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1. WO1996002857 - THREE-DIMENSIONAL ANISOTROPY CONTRAST MAGNETIC RESONANCE IMAGING

Publication Number WO/1996/002857
Publication Date 01.02.1996
International Application No. PCT/US1995/008731
International Filing Date 12.07.1995
Chapter 2 Demand Filed 25.01.1996
IPC
G01R 33/56 2006.01
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
G01R 33/563 2006.01
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
563of moving material, e.g. flow-contrast angiography
CPC
G01R 33/56
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
G01R 33/56341
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
56341Diffusion imaging
Applicants
  • THE REGENTS OF THE UNIVERSITY OF CALIFORNIA [US/US]; 22nd floor 300 Lakeside Drive Oakland, CA 94612-3550, US
Inventors
  • NAKADA, Tsutomu; US
Agents
  • BERLINER, Robert; Robbins, Berliner & Carson 5th floor 210 N. Figueroa Street Los Angeles, CA 90012-2628, US
Priority Data
08/277,67019.07.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) THREE-DIMENSIONAL ANISOTROPY CONTRAST MAGNETIC RESONANCE IMAGING
(FR) IMAGERIE PAR RESONANCE MAGNETIQUE A CONTRASTE ANISOTROPE TRIDIMENSIONNEL
Abstract
(EN)
A method for contrast magnetic resonance imaging (MRI) based on three axial anisotropic diffusion weighted images (DWIs) of the identical imaging plane. Three primary colors, red (30a), green (30b), and blue (30c), are first assigned (25) to the gray scale of the three axial, x-, y-, z-axis (20a-c), anisotropic DWIs. These three primary color images are then vectorially combined (35) to form a single image in full visible color spectrum (40). Since the sum of the three primary colors of the same intensity results in cancellation (white out), the process effectively eliminates the background signals from isotropic water motion. Accordingly, each pixel of the final color image exhibits a color of a unique frequency, according to the balance of red, green, and blue, reflecting direction of anisotropic water motion in space.
(FR)
L'invention se rapporte à un procédé d'imagerie par résonance magnétique (IRM) à contraste basé sur des images à pondération anisotrope tridimensionnelles du plan d'imagerie identique. Trois couleurs primaires, rouge (30a), vert (30b) et bleu (30c), sont d'abord attribuées (25) à l'échelle de gris des images à pondération par diffusion anisotrope selon trois axes, x, y, z (20a-c). Ces trois images à couleurs primaires sont ensuite combinées (35 ) vectoriellement pour former une image unique dans la totalité du spectre (40) des couleurs visibles. Puisque la somme des trois couleurs primaires de même intensité entraîne l'effacement (par mise à blanc), le procédé élimine efficacement le signaux de fond provenant du déplacement isotrope de l'eau. En conséquence, chaque pixel de l'image en couleur finale présente une couleur d'une fréquence unique, selon l'équilibre du sens de réflexion rouge, vert et bleu du déplacement anisotrope de l'eau dans l'espace.
Also published as
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