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Longitudinal shear wave induced by a vibrator source. (a) Generation of a longitudinal shear wave. (b) Spatio–temporal OCT Doppler variance images at a given depth in 0.50% (left) and 0.75% (right) agar phantoms. The figure has been reprinted with permission from Zhu et al., 2017. Copyright © (2017) AIP (61).
