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An X-ray scatter system for material identification in cluttered objects: A Monte Carlo simulation study

Publication ,  Journal Article
Lakshmanan, MN; Kapadia, AJ; Sahbaee, P; Wolter, SD; Harrawood, BP; Brady, D; Samei, E
Published in: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
September 15, 2014

The analysis of X-ray scatter patterns has been demonstrated as an effective method of identifying specific materials in mixed object environments, for both biological and non-biological applications. Here we describe an X-ray scatter imaging system for material identification in cluttered objects and investigate its performance using a large-scale Monte Carlo simulation study of one-thousand objects containing a broad array of materials. The Geant4 Monte Carlo source code for Rayleigh scatter physics was modified to model coherent scatter diffraction in bulk materials based on experimentally measured form factors for 33 materials. The simulation was then used to model coherent scatter signals from a variety of targets and clutter (background) materials in one thousand randomized objects. The resulting scatter images were used to characterize four parameters of the imaging system that affected its ability to identify target materials: (a) the arrangement of materials in the object, (b) clutter attenuation, (c) type of target material, and (d) the X-ray tube current. We found that the positioning of target materials within the object did not significantly affect their detectability; however, a strong negative correlation was observed between the target detectability and the clutter attenuation of the object. The imaging signal was also found to be relatively invariant to increases in X-ray tube current above 1 mAs for most materials considered in the study. This work is the first Monte Carlo study to our knowledge of a large population of cluttered object of an X-ray scatter imaging system for material identification and lays the foundation for large-scale studies of the effectiveness of X-ray scatter imaging systems for material identification in complex samples. © 2014 Elsevier B.V. All rights reserved.

Duke Scholars

Published In

Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

DOI

ISSN

0168-583X

Publication Date

September 15, 2014

Volume

335

Start / End Page

31 / 38

Related Subject Headings

  • Applied Physics
  • 5106 Nuclear and plasma physics
  • 5104 Condensed matter physics
  • 0915 Interdisciplinary Engineering
  • 0402 Geochemistry
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

Citation

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Lakshmanan, M. N., Kapadia, A. J., Sahbaee, P., Wolter, S. D., Harrawood, B. P., Brady, D., & Samei, E. (2014). An X-ray scatter system for material identification in cluttered objects: A Monte Carlo simulation study. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 335, 31–38. https://doi.org/10.1016/j.nimb.2014.05.021
Lakshmanan, M. N., A. J. Kapadia, P. Sahbaee, S. D. Wolter, B. P. Harrawood, D. Brady, and E. Samei. “An X-ray scatter system for material identification in cluttered objects: A Monte Carlo simulation study.” Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 335 (September 15, 2014): 31–38. https://doi.org/10.1016/j.nimb.2014.05.021.
Lakshmanan MN, Kapadia AJ, Sahbaee P, Wolter SD, Harrawood BP, Brady D, et al. An X-ray scatter system for material identification in cluttered objects: A Monte Carlo simulation study. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2014 Sep 15;335:31–8.
Lakshmanan, M. N., et al. “An X-ray scatter system for material identification in cluttered objects: A Monte Carlo simulation study.” Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, vol. 335, Sept. 2014, pp. 31–38. Scopus, doi:10.1016/j.nimb.2014.05.021.
Lakshmanan MN, Kapadia AJ, Sahbaee P, Wolter SD, Harrawood BP, Brady D, Samei E. An X-ray scatter system for material identification in cluttered objects: A Monte Carlo simulation study. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2014 Sep 15;335:31–38.
Journal cover image

Published In

Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

DOI

ISSN

0168-583X

Publication Date

September 15, 2014

Volume

335

Start / End Page

31 / 38

Related Subject Headings

  • Applied Physics
  • 5106 Nuclear and plasma physics
  • 5104 Condensed matter physics
  • 0915 Interdisciplinary Engineering
  • 0402 Geochemistry
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics