Method for reconstructing a signal from experimental...

G - Physics – 01 – R

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Details

G01R 33/561 (2006.01) G01R 33/563 (2006.01) G01R 33/565 (2006.01) G01R 33/567 (2006.01) G06T 11/00 (2006.01)

Patent

CA 2705388

The invention relates to a method for acquiring (1) experimental measures with interferences of a physical phenomenon, and for reconstructing (2) a point-by-point signal (3) representative of said phenomenon according to at least one dimension that can vary during the experimental measure acquisition, using at least one simulation model (4) of at least one acquisition chain of said experimental measures including at least one interference, and at least one model (8) of each interference in each acquisition chain, each interference model (8) being determined at least from the measures themselves, characterised in that the simulation and interference models include adjustable parameters (6, 10) depending on experimental conditions, wherein at least one adjustable parameter of one of said models is coupled to at least one adjustable parameter of the other model, and in that the adjustable parameters (6, 10) are optimised (2) in a coupled manner. The invention also relates to a device for MRI imaging, NMR, or medical imaging using such a method.

La présente invention concerne un procédé d'acquisition (1) de mesures expérimentales perturbées d'un phénomène physique et de reconstruction (2) d'un signal (3) ponctuel représentant ce phénomène physique, selon au moins une dimension, pouvant varier pendant l'acquisition des mesures expérimentales, utilisant au moins un modèle de simulation (4) d'au moins une chaîne d'acquisition de ces mesures expérimentales comportant au moins une perturbation, et au moins un modèle (8) de chaque perturbation de chaque chaîne d'acquisition, chaque modèle de perturbation (8) étant déterminé au moins à partir des mesures elles- mêmes, caractérisé en ce que les modèles de simulation et de perturbation comportent des paramètres ajustables (6, 10) dépendants des conditions expérimentales, au moins un paramètre ajustable d'un desdits modèles étant couplé à au moins un paramètre ajustable de l'autre modèle, et en ce que ces paramètres ajustables (6,10) sont optimisés (2) de manière couplée. L'invention concerne également un dispositif d'imagerie IRM, de RMN ou d'imagerie médicale mettant en oeuvre un tel procédé.

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