“Compton imaging technology has made new progress in the field of hot spot positioning in nuclear facilities, and a double-layer separated Compton camera has been developed to achieve far-field 3D imaging function testing. The system has an adjustable structure, low cost, wide imaging field of view, and an energy resolution of about 3%. It can determine the three-dimensional position information of a 137Cs point source 5 meters away. The optimized system has an angular resolution of about 10 ° for the front cone angle θ and lateral azimuth angle φ.”