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12 April 2021 Gratings-based phase contrast x-ray imaging: progress towards a prototype system for explosives detection
Erin A. Miller, Luke W. Campbell, Nikhil Deshmukh, Andrew J. Gilbert, Pavlo Ivanusa, Richard E. Jacob, Dustin M. Kasparek, Jonathan D. McCall, Elvin Munoz, Stanley L. Owsley Jr., Kurt L. Silvers, Timothy A. White, Richard S. Wittman, Mital A. Zalavadia
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Proceedings Volume 11738, Anomaly Detection and Imaging with X-Rays (ADIX) VI; 1173802 (2021) https://doi.org/10.1117/12.2589938
Event: SPIE Defense + Commercial Sensing, 2021, Online Only
Abstract
Gratings-based phase contrast x-ray imaging offers enhanced material information in an x-ray imaging measurement, a key consideration for improving performance in explosives detection. Application of phase contrast imaging to explosives detection requires addressing several key technical issues: identifying a patterning element (grating) that offers an appropriate tradeoff between sensitivity and robust operation at high energies, developing techniques that allow for quantitative interpretation of new signatures under a broad range of attenuation conditions, and designing a system that allows for rapid measurement while providing sufficient signal-to-noise. We present results illustrating the value of phase contrast x-ray signatures for explosives detection, and demonstrate the ability to obtain quantitative metrics in the presence of intervening materials. Finally, we demonstrate preliminary results from a gratings-based phase contrast system in a scanning configuration.
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Erin A. Miller, Luke W. Campbell, Nikhil Deshmukh, Andrew J. Gilbert, Pavlo Ivanusa, Richard E. Jacob, Dustin M. Kasparek, Jonathan D. McCall, Elvin Munoz, Stanley L. Owsley Jr., Kurt L. Silvers, Timothy A. White, Richard S. Wittman, and Mital A. Zalavadia "Gratings-based phase contrast x-ray imaging: progress towards a prototype system for explosives detection", Proc. SPIE 11738, Anomaly Detection and Imaging with X-Rays (ADIX) VI, 1173802 (12 April 2021); https://doi.org/10.1117/12.2589938
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KEYWORDS
Phase contrast
Explosives detection
Imaging systems
X-ray imaging
Prototyping
Optical design
Optical lithography
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