPECTROSCOPIC IMAGING

Publication Number WO/2011/085739
Publication Date 21.07.2011
International Application No. PCT/EP2010/000254
International Filing Date 18.01.2010
IPC
G01R 33/485 2006.1
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance
48NMR imaging systems
483with selection of signal or spectra from particular regions of the volume, e.g. in vivo spectroscopy
485based on chemical shift information
G01R 33/561 2006.1
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance
48NMR imaging systems
54Signal processing systems, e.g. using pulse sequences
56Image enhancement or correction, e.g. subtraction or averaging techniques
561by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
CPC
G01R 33/4818
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance [NMR]
48NMR imaging systems
4818MR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g. centric or segmented coverage of k-space
G01R 33/482
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance [NMR]
48NMR imaging systems
4818MR characterised by data acquisition along a specific k-space trajectory or by the temporal order of k-space coverage, e.g. centric or segmented coverage of k-space
482using a Cartesian trajectory
G01R 33/485
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance [NMR]
48NMR imaging systems
483with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
485based on chemical shift information ; CSI or spectroscopic imaging, e.g. to acquire the spatial distributions of metabolites
G01R 33/5611
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance [NMR]
48NMR imaging systems
54Signal processing systems, e.g. using pulse sequences ; , Generation or control of pulse sequences
56Image enhancement or correction, e.g. subtraction or averaging techniques ; , e.g. improvement of signal-to-noise ratio and resolution
561by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
5611Parallel 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
G01R 33/5616
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance [NMR]
48NMR imaging systems
54Signal processing systems, e.g. using pulse sequences ; , Generation or control of pulse sequences
56Image enhancement or correction, e.g. subtraction or averaging techniques ; , e.g. improvement of signal-to-noise ratio and resolution
561by reduction of the scanning time, i.e. fast acquiring systems, e.g. using echo-planar pulse sequences
5615Echo train techniques involving acquiring plural, differently encoded, echo signals after one RF excitation, e.g. using gradient refocusing in echo planar imaging [EPI], RF refocusing in rapid acquisition with relaxation enhancement [RARE] or using both RF and gradient refocusing in gradient and spin echo imaging [GRASE]
5616using gradient refocusing, e.g. EPI
Applicants
  • MAX-PLANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E.V. [DE]/[DE] (AllExceptUS)
  • LABADIE, Christian [FR]/[FR] (UsOnly)
  • HETZER, Stefan [DE]/[DE] (UsOnly)
  • MILDNER, Toralf [DE]/[DE] (UsOnly)
  • MOELLER, Harald [DE]/[DE] (UsOnly)
Inventors
  • LABADIE, Christian
  • HETZER, Stefan
  • MILDNER, Toralf
  • MOELLER, Harald
Agents
  • HERTZ, Oliver
Priority Data
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND DEVICE FOR MAGNETIC RESONANCE SPECTROSCOPIC IMAGING
(FR) PROCÉDÉ ET DISPOSITIF POUR IMAGERIE SPECTROSCOPIQUE PAR RÉSONANCE MAGNÉTIQUE
Abstract
(EN) A method of magnetic resonance spectroscopic imaging of an object (O) including at least one chemical species to be imaged, comprising sampling of the k-space such that a plurality of Nω first sampling trajectories through at least one k-space segment of the k-space is formed along a phase-encoding direction, each of said first sampling trajectories beginning in a central k-space region and continuing to a k-space border of the at least one k-space segment and having a duration equal to or below a spectral dwell time corresponding to the reciprocal spectral bandwidth, collecting at least one first set of gradient-echo signals obtained along said first sampling trajectories, collecting at least one second set of gradient-echo signals obtained along a plurality of Nω second sampling trajectories, said Nω second sampling trajectories and said Nω first sampling trajectories being mutually mirrored relative to a predetermined k-space line in the central k-space region.
(FR) L'invention porte sur un procédé d'imagerie spectroscopique par résonance magnétique d'un objet (O) comprenant au moins une espèce chimique à représenter par une image, le procédé comprenant l'échantillonnage d'un espace k tel qu'une pluralité de Nω premières trajectoires d'échantillonnage à travers au moins un segment d'espace k de l'espace k est formée le long d'une direction de codage de phase, chacune desdites premières trajectoires d'échantillonnage commençant dans une région d'espace k centrale et continuant jusqu'à une frontière d'espace k du moins un segment d'espace k et ayant une durée égale ou inférieure à un temps de séjour spectral correspondant à l'inverse de la largeur de bande spectrale, la collecte d'au moins un premier jeu de signaux gradient-écho obtenus le long desdites premières trajectoires d'échantillonnage, la collecte d'au moins un second jeu de signaux gradient-écho obtenus le long d'une pluralité de Nω secondes trajectoires d'échantillonnage, lesdites Nω secondes trajectoires d'échantillonnage et lesdites Nω premières trajectoires d'échantillonnage étant mutuellement le reflet de l'une de l'autre dans un miroir par rapport à une ligne d'espace k prédéterminée dans la région d'espace k centrale.
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