Ultrasonic device for determining bone characteristics

Details Ultrasonic device for determining bone characteristics Ultrasonic device for determining bone characteristics

G - Physics

01

N

G01N 29/26 (2006.01) A61B 8/00 (2006.01) A61B 8/08 (2006.01) G01B 17/02 (2006.01) G01H 5/00 (2006.01) G01N 29/07 (2006.01)

Patent

CA 2233852

A method for determining, through an interposing medium, the mechanical properties of a solid having a surface, including transmitting a first ultrasonic wave along a transmission path from a first location through the interposing medium, along the surface and from the surface through the interposing medium to a second location; measuring the travel time of the first wave along the transmission path; measuring the thickness of the interposing medium; measuring the acoustic velocity of the interposing medium; and calculating the acoustic velocity in the solid based on the distance between the locations, the thickness of the interposing medium and the acoustic velocity in the interposing medium.

La présente invention concerne un procédé permettant de déterminer, au travers d'un milieu d'interposition, les propriétés mécaniques d'un solide caractérisé par une surface. Ce procédé consiste: à émettre une première onde ultrasonore selon un trajet d'émission qui part d'un premier emplacement, traverse le milieu d'interposition, longe la surface, et depuis la surface, traverse le milieu d'interposition et se termine en un second emplacement; à mesurer le temps de parcours de la première onde le long du trajet d'émission; à mesurer l'épaisseur du milieu d'interposition; à mesurer la vitesse spécifique de propagation sonore dans le milieu d'interposition; et à calculer la vitesse spécifique de propagation sonore dans le solide d'après la distance entre les emplacements, l'épaisseur du milieu d'interposition et la vitesse spécifique de propagation sonore dans le milieu d'interposition.

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