A collaborative project that I worked on at The Citadel while an undergraduate electrical engineering student (senior design project).  The robot, designed and built by our team, autonomously scanned a room and made a spatial radiation map.  The REMbot returned to its starting position after mapping was complete for the user to download the data.  A PC would then create a radiation map (pictured below) with an algorithm also designed by our team.  Our paper is in a link below.

Radioactive Emissions Mapping Robot