1. A method for estimating motion of an object of interest, comprising: reconstructing a set of one or more initial images using acquired data; identifying one or more regions of interest in the set of reconstructed initial images; applying at least a set of filters to the identified regions of interest to generate a sequence of filtered images, wherein each of the filtered images in the sequence comprises data acquired near a different reference point; and estimating a motion path for each region of interest based on one or more correspondences in the sequence of filtered images.