1. A dual mode ultrasound imaging system comprising: an ultrasound probe configured to acquire shear-wave data during a shear-wave mode and strain data during a strain mode for a region of interest (ROI), wherein the shear-wave data is acquired at a different time relative to the strain data by the ultrasound probe; a diagnostic circuit configured to generate a shear-wave image and a strain image from the shear-wave data and the strain data, respectively; and a display concurrently displays the shear-wave image and the strain image.