P5D-1 Elasticity Estimation by Time-Reversal of Shear Waves

Time-reversal is an efficient way to focus a wave back to its source and has been investigated in a wide range of situations including telecommunication, non-destructive testing, interactivity and medical applications. In this work we propose a one channel time-reversal experiment of shear waves in soft solids with application to elasticity assessment. From a physical point of view, the experiment presents some interesting features like asymmetry of the refocused field due to near field effects. From the point of view of the application, the proposed method has some advantages with respect to the existing ones: it is independent of boundary conditions, shape of the employed source and excitation function. Limitations could arise for high attenuating media where the system is not time-invariant.