1. An ultrasound imaging console, comprising: a beamformer that beamforms ultrasound echoes from an ultrasound transducer array of an ultrasound imaging system to produce at least a pair of consecutive frames of sets of scan lines; a pre-processor that pre-processes each of the frames to produce a pair of pre-processed frames, including a first frame and a second subsequent frame; a processor that: compresses an envelope of each of the first and second frames; estimates a mean frequency of the compressed first frame, calculates a cross correlation between the pair of compressed frames at a set of lags; determines a phase of the cross correlation; removes glitches in the phase; unwraps the de-glitched phase; converts the unwrapped phase to a motion estimate using the mean frequency; fits a surface to the motion estimate; quantizes the fitted motion estimate to determine a subsequent set of lags; generates an elastography image with the motion estimate in response to a difference between the set of lags and the subsequent set of lags satisfying predetermined difference criteria; and visually presents the elastography image.