Fig. 1.

(a) Setup with linear array probe for both imaging and transmission of a focused ultrasonic beam for acoustic radiation force (ARF) generation. (b) The signal from a point absorber is shifted in axial direction when comparing OA images acquired pre and post ARF push. The images show the 2D point-spread function (PSF) originating from the point absorber, as well as the axial profile of the PSF along the dashed lines. (c) In a difference image the point absorber's signal shows up as a slightly changed PSF.