An ultrasound breast imaging system at central frequency of 4.5 MHz was implemented comprising sensors with a wide lateral radiation field distributed on a ring with respect the breast physiology. The temporal convolution function was used to define the maximum spatial resemblance between two received signals. This made it possible to quantify the ultrasonic intensity coupled, by impedance breakdown, to a suspicious cellular biomass. This pathway was explored for ultrasound speckle location delineating the boundaries of the region of interest (ROI). The signal-shaping factor and the relative weight of the gamma mixture led to the delineation of regions containing suspicious boundaries.