Abstract
Ultrasonic densitometry is one of the methods promising as a non-aggression measuring method of a bone density. The ultrasonic method has much possibility theoretically due to use an elastic vibration. However, since the reliability of a measurement results is not enough, the ultrasonic method has not reached a clinical criterion. We aim at the development of a new determination measurement technique for a bone density which uses the guided wave of the ultrasonic in the present study. We conducted the experiment of the guided wave with porous round rods of the same material but different densities. And then we investigated the velocity dispersion of the guided wave with the frequency-domain representation of the semblance lance method, and estimated the bulk velocity of the specimens from the velocity-dispersion characteristics.
