1. A computer-implemented method for processing an ultrasound image performed by a computerized device, the method comprising: segmenting tissue in a received ultrasound image, the ultrasound image comprising a plurality of pixels representing a tissue area; creating a mask of pixels around a central pixel in the tissue area, wherein the pixels in the mask are within a given decibel range of the central pixel and within a segmentation boundary; and assigning an attenuation to the central pixel by estimating the attenuation of the pixels in the mask, assuming that attenuation of the pixels in the mask is either uniform along the mask or constant across sequential segments along the mask.