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14 June 2023 Gratings-based phase contrast x-rays for security screening
Erin A. Miller, Luke W. Campbell, Andrew J. Gilbert, Pavlo Ivanusa, Sonja Jensen, Dustin M. Kasparek, Jonathan D. McCall, Benjamin S. McDonald
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Proceedings Volume 12531, Anomaly Detection and Imaging with X-Rays (ADIX) VIII; 125310E (2023) https://doi.org/10.1117/12.2664161
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States
Abstract
X-ray screening can be used to aid in the detection of a variety of threats, including items such as explosives and narcotics. Conventional x-ray imaging provides limited means of distinguishing between different materials. Gratings-based phase contrast x-ray imaging provides images reflecting three distinct materials signatures: absorption, similar to conventional x-ray imaging; phase contrast, proportional to electron density variations; and dark field, which can be related to material texture. These additional signatures may enhance the ability to distinguish materials in x-ray images, leading to detection improvements. Here we discuss considerations for system design and improved detection: approach to measurements at relevant energies for security screening, signature studies of explosives and opioids as well as common benign materials, and development of a prototype screening system.
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Erin A. Miller, Luke W. Campbell, Andrew J. Gilbert, Pavlo Ivanusa, Sonja Jensen, Dustin M. Kasparek, Jonathan D. McCall, and Benjamin S. McDonald "Gratings-based phase contrast x-rays for security screening", Proc. SPIE 12531, Anomaly Detection and Imaging with X-Rays (ADIX) VIII, 125310E (14 June 2023); https://doi.org/10.1117/12.2664161
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KEYWORDS
Phase contrast
X-rays
X-ray imaging
Absorption
Imaging systems
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