Detection of explosive materials in dual-energy X-Ray security systems

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Yalcin O., Reyhancan İ. A.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, vol.1040, 2022 (SCI-Expanded)

• Publication Type: Article / Article
• Volume: 1040
• Publication Date: 2022
• Doi Number: 10.1016/j.nima.2022.167265
• Journal Name: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Analytical Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, Chemical Abstracts Core, INSPEC, Public Affairs Index, DIALNET
• Keywords: X-ray imaging, Effective atomic number, Dual-energy X-ray, Threat detection, Explosive detection, EFFECTIVE ATOMIC-NUMBER, PARAMETERIZATION, DENSITY
• Istanbul Technical University Affiliated: Yes

Abstract

Due to the increasing security needs, X-ray devices have started to be used more and more in security systems. Dual-energy X-ray devices are preferred to conventional ones since they enable Effective Atomic Number (Z(eff)) estimation that cannot be provided by traditional devices, which use density-based segmentation. In this paper, pure material samples are used to obtain system characteristics. Linear mass attenuation coefficients (mu) of the materials can be calculated by using two leveled images, and these coefficients provide information about the Z(eff) of substances. After that, they can be classified as organic and inorganic via the effective atomic number method and explicitly identified. As well as this, organic explosives can be detected thanks to this simple and effective approach.