Method and device for using a multi-channel measurement...

A - Human Necessities – 61 – B

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A61B 5/04 (2006.01) G01N 19/00 (2006.01)

Patent

CA 2540113

The invention relates to a method for interpreting the current distribution of an object being measured using basis vector components calculated from the measured signals. The components in question have been so selected that they describe the features, as independent as possible, of the current distribution being examined, which enhances the computation and makes it more accurate. This is achieved by converting the measured signals into a more natural form from the standpoint of the current distribution while totally eliminating the signals associated with the external interferences. A conversion of this kind has been described e.g. in patent publication F120030392. After the conversion, the source modelling is performed in an optimal manner using the basis vector components of the signal space instead of the actual measurement signals. One substantial feature of the invention is that after the conversion, the source model need not be regularised any more.

La présente invention a trait à un procédé pour l'interprétation de la distribution de courant d'un objet soumis à une mesure au moyen de composantes de vecteur calculées à partir de signaux mesurés. Lesdites composantes ont été sélectionnées de manière à décrire les caractéristiques, de manière la plus indépendante possible, de la distribution de courant sous inspection, améliorant ainsi le calcul et lui procurant une plus grande précision. Cela est obtenu grâce à la conversion de signaux mesurés en une forme plus naturelle en termes de la distribution de courant tout en éliminant complètement les signaux associés aux interférences externes. Une conversion de ce type a été décrite, par exemple dans la publication du brevet FI 20030392. Suite à la conversion, la modélisation de source est réalisée de manière optimale au moyen des composantes de vecteur de l'espace des signaux au lieu de la mesure des signaux eux-mêmes. L'invention se caractérise essentiellement en ce que suite à la conversion, la régularisation du modèle de source n'est plus nécessaire.

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