Aberration correction using moving particles speckle noise for ultrafast ultrasonic imaging

The correction of sound speed heterogeneities is an important problem in trans-skull and deep organs imaging. Among all the proposed adaptive focusing methods, time reversal is an elegant one that enables to know the Green´s function between the ultrasonic array and a punctual scatterer. However, in the absence of strong well resolved scatterers, time reversal is not useful. In this work we propose to use the echoes coming from moving particles in a flow to generate a virtual point-like scatterer and focus on it by iterative time reversal. This method enables to focus adaptively anywhere a flow is present. Then we use the Green´s function to correct the ultrasound images. First, we apply this technique using focused wave then to improve it, we use the ultrafast plane wave imaging and synthetic focusing.