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Characterizing the behavior of scattered radiation in multi-energy x-ray imaging

Publié le 29 mars 2018
Characterizing the behavior of scattered radiation in multi-energy x-ray imaging
Auteurs
Sossin A., Rebuffel V., Tabary J., Létang J.M., Freud N., Verger L.
Year2017-0201
Source-TitleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Affiliations
CEA-LETI MINATEC Grenoble, Grenoble, France, Univ Lyon, INSA-Lyon, Université Lyon 1, UJM-Saint Etienne, CNRS, Inserm, Centre Léon Bérard, CREATIS UMR 5220 U1206, Lyon, France
Abstract
Scattered radiation results in various undesirable effects in medical diagnostics, non-destructive testing (NDT) and security x-ray imaging. Despite numerous studies characterizing this phenomenon and its effects, the knowledge of its behavior in the energy domain remains limited. The present study aims at summarizing some key insights on scattered radiation originating from the inspected object. In addition, various simulations and experiments with limited collimation on both simplified and realistic phantoms were conducted in order to study scatter behavior in multi-energy x-ray imaging. Results showed that the spectrum shape of the scatter component can be considered preserved in the first approximation across the image plane for various acquisition geometries and phantoms. The variations exhibited by the scatter spectrum were below 10% for most examined cases. Furthermore, the corresponding spectrum shape proved to be also relatively invariant for different experimental angular projections of one of the examined phantoms. The observed property of scattered radiation can potentially lead to the decoupling of spatial and energy scatter components, which can in turn enable speed ups in scatter simulations and reduce the complexity of scatter correction. © 2017 Elsevier B.V.
Author-Keywords
Experiments, Multi-energy, Simulation, X-ray scatter
Index-Keywords
Diagnosis, Experiments, Medical imaging, Nondestructive examination, X ray analysis, X ray scattering, Acquisition geometry, Medical diagnostics, Multi energy, Multi-energy x-rays, Non destructive testing, Scattered radiations, Simulation, Undesirable effects, Radiation effects
ISSN1689002
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