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1. WO2006135003 - 磁気共鳴イメージング装置

公開番号 WO/2006/135003
公開日 21.12.2006
国際出願番号 PCT/JP2006/312023
国際出願日 15.06.2006
IPC
A61B 5/055 2006.01
A生活必需品
61医学または獣医学;衛生学
B診断;手術;個人識別
5診断のための検出,測定または記録;個体の識別
05電流または磁場による診断のための測定
055電子または核の磁気共鳴を含むもの,例.磁気共鳴イメージング
CPC
A61B 5/055
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes
05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
055involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
A61B 6/5241
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
6Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
52Devices using data or image processing specially adapted for radiation diagnosis
5211involving processing of medical diagnostic data
5229combining image data of a patient, e.g. combining a functional image with an anatomical image
5235combining images from the same or different ionising radiation imaging techniques, e.g. PET and CT
5241combining overlapping images of the same imaging modality, e.g. by stitching
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 33/56375
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
56375Intentional motion of the sample during MR, e.g. moving table imaging
G01R 33/56383
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
56375Intentional motion of the sample during MR, e.g. moving table imaging
56383involving motion of the sample as a whole, e.g. multistation MR or MR with continuous table motion
G06T 3/0075
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
3Geometric image transformation in the plane of the image
0068for image registration, e.g. elastic snapping
0075using affine transformations
出願人
  • 株式会社 日立メディコ HITACHI MEDICAL CORPORATION [JP]/[JP] (AllExceptUS)
  • 谷口 陽 TANIGUCHI, Yo [JP]/[JP] (UsOnly)
  • 越智 久晃 OCHI, Hisaaki [JP]/[JP] (UsOnly)
  • 高橋 哲彦 TAKAHASHI, Tetsuhiko [JP]/[JP] (UsOnly)
  • 瀧澤 将宏 TAKIZAWA, Masahiro [JP]/[JP] (UsOnly)
発明者
  • 谷口 陽 TANIGUCHI, Yo
  • 越智 久晃 OCHI, Hisaaki
  • 高橋 哲彦 TAKAHASHI, Tetsuhiko
  • 瀧澤 将宏 TAKIZAWA, Masahiro
代理人
  • 多田 公子 TADA, Kimiko
優先権情報
2005-17448915.06.2005JP
2006-10372905.04.2006JP
公開言語 (言語コード) 日本語 (JA)
出願言語 (言語コード) 日本語 (JA)
指定国 (国コード)
発明の名称
(EN) MAGNETIC RESONANCE IMAGING DEVICE
(FR) DISPOSITIF D’IMAGERIE À RÉSONANCE MAGNÉTIQUE
(JA) 磁気共鳴イメージング装置
要約
(EN)
A magnetic resonance imaging device includes: a control device for applying a high-frequency magnetic field and an inclined magnetic field to an examinee placed in a static magnetic field and controlling a pulse sequence detecting a magnetic resonance signal generated from the examinee; and an operation device for processing the signal. The control device [1] performs control to obtain a first image in a position different from the first direction, [2] performs a process to acquire an image in which luminance distortion is corrected as compared to the aforementioned image, [3] performs a process to acquire an image in which position distortion is corrected as compared to the image in which the luminance distortion is corrected, and [4] performs a process to combine the overlapped area of the image in which the position distortion is corrected, by a weighted calculation. The magnetic resonance imaging device enables correction of the position distortion and the luminance distortion at the coupling of images of multi-station imaging.
(FR)
L’invention concerne un dispositif d’imagerie à résonance magnétique comprenant : un dispositif de commande pour appliquer un champ magnétique haute fréquence et un champ magnétique incliné à un patient examiné placé dans un champ magnétique statique et commander la séquence d’impulsions détectant un signal de résonance magnétique généré par le patient examiné ; et un dispositif opérationnel pour traiter le signal. Le dispositif de commande [1] fournit les commandes pour obtenir une première image en une position différente de la première direction, [2] applique un processus pour acquérir une image dont la distorsion de luminosité est corrigée comparée à l’image susmentionnée, [3] applique un processus pour acquérir une image dont la distorsion de position est corrigée comparée à l’image dont la distorsion de luminosité est corrigée, et [4] applique un processus pour combiner la zone de recouvrement de l’image dont la distorsion de position est corrigée par un calcul pondéré. Le dispositif d’imagerie à résonance magnétique autorise la correction de la distorsion de position et de la distorsion de luminosité au couplage d’images d’une imagerie multi-station.
(JA)
 磁気共鳴イメージング装置は、静磁場の中に置かれた被検体に、高周波磁場、傾斜磁場を印加して、前記被検体から発生する磁気共鳴信号を検出するパルスシーケンスを制御する制御装置と、前記信号を処理する演算装置とを有し、前記制御装置は、(1)第1の方向の異なる位置において第1の画像を得る制御と、(2)前記画像に対して輝度ひずみを補正された画像を得る処理と、(3)前記輝度ひずみを補正された画像に対して位置ひずみを補正された画像を得る処理と、(4)前記位置ひずみが補正された画像の重なり領域を重み付き演算によって合成する処理を行う。この磁気共鳴イメージング装置によれば、マルチステーション撮影の画像のつなぎ合わせにおいて、位置ひずみと輝度ひずみを補正することができる。
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