Evaluation of novel gamma ray imaging technology
Loading...
Date
2017-08-09
Journal Title
Journal ISSN
Volume Title
Publisher
Australasian Radiation Protection Society
Abstract
We present the imaging results from a novel single pixel gamma-ray imaging system, developed at ANSTO, which is capable of providing quantitative, spectroscopic gamma images using a fast and efficient imaging
methodology. Gamma ray imaging can assist in surveying active areas by providing information of the
radiation environment in areas which are hard to reach (e.g. in enclosed spaces or at height) and by gaining valuable information about the radiation environment whist limiting exposure to personnel in high dose rate environments. The system design provides a large field of view (360° × 70°) and covers a wide energy range of 40 keV to 1.5 MeV. The gamma ray image is overlaid on a 360° panoramic optical image of the scene, which allows for easy location of the gamma emitting radionuclides that are present. By selecting different regions
of interest in the recorded gamma spectrum, separate radionuclide specific images, of the area being surveyed, can be visualised. Calibration of the detector allows for quantitative mapping of where each component of the dose rate at the detector originates. This can be converted into activity with a priori knowledge of the scene geometry. Gamma-ray images have been experimentally obtained for both point sources and extended
sources in controlled testing environments and these results will be presented. The imaging results from a range of real world operational environments, around the ANSTO site, will be presented and demonstrate the systems capability for locating sources of radiation in nuclear industry applications.
Description
Keywords
Images, Gamma cameras, Radioisotope scanners, ANSTO, Radiation doses, Dose rates, Dose limits, MeV range, Radioisotopes, Calibration, Nuclear industry
Citation
Guenette, M., Boardman, D., Sarbutt, A., Flynn, A., & Prokopovich, D. (2017). Evaluation of novel gamma ray imaging technology. Paper presented to the APRS2017 Conference: "Science and the art of radiation protection: broadening the horizon", Novotel Wollongong Northbeach, Wollongong, NSW, 6-9 August 2017. (pp. 60-61).