Title: Stochastic image reconstruction for a dual-particle imaging system
Authors: HAMEL MichaelPOLACK KPOITRASSON-RIVIERE AlexisFLASKA MarekCLARKE Shaun D.POZZI SaraTOMANIN ALICEPEERANI Paolo
Citation: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT vol. 810 p. 120-131
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2016
JRC N°: JRC96393
ISSN: 0168-9002
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC96393
DOI: 10.1016/j.nima.2015.12.002
Type: Articles in periodicals and books
Abstract: Stochastic image reconstruction has been applied to a dual-particle imaging system used for nuclear safeguards applications. The dual-particle imager (DPI) is a combined Compton-scatter and neutron-scatter camera capable of producing separate neutron and photon images. The stochastic origin ensembles (SOE) method has been chosen for fast image reconstruction times compared to list-mode maximum-likelihood estimation-maximization and because no estimation of system response parameters is required. This work contains SOE image reconstructions for a 252Cf point source, two mixed-oxide (MOX) fuel canisters representing point sources, and the MOX fuel canisters representing a distributed source. Simulation of the DPI using MCNPX-PoliMi is validated by comparison of simulated and measured results. Because the quality of a reconstructed SOE image strongly relies on the number of counts and iterations used, the relationship between these quantities is investigated by examining the convergence of an image over many trials.
JRC Directorate:Nuclear Safety and Security

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