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Proceedings Paper

Distinguishing materials in inspected objects by digital radiography
Author(s): V. Ryzhikov; O. Lysetska; A. Opolonin; V. Danilenko; S. Galkin; E. Voronkin; S. A. Kostyukevich
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Paper Abstract

We used detector arrays of types "scintillator-photodiode" (S-PD) and scintillator-photoreceiving device (PRD). In non-destructive testing systems using S-PD arrays it is possible to use scintillators of different atomic number and density, which allows functioning in the energy range from 20 keV to 10 MeV, i.e., steel equivalent thickness I from 100μm to 300mm. For different objects and different purposes, different types of detector arrays and methods of control can be recommended. Results of experimental studies of detector arrays S-PD and S-PRD used for X-ray digital radiography have shown that there exist further possibilities to increase spatial resolution of this system for up to 2-3 line pairs per mm. It was investigated experimental results with used two array detectors for low-energy and high - energy detections (HED and LED). It is show in principle to distinguish not only organic from inorganic materials, but so as safety organic from explosive. Our aim was to show (theoretically and experimentally) that is could be possible to substantially increase the accuracy of separation of substances in the inspected object by their atomic number, as well as to increase the sensitivity of the method as a whole by using a multi-energy approach and detectors that have substantially different sensibility in the low-and high-energy range of the X-ray emitter spectrum. It was show the possibility to distinct materials with effective atomic number difference about 10-15%. It can be used in inspection systems, including anti-terrorist activities, in technical diagnostics, medicine.

Paper Details

Date Published: 16 September 2005
PDF: 9 pages
Proc. SPIE 5922, Hard X-Ray and Gamma-Ray Detector Physics VII, 592211 (16 September 2005); doi: 10.1117/12.621867
Show Author Affiliations
V. Ryzhikov, STC Institute for Single Crystals (Ukraine)
O. Lysetska, STC Institute for Single Crystals (Ukraine)
A. Opolonin, STC Institute for Single Crystals (Ukraine)
V. Danilenko, STC Institute for Single Crystals (Ukraine)
S. Galkin, STC Institute for Single Crystals (Ukraine)
E. Voronkin, STC Institute for Single Crystals (Ukraine)
S. A. Kostyukevich, STC Institute for Single Crystals (Ukraine)

Published in SPIE Proceedings Vol. 5922:
Hard X-Ray and Gamma-Ray Detector Physics VII
Ralph B. James; Larry A. Franks; Arnold Burger, Editor(s)

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