Abstract
Backscattering is a type of diffuse reflection, it corresponds to the interference of multiple reflected waves from the scatters or the internal microstructures. Monitoring the setting of cement with ultrasound can be performed by using backscattering analysis. In contrast to the impulse echo technique were important information of the background echo is lost, by analysing the backscattered field with a single transducer technique, it is possible to describe the state of the material and its acoustic properties. The backscatter parameters used in this work are based on the difference backscattering spectrum technique. The backscattered energy corresponding to two nearby zones of the material is compared. From this parameter we calculate the mean backscatter-difference, which consists in performing a frequency averaging of the spectrum of the backscattered power. O’Donnell and Miller proposed in 1981 a backscattering model for the characterization of tissues. In this work, we perform ultrasonic experimental measurements in the process of the setting of cement and use this theoretical model to confirm the predictions. For this we assume the hypothesis that the distance between the backscattered analysis windows is very small, and the attenuation and dispersion properties of both portions of the material are very similar. Under these conditions, the model is simplified, and the attenuation coefficient is estimated from ultrasound speed propagation and the size of the windows, during the setting process of the cement.
BibTeX citation
@inproceedings{SendraMOMA2018,
author = {Josep Rodríguez-Sendra and Noé Jiménez and Rubén Picó and Joan Faus and Francisco Camarena},
booktitle = {VI Jornadas de Modelización Matemática. Valencia, Spain. 24 - 26 May},
editor = {Book of abstracts},
isbn = {ISBN: 978-3-200-05210-9},
month = {5},
organization = {Instituto Universitario de Matematica Pura y Aplicada},
pages = {1},
publisher = {Universitat Politècnica de València},
series = {Oral},
title = {Modelling ultrasonic signal backscattering in bone-cement},
url = {https://jornadasmoma6.blogs.upv.es/},
year = {2018}
}