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1. JPWO2013047275 - 磁気共鳴イメージング装置および磁気共鳴イメージング方法

Office
Japon
Numéro de la demande 2013536191
Date de la demande 19.09.2012
Numéro de publication WO2013047275
Date de publication 04.04.2013
Numéro de délivrance 5815722
Date de délivrance 02.10.2015
Type de publication A1
CIB
A61B 5/055
ANÉCESSITÉS COURANTES DE LA VIE
61SCIENCES MÉDICALE OU VÉTÉRINAIRE; HYGIÈNE
BDIAGNOSTIC; CHIRURGIE; IDENTIFICATION
5Mesure servant à établir un diagnostic; Identification des individus
05Mesure pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques
055faisant intervenir la résonance magnétique nucléaire ou électronique , p.ex. formation d'images par résonance magnétique
A61B 5/05
ANÉCESSITÉS COURANTES DE LA VIE
61SCIENCES MÉDICALE OU VÉTÉRINAIRE; HYGIÈNE
BDIAGNOSTIC; CHIRURGIE; IDENTIFICATION
5Mesure servant à établir un diagnostic; Identification des individus
05Mesure pour établir un diagnostic au moyen de courants électriques ou de champs magnétiques
CPC
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 33/4824
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
4824using a non-Cartesian trajectory
G01R 33/5608
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
5608Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels
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
Déposants 株式会社日立ヘルスケア・マニュファクチャリング
Inventeurs 鎌田 康弘
花田 光
瀧澤 将宏
Données relatives à la priorité 2011214936 29.09.2011 JP
Titre
(JA) 磁気共鳴イメージング装置および磁気共鳴イメージング方法
Abrégé
(JA)

非直交系計測の長所を維持しながら、画質を向上させる。そのために、非直交系計測において、k空間内のデータ密度が不均一であることに起因するアーチファクトを低減する。このため、各単位k空間を逆フーリエ変換して画像化し、データ密度を高めたい方向に画像の視野を拡大し、視野拡大後の画像をフーリエ変換して前記視野を拡大した方向のk空間ピッチが小さくデータ量が増加した単位k空間としてグリッディングする。この処理を全ブレードに対して繰り返す。


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