Imaging Ruptures with Elastography

Elastography is a technique based on ultrasonic waves propagating in a soft solid characterized by a large contrast between V_P and V_S, such as the human body or a gel of PVA.
The friction of the gel at its contact interface induces deformation and slip patterns (ruptures) that are captured by the rapid shooting of ultrasonic waves diffracted by the billions of cellulose particles inside the gel. The step by step correlation of the speckle allows the retrieval of the details of the rupture propagation and the wavefield inside the gel.