TY - GEN
T1 - Time reversal methods in acousto-elastodynamics
AU - Assous, Franck
AU - Lin, Moshe
N1 - Publisher Copyright:
Copyright © The Authors.
PY - 2021
Y1 - 2021
N2 - The aim of the article is to solve an inverse problem in order to determine the presence and some properties of an elastic “inclusion” (an unknown object, characterized by elastic properties discriminant from the surrounding medium) from partial observations of acoustic waves, scattered by the inclusion. The method will require developing techniques based on Time Reversal methods. A finite element method based on variational acousto-elastodynamics formulation will be derived and used to solve to solve the forward, and then, the time reversed problem. A criterion, derived from the reverse time migration framework, is introduced, to help use to construct images of the inclusions to be determined. Our approach will be applied to configurations modeling breast cancer detection, using simulated ultrasound waves.
AB - The aim of the article is to solve an inverse problem in order to determine the presence and some properties of an elastic “inclusion” (an unknown object, characterized by elastic properties discriminant from the surrounding medium) from partial observations of acoustic waves, scattered by the inclusion. The method will require developing techniques based on Time Reversal methods. A finite element method based on variational acousto-elastodynamics formulation will be derived and used to solve to solve the forward, and then, the time reversed problem. A criterion, derived from the reverse time migration framework, is introduced, to help use to construct images of the inclusions to be determined. Our approach will be applied to configurations modeling breast cancer detection, using simulated ultrasound waves.
KW - Elastic waves
KW - Elastodynamics
KW - Finite element
KW - Inverse problems
KW - Time reversal
KW - Wave propagation
UR - http://www.scopus.com/inward/record.url?scp=85102100050&partnerID=8YFLogxK
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AN - SCOPUS:85102100050
T3 - 8th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2019
SP - 743
EP - 750
BT - 8th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2019
A2 - Onate, Eugenio
A2 - Papadrakakis, Manolis
A2 - Schrefler, Bernhard A.
T2 - 8th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2019
Y2 - 3 June 2019 through 5 June 2019
ER -