Solving an inverse acousto-elastic scattering problems by combining full-waveform redatuming and time reversal

The aim of this paper is to propose a new method to solve the inverse scattering problem in a non homogeneous elastic medium, from data recorded in an acoustic medium. We aim to determine the Young modulus of elastic unknown inclusions, i.e. not observable solid objects, located in the elastic medium, from partial aperture boundary measurements. This approach combines a time-reversal approach and redatuming - a technique that consists in virtually moving the sensors from the original acquisition location to an arbitrary position - which allows to reduce the size of the inspected medium. Thanks to this strategy, we can recover the properties of the scatterer, this technique being also relatively insensitive to noise in the data. (C) 2021 Elsevier Inc. All rights reserved.

Automated summary

This paper proposes a new method to solve the inverse scattering problem in a non-homogeneous elastic medium using data recorded in an acoustic medium. By combining time-reversal and redatuming techniques, it is possible to reduce the size of the inspected medium and recover the properties of the scatterer, with relative insensitivity to noise in the data.