Improved Gamma-Ray Point Source Quantification in Three Dimensions by Modeling Attenuation in the Scene Article Swipe
Mark S. Bandstra
,
Daniel Hellfeld
,
Jayson R. Vavrek
,
Brian J. Quiter
,
K. Meehan
,
Paul Barton
,
Joshua W. Cates
,
A. Moran
,
Victor Negut
,
Ryan Pavlovsky
,
Tenzing H. Y. Joshi
·
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.1109/tns.2021.3113588
YOU?
·
· 2021
· Open Access
·
· DOI: https://doi.org/10.1109/tns.2021.3113588
Using a series of detector measurements taken at different locations to localize a source of radiation is a well-studied problem. The source of radiation is sometimes constrained to a single point-like source, in which case the location of the point source can be found using techniques such as maximum likelihood. Recent advancements have shown the ability to locate point sources in 2D and even 3D, but few have studied the effect of intervening material on the problem. In this work we examine gamma-ray data taken from a freely moving system and develop voxelized 3-D models of the scene using data from the onboard LiDAR. Ray casting is used to compute the distance each gamma ray travels through the scene material, which is then used to calculate attenuation assuming a single attenuation coefficient for solids within the geometry. Parameter estimation using maximum likelihood is performed to simultaneously find the attenuation coefficient, source activity, and source position that best match the data. Using a simulation, we validate the ability of this method to reconstruct the true location and activity of a source, along with the true attenuation coefficient of the structure it is inside, and then we apply the method to measured data with sources and find good agreement.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- https://doi.org/10.1109/tns.2021.3113588
- OA Status
- green
- Cited By
- 3
- References
- 39
- Related Works
- 20
- OpenAlex ID
- https://openalex.org/W3158632748
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W3158632748Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1109/tns.2021.3113588Digital Object Identifier
- Title
-
Improved Gamma-Ray Point Source Quantification in Three Dimensions by Modeling Attenuation in the SceneWork title
- Type
-
preprintOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2021Year of publication
- Publication date
-
2021-09-27Full publication date if available
- Authors
-
Mark S. Bandstra, Daniel Hellfeld, Jayson R. Vavrek, Brian J. Quiter, K. Meehan, Paul Barton, Joshua W. Cates, A. Moran, Victor Negut, Ryan Pavlovsky, Tenzing H. Y. JoshiList of authors in order
- Landing page
-
https://doi.org/10.1109/tns.2021.3113588Publisher landing page
- Open access
-
YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
-
https://arxiv.org/pdf/2104.11318.pdfDirect OA link when available
- Concepts
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Attenuation, Point source, Attenuation coefficient, Point (geometry), Position (finance), Detector, Radiation, Computer science, Point location, Radioactive source, Ranging, Optics, Physics, Acoustics, Algorithm, Mathematics, Geometry, Telecommunications, Economics, FinanceTop concepts (fields/topics) attached by OpenAlex
- Cited by
-
3Total citation count in OpenAlex
- Citations by year (recent)
-
2025: 2, 2021: 1Per-year citation counts (last 5 years)
- References (count)
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39Number of works referenced by this work
- Related works (count)
-
20Other works algorithmically related by OpenAlex
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