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1. JP2013521955 - 正規化非線形逆再構成法を用いて磁気共鳴画像シーケンスを再構成するための方法及び装置

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Office
Japan
Application Number 2013500333
Application Date 23.03.2010
Publication Number 2013521955
Publication Date 13.06.2013
Grant Number 5717839
Grant Date 27.03.2015
Publication Kind B2
IPC
A61B 5/055
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
05Measuring for diagnosis by means of electric currents or magnetic fields
055involving electronic or nuclear magnetic resonance, e.g. magnetic resonance imaging
CPC
G01R 33/246
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
24for measuring direction or magnitude of magnetic fields or magnetic flux
246Spatial mapping of the RF magnetic field B1
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
G01R 33/56308
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
563of moving material, e.g. flow contrast angiography
56308Characterization of motion or flow; Dynamic imaging
Applicants マックス　プランク　ゲゼルシャフト　ツゥアー　フェデルゥン　デル　ヴィッセンシャフテン　エー　フォー
Inventors フラーム，イェンス
ユッカー，マルティン
ジャン，シュオ
Agents 豊栖　康司
豊栖　康弘
Title
(JA) 正規化非線形逆再構成法を用いて磁気共鳴画像シーケンスを再構成するための方法及び装置
Abstract
(JA)

【課題手段】ＭＲ画像再構成方法は、（ａ）ＭＲ画像の画像コンテンツを有するＭＲＩ装置の高周波受信コイルを用いて収集される連続セットの画像未処理データを提供し、（ｂ）ＭＲ画像を提供するよう正規化非線形逆再構成をそのセットのデータに行う。各セットのデータはコイルで受信されるＭＲＩ信号を非デカルトｋ空間軌道を用いて空間的に符号化する傾斜エコー（特にＦＬＡＳＨ）シーケンスによって生成される複数のデータサンプルを有する。各セットのデータが等価空間周波数成分を有するｋ空間における１セットの均等分配線を備える。各セットのデータの線がｋ空間の中心で交差し、空間周波数の連続範囲をカバーする。各セットのデータの線の位置が連続セットにおいて異なる。各ＭＲ画像は、コイルの感度及び画像コンテンツの同時評価によって、かつコイル及び画像コンテンツの感度の現在の評価と先の評価との差に応じて形成される。
【選択図】図３
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