Method and apparatus for the elastographic examination of...

G - Physics – 01 – R

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G01R 33/563 (2006.01) A61B 5/055 (2006.01) A61B 8/08 (2006.01)

Patent

CA 2687039

The invention relates to a method for elastographically examining tissue. Said method comprises the following steps: at least one mechanical wave that oscillates primarily or exclusively perpendicular to the direction of propagation thereof is excited in the tissue (31) which has first elastic properties at least at one first point in time and second elastic properties differing from the first elastic properties at least at one second point in time; and a first deflection or deflection rate of an oscillation of the wave is determined at the first point in time as a measure of the first elastic properties, and a second deflection or deflection rate of an oscillation of the wave is determined at the second point in time as a measure of the second elastic properties. The invention further relates to an apparatus for elastographically examining tissue.

La présente invention concerne un procédé d'analyse élastographique de tissu qui consiste à exciter au moins une onde mécanique dans le tissu (31), laquelle onde oscille majoritairement ou exclusivement de façon transversale à sa direction de propagation. Le tissu (31) présente à au moins un premier moment des premières caractéristiques élastiques et à au moins un second moment des secondes caractéristiques élastiques, différentes des premières caractéristiques élastiques. Au premier moment, une première déviation ou une première vitesse de déviation d'une oscillation de l'onde est déterminée en tant que grandeur pour les premières caractéristiques élastiques et, au second moment, une seconde déviation ou une seconde vitesse de déviation d'une oscillation de l'onde est déterminée en tant que grandeur pour les secondes caractéristiques élastiques. Cette invention concerne également un dispositif d'analyse élastographique de tissu.

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