A system for overlaying location information of a radiation source onto a current image of an area being monitored. The system is capable of integrating data from various detectors and cameras has been developed to aid in tracking a radiation source. Location information, derived from various detectors, is integrated with near real-time videos of an area being monitored to show clearly where a radiation source is likely located within the area being monitored.
 The United States Government has rights in this invention pursuant to Contract No. DE-AC02-06CH11357 between the United States Government and the UChicago Argonne, LLC, representing Argonne National Laboratory.