Measurements have been performed on Sawbones(R) and bovine cortical bone samples at 200 kHz using an axial transmission technique to investigate the factors that determine how ultrasonic waves propagate across a simulated fracture. The peak amplitude of the first arrival signal (FAS) was studied. Results taken from intact specimens were compared with those produced when a simple transverse fracture was introduced. These fracture simulation experiments were found to be consistent with Finite Difference modelling of the experimental conditions. The peak amplitude showed a characteristic variation across the fracture caused by interference between reradiated and scattered/diffracted waves at the fracture site and a net Fracture Transmission Loss (FTL). For small fracture gaps, the change in amplitude was sensitive to the presence of the fracture. This sensitivity suggests that this parameter could be a good quantitative indicator for the fracture healing process assuming the relative change in this parameter brought about by healing is measurable.
|Number of pages||6|
|Publication status||Published - 2007|
Dodd, S. P., Cunningham, J. L., Miles, A. W., Gheduzzi, S., & Humphrey, V. F. (2007). An in vitro study of ultrasound signal loss across simple fractures in cortical bone mimics and bovine cortical bone samples. Bone, 40(3), 656-661.