Abstract
In echographic mode, as a reflective point-like target backscatters a pulsed wave, the presence of an aberrating layer in the medium usually generates diffraction effects. If this layer is close to the recording transducer array, diffraction does not occur and the medium can even be considered as homogeneous by using an adaptive technique based on time shift compensation. On the other hand, through media including a distant aberrating layer, the diffraction provided between the layer and the array results in a wavefield distorted in phase and amplitude. Time reversal has been presented as an original way to focus on a reflective target in such media 12,3’4.
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References
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Dorme, C., Fink, M. (1996). Matched Filter Imaging Through Inhomogeneous Media. In: Tortoli, P., Masotti, L. (eds) Acoustical Imaging. Acoustical Imaging, vol 22. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-8772-3_1
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DOI: https://doi.org/10.1007/978-1-4419-8772-3_1
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