Print Email Facebook Twitter A Marchenko equation for acoustic inverse source problems Title A Marchenko equation for acoustic inverse source problems Author van der Neut, J.R. (TU Delft Applied Geophysics and Petrophysics) Johnson, Jami L. (The University of Auckland) van Wijk, K. (The University of Auckland) Singh, S. (University of Edinburgh) Slob, E.C. (TU Delft Applied Geophysics and Petrophysics) Wapenaar, C.P.A. (TU Delft Applied Geophysics and Petrophysics) Date 2017-06 Abstract From acoustics to medical imaging and seismology, one strives to make inferences about the structure of complex media from acoustic wave observations. This study proposes a solution that is derived from the multidimensional Marchenko equation, to learn about the acoustic source distribution inside a volume, given a set of observations outside the volume. Traditionally, this problem has been solved by backpropagation of the recorded signals. However, to achieve accurate results through backpropagation, a detailed model of the medium should be known and observations should be collected along a boundary that completely encloses the volume of excitation. In practice, these requirements are often not fulfilled and artifacts can emerge, especially in the presence of strong contrasts in the medium. On the contrary, the proposed methodology can be applied with a single observation boundary only, without the need of a detailed model. In order to achieve this, additional multi-offset ultrasound reflection data must be acquired at the observation boundary. The methodology is illustrated with one-dimensional synthetics of a photoacoustic imaging experiment. A distribution of simultaneously acting sources is recovered in the presence of sharp density perturbations both below and above the embedded sources, which result in significant scattering that complicates the use of conventional methods. To reference this document use: http://resolver.tudelft.nl/uuid:0ec47f8d-06ec-4d2a-8cb6-2532fb2cd38c DOI https://doi.org/10.1121/1.4984272 Embargo date 2017-12-31 ISSN 0001-4966 Source The Journal of the Acoustical Society of America, 141 (6), 4332-4346 Part of collection Institutional Repository Document type journal article Rights © 2017 J.R. van der Neut, Jami L. Johnson, K. van Wijk, S. Singh, E.C. Slob, C.P.A. Wapenaar Files PDF 1.4984272.pdf 1.7 MB Close viewer /islandora/object/uuid:0ec47f8d-06ec-4d2a-8cb6-2532fb2cd38c/datastream/OBJ/view