1. A method for imaging a region of interest using a pulse-echo imaging device, comprising: generating a stabilized symmetric pulse with a pulse-echo imaging device; directing the symmetric pulse to be incident on a region of interest, thereby producing a reflected echo; receiving the reflected echo with the pulse-echo imaging device; applying an inverse filter to the reflected echo to form inverse-filtered echo data, wherein the inverse filter is a stable inverse filter corresponding to the symmetric pulse; and creating an image of the region of interest from the inverse-filtered echo data.