Method and device for probabilistic objective assessment of...

A - Human Necessities – 61 – B

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A61B 5/0476 (2006.01) A61B 5/0484 (2006.01)

Patent

CA 2750643

A method and apparatus for providing objective assessment of the brain state of a subject using a field portable device. The method includes placing an electrode set coupled to a handheld base unit on the subject's head, acquiring electrical brain signals from the subject through the electrode set, processing the acquired electrical brain signals using a feature extraction algorithm, classifying the extracted features into brain states, computing brain abnormality indices reflecting the probability of correct classification of brain state, and graphically displaying the classification result and the abnormality indices on the handheld base unit.

L'invention porte sur un procédé et un appareil de fourniture d'évaluation objective de l'état du cerveau chez un sujet à l'aide d'un dispositif portable sur le terrain. Le procédé comprend la mise en place d'un ensemble d'électrodes couplées à une unité de base portative sur la tête du sujet, l'acquisition de signaux électriques cérébraux à partir du sujet au moyen de l'ensemble d'électrodes, le traitement des signaux électriques cérébraux acquis à l'aide d'un algorithme d'extraction de caractéristiques, le classement des caractéristiques extraites en états de cerveau, le calcul d'indices d'anomalie cérébrale reflétant la probabilité de classification correcte de l'état du cerveau, et l'affichage graphique du résultat de la classification et des indices d'anomalie sur l'unité de base portative.

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