A system and method for overlaying computer-generated highlights in a display of millimeter wave imagery is disclosed. In a particular embodiment, visible spectrum and algorithmically created images are displayed adjacent to corresponding millimeter wave imagery on a graphical user interface (GUI). The millimeter wave imagery is used to detect a threat such as a concealed object. A computer generated highlight coinciding with a location of the detected concealed object is used to automatically overlay at least one or more of the visible spectrum images, algorithmically created images, and millimeter wave imagery. The computer generated highlight is encoded with information valuable for aiding the user when viewing and assessing the image date.