Numerical evaluation of the backward propagating acoustic field in healing long bones.
J Acoust Soc Am
; 142(2): 962, 2017 08.
Article
em En
| MEDLINE
| ID: mdl-28863592
ABSTRACT
The propagation of ultrasound in healing long bones induces complex scattering phenomena due to the interaction of an ultrasonic wave with the composite nature of callus and osseous tissues. This work presents numerical simulations of ultrasonic propagation in healing long bones using the boundary element method aiming to provide insight into the complex scattering mechanisms and better comprehend the state of bone regeneration. Numerical models of healing long bones are established based on scanning acoustic microscopy images from successive postoperative weeks considering the effect of the nonhomogeneous callus structure. More specifically, the scattering amplitude and the acoustic pressure variation are calculated in the backward direction to investigate their potential to serve as quantitative and qualitative indicators for the monitoring of the bone healing process. The role of the excitation frequency is also examined considering frequencies in the range 0.2-1 MHz. The results indicate that the scattering amplitude decreases at later stages of healing compared to earlier stages of healing. Also, the acoustic pressure could provide supplementary qualitative information on the interaction of the scattered energy with bone and callus.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tíbia
/
Fraturas da Tíbia
/
Ultrassom
/
Remodelação Óssea
/
Consolidação da Fratura
/
Microscopia Acústica
/
Ondas Ultrassônicas
Tipo de estudo:
Prognostic_studies
/
Qualitative_research
Limite:
Animals
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article