HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

A time reversal algorithm in acoustic media with Dirac measure approximations

Abstract : This article is devoted to the study of a photoacoustic tomography model, where one is led to consider the solution of the acoustic wave equation with a source term writing as a separated variables function in time and space, whose temporal component is in some sense close to the derivative of the Dirac distribution at t  =  0. This models a continuous wave laser illumination performed during a short interval of time. We introduce an algorithm for reconstructing the space component of the source term from the measure of the solution recorded by sensors during a time T all along the boundary of a connected bounded domain. It is based at the same time on the introduction of an auxiliary equivalent Cauchy problem allowing to derive explicit reconstruction formula and then to use of a deconvolution procedure. Numerical simulations illustrate our approach. Finally, this algorithm is also extended to elasticity wave systems.
Document type :
Journal articles
Complete list of metadata

Contributor : Elie Bretin Connect in order to contact the contributor
Submitted on : Monday, September 3, 2018 - 4:32:42 PM
Last modification on : Tuesday, January 11, 2022 - 5:56:35 PM

Links full text



Elie Bretin, Carine Lucas, Yannick Privat. A time reversal algorithm in acoustic media with Dirac measure approximations. Inverse Problems, IOP Publishing, 2018, 34 (4), ⟨10.1088/1361-6420/aaaca9⟩. ⟨hal-01866862⟩



Record views