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1. WO2002042788 - SIGNAL ANALYSIS FOR NAVIGATED MAGNETIC RESONANCE IMAGING

Publication Number WO/2002/042788
Publication Date 30.05.2002
International Application No. PCT/US2001/049980
International Filing Date 07.11.2001
IPC
G01R 33/567 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
567gated by physiological signals
CPC
G01R 33/5676
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
567gated by physiological signals ; , i.e. synchronization of acquired MR data with periodical motion of an object of interest, e.g. monitoring or triggering system for cardiac or respiratory gating
5676Gating or triggering based on an MR signal, e.g. involving one or more navigator echoes for motion monitoring and correction
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL]
Inventors
  • FOXALL, David, L.
Agents
  • LUNDIN, Thomas, M.
Priority Data
09/718,72822.11.2000US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SIGNAL ANALYSIS FOR NAVIGATED MAGNETIC RESONANCE IMAGING
(FR) ANALYSE DE SIGNAUX POUR L'IMAGERIE PAR RESONANCE MAGNETIQUE A NAVIGATION
Abstract
(EN)
A method of imaging a patient with an MRU scanner (10) includes imaging a region of interest of the patient with the MRI scanner (10) and acquiring image data resulting from the imaging. An image of the region of interest is reconstructed form the image data. Them method also includes generating navigator echos during the imaging, collecting the navigator echos and deriving, from each navigator echo, a measurement of patient motion experience during the imaging. A historical record of the measurements is maintained. Parameters for the acquisition of image data are selected to compensate for motion, or specific image data is selected for reconstruction, based on the historical record.
(FR)
Procédé permettant d'obtenir des images d'un patient à l'aide d'un scanner à IRM (10), qui consiste à obtenir des images d'une zone concernée du patient à l'aide d'un scanner à IMR (10) et à recueillir les données d'images résultant de la prise d'images. Une image de la zone concernée est reconstituée à partir des données d'images. Ledit procédé consiste également à produire des échos navigateurs pendant la prise d'images, à collecter les échos navigateurs et à déduire, à partir de chaque écho navigateur, une mesure des mouvements du patient pendant la prise d'images. Un historique des mesures est conservé. Des paramètres d'acquisition de données d'images sont choisis pour compenser les mouvements, ou bien des données d'images spécifiques sont choisies pour la reconstitution, sur la base de l'historique.
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