Quantitative ultrasound techniques have been previously used to evaluate biological hard tissues, characterized by a large acoustic impedance contrast. Here, we are interested in the imaging of experimental data from different test-targets with high acoustic impedance contrast, using the Full Waveform Inversion (FWI) method to solve the inverse problem. This method is based on high-resolution numerical modeling of the forward problem of interaction between waves and medium, considering the full time series. To reduce the complexity of the numerical implementation, the model considers a fluid medium. Therefore, the aim is to evaluate the precision of the reconstruction under this assumption for materials with a different level of attenuation of shear waves, to study the limits of this hypothesis. Images of the sound speed obtained using the experimental data are presented, and the precision of the reconstruction is evaluated. Future work should include viscoelastic materials.

定量超声技术以前已用于评估生物硬组织，其特点是声阻抗对比度大。在这里，我们对来自不同测试目标的具有高声阻抗对比度的实验数据的成像感兴趣，使用全波形反演 (FWI) 方法来解决反演问题。该方法基于波与介质相互作用的正向问题的高分辨率数值建模，考虑了完整的时间序列。为了降低数值实现的复杂性，该模型考虑了流体介质。因此，目的是评估具有不同剪切波衰减水平的材料在此假设下重建的精度，以研究该假设的局限性。呈现使用实验数据获得的声速图像，并评估重建的精度。未来的工作应该包括粘弹性材料。