Reducing environmental scattering in industrial computed tomography by system redesign

X-ray tomographic image quality is degraded by radiation scattered in the sample and the environment. In this paper, a computed tomography (CT) system with 450kV source is optimized for low environmental scattering. Monte Carlo simulations of different CT-configurations predict a reduction of enviro...

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Bibliographic Details
Published in:	NDT & E international : independent nondestructive testing and evaluation Vol. 58; pp. 36 - 42
Main Authors:	Schuetz, P., Miceli, A., Jerjen, I., Flisch, A., Hofmann, J., Broennimann, R., Sennhauser, U.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-09-2013
Subjects:	Cone beam computed tomography Environmental scattering GEANT4 Monte Carlo simulations X-ray scattering GEANT4 X-ray scattering Monte Carlo simulations Cone beam computed tomography Environmental scattering
Online Access:	Get full text
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Summary:	X-ray tomographic image quality is degraded by radiation scattered in the sample and the environment. In this paper, a computed tomography (CT) system with 450kV source is optimized for low environmental scattering. Monte Carlo simulations of different CT-configurations predict a reduction of environmental scattering by (81±4)%. An optimized setup is characterized by a large detector housing from thin composite plates, a thin mirror, and cabin walls lined with metallic plates. In radiography experiments, the contrast improves by (22±2)% for 50mm thick aluminium objects and by (35±4)% for 160mm thick aluminium parts. The improvement in tomographic imaging matches the radiography results.
ISSN:	0963-8695 1879-1174
DOI:	10.1016/j.ndteint.2013.04.005