13 September 2011 Detector array with improved spatial resolution for digital radiographic system
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Abstract
The film radiographic inspection remains among the most reliable methods for inspection of pipelines and metalwares. The worldwide trend of transition from film radiography to digital radiography requires creation of advanced digital radiography systems. The main direction of digital radiography systems development is improvement of spatial resolution. The pixel size of the X-ray film is several microns, while solid-state detector pixels have dimensions of several hundred or several thousand microns. For the most common detectors of "scintillator-photodiode" type, it is impossible in principle to obtain the film pixel sizes. However, the detecting ability for substances that differ by their density and atomic number achieved using "scintillator-photodiode" detectors is by several orders higher. Using a standard experiment scheme with dual-energy detector arrays, our aim was to show that it could be possible to substantially increase the accuracy of supervision of the inspected object. For obtaining shadow X-ray images, a receiving-detecting circuit with a detector array was developed for 200 mm scanning field. Using model digital radiographic systems and standard testing we have evaluated spatial resolution (not worse than 1.25 line pairs/mm) and detecting ability (better than 0.2 mm steel wire behind 6 mm steel).
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Volodymyr D. Ryzhikov, Volodymyr D. Ryzhikov, Oleksandr D. Opolonin, Oleksandr D. Opolonin, Serhiy M. Galkin, Serhiy M. Galkin, Volodymyr G. Volkov, Volodymyr G. Volkov, Olena K. Lysetska, Olena K. Lysetska, Serhiy A. Kostioukevitch, Serhiy A. Kostioukevitch, } "Detector array with improved spatial resolution for digital radiographic system", Proc. SPIE 8142, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII, 81421C (13 September 2011); doi: 10.1117/12.892545; https://doi.org/10.1117/12.892545
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