3D Modeling from Point Cloud Data for Radiation Transport Monte Carlo Simulation and Its Application to Radiation Source Finding

Abstract

A gamma detector/camera will receive both direct gamma radiation from a gamma source and scattered or shielded radiation from objects around the source. To consider the effects of scattering and shielding, it is useful to acquire an environment map around the detector using Simultaneous Localization and Mapping (SLAM), and to construct a 3D shape model for radiation transport Monte Carlo simulation from the 3D point cloud data of SLAM. This paper gives an overview of the 3D voxel modelling method and its application in the finding of 137Cs point sources using 4π gamma imaging.