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1. WO2000040990 - CONTRAST AGENT ENHANCED MAGNETIC RESONANCE ANGIOGRAPHY WITH VESSEL SEGMENTATION

Publication Number WO/2000/040990
Publication Date 13.07.2000
International Application No. PCT/US2000/000137
International Filing Date 05.01.2000
Chapter 2 Demand Filed 21.06.2000
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 33/5619
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
5619by temporal sharing of data, e.g. keyhole, block regional interpolation scheme for k-Space [BRISK]
G01R 33/5635
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
5635Angiography, e.g. contrast-enhanced angiography [CE-MRA] or time-of-flight angiography [TOF-MRA]
Applicants
  • WISCONSIN ALUMNI RESEARCH FOUNDATION [US/US]; 614 Walnut Street Madison, WI 53705, US
Inventors
  • MISTRETTA, Charles, A.; US
  • GRIST, Thomas, M.; US
  • CARROLL, Timothy, J.; US
  • MAZAHERI, Yousef; US
Agents
  • SAMMONS, Barry, E.; Quarles & Brady LLP 411 East Wisconsin Avenue Milwaukee, WI 53202-4497, US
Priority Data
09/314,22718.05.1999US
60/115,25908.01.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CONTRAST AGENT ENHANCED MAGNETIC RESONANCE ANGIOGRAPHY WITH VESSEL SEGMENTATION
(FR) ANGIOGRAPHIE PAR RESONANCE MAGNETIQUE AMELIOREE PAR AGENT DE CONTRASTE AVEC SEGMENTATION DE VAISSEAUX
Abstract
(EN)
A magnetic resonance angiogram (RMA) is acquired using a contrast enhancement method in which a series of low resolution NMR images are rapidly acquired during a time resolved phase of the examination in which the contrast bolus makes a first pass through the arteries and veins. Additional, high resolution NMR image data is acquired in a subsequent steady-state phase of the examination from which a high resolution NMR image is reconstructed. Segmentation of arteries, veins and background in the high resolution image is performed using information in the low resolution NMR images.
(FR)
Selon cette invention, on acquiert un angiogramme par résonance magnétique (ARM) en utilisant un procédé d'amélioration de contraste dans lequel une série d'images RMN basse résolution est rapidement acquise pendant la phase de l'examen à résolution dans le temps durant laquelle le bolus de contraste passe pour la première fois à travers les veines et artères. Des données d'image RMN haute résolution sont ensuite acquises durant la phase suivante de l'examen, celle d'état stable, à partir de laquelle on reconstruit une image RMN haute résolution. On procède à la segmentation d'artères, de veines et à la création d'un fond pour les images haute résolution en utilisant les informations contenues dans les images RMN basse résolution.
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