Method and device for measuring a mean value of...

A - Human Necessities – 61 – B

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A61B 8/08 (2006.01)

Patent

CA 2685886

The invention relates to a method for measuring a mean visco-elasticity value for a soft material. Said method using a single probe carrying at least one transducer comprises the steps of : a) inducing, in a constraint zone, at least one burst of mechanical vibrations in order to generate internal shear waves in the tissue propagating from said constraint zone into the tissue, bl) measuring, with said transducer, the transient tissue displacements in at least one first measurement zone in the tissue, said first measurement zone being located away from said constraint zone, c) estimating a mean visco-elasticity of the region of the tissue situated between the constraint zone and the first measurement zone from said measured transient tissue displacements of the tissue in the first measurement zone.

L'invention porte sur un procédé pour mesurer la valeur de viscoélasticité moyenne d'un matériau mou. Le procédé utilise une seule sonde portant au moins un transducteur consistant à : a) dans une zone de contrainte, induire au moins une salve de vibrations mécaniques pour générer des ondes de cisaillement internes dans le tissu, lesquelles se propage de ladite zone de contrainte à l'intérieur du tissu ; b) mesurer avec ledit transducteur les déplacements de tissu transitoires dans au moins une première zone de mesure du tissu, laquelle est située à distance de ladite zone de contrainte ; c) estimer une viscoélasticité moyenne de la région du tissu située entre la zone de contrainte et la première zone de mesure à partir desdits déplacements de tissu transitoires mesurés dans la première zone de mesure.

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