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Radiographic imaging represents a vital capability within non-destructive assessment, quality control and fundamental science. This study focuses on Gd2O2S:Tb3+ based scintillating composites incorporated into pixelated-metallic aperture screens, attached to amorphous silicon-based flat panels. Performance metrics are explored through coupled MCNP6- FRED simulations; here, scintillation light transport is investigated as a function of pixelated screen geometry and optical characteristics. For the first time, we demonstrate image acquisition with a 100 micron thick pixelated metallic aperture screen. The results demonstrate promising improvements to x-ray interaction rates while maintaining image quality.
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Brenden W. Wiggins, Cameron G. Richards, Don R. Johnson, Oliver Humbach, James F. Hunter, Markus P. Hehlen, "Developments in Gd2O2S based pixelated-metallic aperture arrays," Proc. SPIE 12047, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVI, 120470B (18 April 2022); https://doi.org/10.1117/12.2612719