Reflection Measurement of the Scattering Mean Free Path at the Onset of Multiple Scattering

Antton Goïcoechea (1) , Cécile Brütt (2) , Arthur Le Ber (1) , Flavien Bureau (1) , William Lambert (3) , Claire Prada (1) , Arnaud Derode (1) , Alexandre Aubry (1)

1 IL - Institut Langevin - Ondes et Images (UMR7587)
2 Safran Tech
3 SuperSonic Imagine

Multiple scattering of waves presents challenges for imaging complex media but offers potential for their characterization. Its onset is actually governed by the scattering mean free path ℓs that provides crucial information on the medium micro-architecture. Here, we introduce a reflection matrix method designed to estimate this parameter from the time decay of the single scattering rate. Our method is first validated by means of an ultrasound experiment on a tissue-mimicking phantom. An in-vivo measurement of ℓs is then performed in the human liver. This study thus opens important perspectives for quantitative imaging whether it be for non-destructive testing or biomedical applications.

Domaines: Physique [physics]

Antton Goïcoechea, Cécile Brütt, Arthur Le Ber, Flavien Bureau, William Lambert, et al.. Reflection Measurement of the Scattering Mean Free Path at the Onset of Multiple Scattering. 2024. ⟨hal-04372441⟩