A Spherical Active Coded Aperture for 4\pi Gamma-Ray Imaging

Gamma-ray imaging facilitates the efficient detection, characterization, and localization of compact radioactive sources in cluttered environments. Fieldable detector systems employing active planar coded apertures have demonstrated broad energy sensitivity via both coded aperture and Compton imagin...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2017-11, Vol.64 (11), p.2837-2842
Main Authors: Hellfeld, Daniel, Barton, Paul, Gunter, Donald, Mihailescu, Lucian, Vetter, Kai
Format: Article
Language:English
Subjects:
4pi image reconstruction
4π image reconstruction
active coded aperture
Aperture
Apertures
Cadmium zinc tellurides
Configurations
Detectors
Energy
Field of view
Gamma rays
gamma-ray imaging
Imaging
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Localization
Optimization
Optimization techniques
Sensitivity
spherical coded aperture
Three-dimensional displays
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Description
Summary:Gamma-ray imaging facilitates the efficient detection, characterization, and localization of compact radioactive sources in cluttered environments. Fieldable detector systems employing active planar coded apertures have demonstrated broad energy sensitivity via both coded aperture and Compton imaging modalities. However, planar configurations suffer from a limited field of view, especially in the coded aperture mode. To improve upon this limitation, we introduce a novel design by rearranging the detectors into an active coded spherical configuration, resulting in a 4π isotropic field of view for both coded aperture and Compton imaging. This paper focuses on the low-energy coded aperture modality and the optimization techniques used to determine the optimal number and configuration of 1-cm 3 CdZnTe coplanar grid detectors on a 14-cm diameter sphere with 192 available detector locations.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2017.2755982