Visualization of radiation information using an integrated Radiation Imaging System (iRIS)

統合型放射線イメージングシステムiRISを用いた放射線情報の可視化

佐藤 優樹  

Sato, Yuki

In this presentation, the concept of an integrated Radiation Imaging System (iRIS) and its demonstration will be presented. The iRIS concept combines radiation measurement technology with elemental technologies such as SLAM, data visualization, robotics, and xR to remotely measure the distribution of radioactive substances and dose rate information, and visualize it in 3D. In a radiation environment such as the Fukushima Daiichi Nuclear Power Station (FDNPS), visualization of these radiation information will contribute to the reduction of worker exposure and work planning. As one of the demonstration examples, a visualization test of highly radioactive contamination was conducted near the Unit 1/2 exhaust stack of the FDNPS. Using a combination of a compact Compton camera and SLAM technology based on 3D-LiDAR, the author succeeded in drawing a 3-D map of the entire working environment visualizing the high level of radioactive contamination in the lower part of the exhaust stack using data acquired while moving. In addition, information on the dose rate along the system's moving trajectory was recorded on the 3-D map. In addition, by importing the 3-D map into a VR system and using a commercially available VR head-mounted display, users can experience a working environment that displays a highly contaminated part regardless of their location. Furthermore, a technology to visualize images of radioactive substances acquired by gamma-ray imagers in real space using AR technology has been developed, and verification tests are underway. Currently, the author is constructing a system that enables verification of the effectiveness of shielding and decontamination against radioactive substances in a virtual space by using the 3-D map that visualizes information on highly contaminated part and dose rates. In other words, this is an attempt to build a digital twin of the radiation work environment based on the iRIS concept.