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Proceedings Paper

Development of receiving-detecting circuit for digital radiographic systems with improved spatial resolution
Author(s): Volodymir D. Ryzhikov; Oleksandr D. Opolonin; Serhiy M. Galkin; Yevheniy F. Voronkin; Olena K. Lysetska; Serhiy A. Kostyukevych
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Paper Abstract

Detection of X-ray radiation by digital radiographic systems (DRS) is realized using multi-element detector arrays of scintillator-photodiode (S-PD) type. Accounting for our experience in development of X-ray introscopy systems, possibilities can be found for improvement of DRS detection efficiency. Namely, a more efficient use of the dynamic range of the analog-to-digit converter by means of instrumental compensation of scatter of detector characteristics and smaller apertures of individual detection channels. However, smaller apertures lead to lower levels of useful signals, and a problem emerges of signal interference over neighboring channels, which is related to optical separation of the scintillation elements. Also, more compact arrangement of electronic components of preamplifiers is achieved. The latter problem is solved by using multi-channel (from 32 to 1024 channels) photoreceiving devices (PRD). PRD has a set of photosensitive elements formed on one crystal, as well as shift registers ensuring preliminary amplification of signals and series connection to one outlet. The work envisages creation of receiving-detecting circuit (RDC) with improved spatial resolution (ISR) with the aim of producing advanced DRS with improved characteristics: density resolution better than 0.9%, and detecting ability allowing detection of θ 0.5 mm steel wire behind 6 mm steel. The work will result in the development of RDC with ISR (800-200 microns). In combination with various ionizing radiation sources and scanning mechanisms this will allow creation of DRS for many tasks of non-destructive testing (NDT) and technical diagnostics (TD), in particular, for check-up of pipelines, objects of oil and gas industries, etc. This work was supported by the Ministry of Education and Science of Ukraine, the U.S. Civilian Research and Development Foundation (CRDF), and by the NATO Science for Peace and Security Program (Project SfP-982823).

Paper Details

Date Published: 11 September 2009
PDF: 6 pages
Proc. SPIE 7450, Penetrating Radiation Systems and Applications X, 74500J (11 September 2009); doi: 10.1117/12.824016
Show Author Affiliations
Volodymir D. Ryzhikov, Institute for Single Crystals (Ukraine)
Oleksandr D. Opolonin, Institute for Single Crystals (Ukraine)
Serhiy M. Galkin, Institute for Single Crystals (Ukraine)
Yevheniy F. Voronkin, Institute for Single Crystals (Ukraine)
Olena K. Lysetska, Institute for Single Crystals (Ukraine)
Serhiy A. Kostyukevych, Institute of Semiconductor Physics (Ukraine)

Published in SPIE Proceedings Vol. 7450:
Penetrating Radiation Systems and Applications X
F. Patrick Doty; H. Bradford Barber; Hans Roehrig; Richard C. Schirato, Editor(s)

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