Performance of a high-throughput full-tunnel XRD checked baggage scanning system

Coccarelli, David; Dudley, Colt; Pike, Daniel; Greenberg, Ronald I.; Moody, Ryan M.; Franco, E; Richmond, Turner; Kapadia, Anuj J.; Gehm, Michael E.; Greenberg, Joel A.

doi:10.1117/12.2664253

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Work on breast cancer detection 11,12 aims to assess suspicious tissue without needle biopsy. Security is a major application [13][14][15][16][17][18][19][20] and full-scale systems have been configured. 16,20 Collimation design is critical to practicality.…”

Section: Literature Overviewmentioning

confidence: 99%

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Spectrum optimization for x-ray dual-mode imager comprising radiography and coherent scatter

Kemdirim,

Johns

2024

Anomaly Detection and Imaging With X-Rays (ADIX) IX

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Medical, industrial and security x-ray systems should give images that demonstrate material contrast for accurate identification. Acquiring images simultaneously from coherently scattered x rays plus primary is an efficient way to do so. In our projection imaging system for small biological samples, the same detector is used for both primary and scatter, necessitating attenuation of the post-object primary in order that both primary and scatter lie within the detector's dynamic range. Consideration of the cross sections shows that the peak scatter-to-primary fluence ratio is nearly independent of photon energy. At lower energies, coherent scatter produces larger diffraction rings, which give better spatial separation of primary and scatter, but there is more attenuation and multibeam information disentanglement is more difficult. Previous development work for our system used a 110 kV incident beam, with a 1.5-mm-thick post-object attenuator disk of 90% W/10% Cu alloy for each of the 15 pencil beams. In this work we investigate alternatives which are less attenuating. By reducing the kV and using K-edge filters the beam average energy is lowered to achieve greater primary image contrast. Preliminary primary beam results are shown.

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Section: Literature Overviewmentioning

confidence: 99%

“…Security is a major application [13][14][15][16][17][18][19][20] and full-scale systems have been configured. 16,20 Collimation design is critical to practicality. Point-by-point translation of a single pencil beam plus detector in step-andshoot mode or continuous motion works but acquisition times are long.…”

Section: Literature Overviewmentioning

confidence: 99%

Spectrum optimization for x-ray dual-mode imager comprising radiography and coherent scatter

Kemdirim,

Johns

2024

Anomaly Detection and Imaging With X-Rays (ADIX) IX

View full text Add to dashboard Cite

show abstract

Improved reconstruction and classification performance in a hybrid CT+XRD explosives detection system

Richmond,

Pike,

Franco

et al. 2024

Anomaly Detection and Imaging With X-Rays (ADIX) IX

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Identifying and intercepting prohibited items and explosives is a critical focus of aviation security. While computed tomography (CT) systems represent the industry standard for detecting explosives in baggage, X-ray diffraction imaging (XRDI) systems have shown increasing performance and commercial viability. Our approach to explosives detection involves the combination of CT and XRDI into a single, hybrid system where both the CT and XRDI data are utilized in the reconstruction and classification algorithms. In this work, we focus on comparing multiple reconstruction and classifier implementations and quantifying the resulting performance. Our analysis shows higher quality reconstructions lead to improved material separability, better classification performance (detection and false alarm rates), and reduces model uncertainty. Through this work, we demonstrate the relationship between improved quality of reconstructions and the separability of threat from non-threat objects in the domain of explosives detection.

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Performance of a high-throughput full-tunnel XRD checked baggage scanning system

Cited by 2 publications

References 9 publications

Spectrum optimization for x-ray dual-mode imager comprising radiography and coherent scatter

Spectrum optimization for x-ray dual-mode imager comprising radiography and coherent scatter

Improved reconstruction and classification performance in a hybrid CT+XRD explosives detection system

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