1. Laser-induced elastic wave classification: thermoelastic versus ablative regimes for all-optical elastography applications

    Laser-induced elastic wave classification: thermoelastic versus ablative regimes for all-optical elastography applications

    Significance : Shear wave optical coherence elastography is an emerging technique for characterizing tissue biomechanics that relies on the generation of elastic waves to obtain the mechanical contrast. Various techniques, such as contact, acoustic, and pneumatic methods, have been used to induce elastic waves. However, the lack of higher-frequency components within the elastic wave restricts their use in thin samples. The methods also require moving parts and/or tubing, which therefore limits the extent to which they can be miniaturized. Aim : To overcome these limitations, we propose an all-optical approach using photothermal excitation. Depending on the absorption coefficient of the sample ...

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