MIXED REALITY VISUALIZATION OF RADIATION IMAGES FOR
NUCLEAR INSPECTION

Mixed reality technologies using head-mounted devices promise an intuitive way of presenting complex data directly as holographic visual impressions to a user. We discuss the potential application of such a device, the Microsoft HoloLens2, with the information obtained from a neutron and gamma-ray imaging detector in the context of nuclear safeguards. The detector used is the Handheld Dual Particle Imager (H2DPI) developed at the University of Michigan. It utilizes a compact array of organic scintillators (organic glass or stilbene) and inorganic scintillators (CeBr3) set in a geometry optimized for radiation imaging, i.e., the system registers double scatter events in two detector volumes and reconstructs the radiation incidence direction via backprojection algorithms. The thereby obtained radiation images are typically interpreted on computer screen, in diagrams showing intensity over angular space around the detector. We present recent developments in translating said angular information into the HoloLens2 smart glasses, thus reducing the user’s interpretation requirements and potentially providing a more intuitive impression of the radiation source location. The HoloLens2 provides a real time spatial mesh of its surroundings from cameras and depth sensors which we intersect with the radiation image to create a 3D impression of where radiation is streaming from. We discuss the implementation from detector signals to mixed reality visualization and speculate as to how mixed reality technology could be incorporated into inspection scenarios to improve workflow and lower radiation exposure.