|
Abstract:
in our previous ultrasonic studies of bone, we have determined the material symmetry of bone, which is found to be consistent with the hexagonal system, and have measured the ultrasonic velocities as a function of frequency (1-10 mhz) along the eight unique orientations in a femoral bone specimen. since bone has been shown to be viscoelastic even at ultrasonic frequencies, frequency and temperature dependence of the ultrasonic velocities in bone are closely related to each other, e.g., by the time-temperature equivalent principle. however, due to large attenuation of ultrasound in bone above 10 mhz, it is difficult to investigate frequency dependence of the ultrasonic velocities in this range especially by either pulse-through-transmission or pulse-echo techniques. a right-angle reflector technique is very attractive for this purpose because it is based on the critical angle reflection in a liquid/solid boundary rather than the direct transmission, of an ultrasonic beam. in this investigation, the ultrasonic velocities have been measured both along the perpendicular to the long bone axis in the bovine femur as a function of temperature in the range 20 to 80 deg c. bone specimens have been prepared by the usual metallographic techniques, cutting with a low speed diamond saw and grinding on silicon carbide strips (240, 320, 400 and 600 grit). (author)
| Pages: |
1 |
| Report Date: |
JUN 80 |
| Report Number: |
D071903 |
Report Unavailable |
| This title is unavailable from Storming Media. We do not know when it might be available, if at all. We list the report on our site for bibliographic completeness, to help our users know what other work has been performed in this field. Please note that as with all titles on this site, we do not have contact information for any of the authors. Nor can we give any suggestions on how one might obtain this report. |
|
|
|
Email This Abstract
