Abstract: The present specification describes automated methods and systems for: checking and validating the quality of scan data that is presented to an operator of a security screening system and inspection algorithms that are configured to search for illicit cargo. The data quality is checked and validated independently of hardware vendor(s), scanner model, or scanning technology. Additionally, the methods of the present specification are configured to troubleshoot problems that may be detected during the quality check and validation processes, automatically generate periodic reports for management, generate alerts for technical personnel, and pass quality information to algorithms configured to search for contraband. Embodiments of the method implement a set of algorithms that are customized for each scanner type and location based on the collected scan data. Additionally, embodiments also provide methods to monitor quality of inspection algorithm results.

Abstract: Systems and methods for identifying objects in shipping containers using radiographic images are described. More particularly, techniques for using artificial neural networks to analyze radiographic images of shipping containers and associated cargo manifests are discussed.

Abstract: Systems and methods presented herein provide corrections for fluctuations in dose or energy of radiation sources including x-ray radiation sources. The corrections can be applied to improve the quality of transmission radiography data or other radiation imagery or to facilitate feedback control of a radiation source to improve stability.

Abstract: Systems and methods presented herein provide corrections for fluctuations in dose or energy of radiation sources including x-ray radiation sources. The corrections can be applied to improve the quality of transmission radiography data or other radiation imagery or to facilitate feedback control of a radiation source to improve stability.

Abstract: A neutron detector includes a pressure vessel, an electrically conductive field cage assembly within the pressure vessel and an imaging subsystem. A pressurized gas mixture of CF4, 3He and 4He at respective partial pressures is used. The field cage establishes a relatively large drift region of low field strength, in which ionization electrons generated by neutron-He interactions are directed toward a substantially smaller amplification region of substantially higher field strength in which the ionization electrons undergo avalanche multiplication resulting in scintillation of the CF4 along scintillation tracks. The imaging system generates two-dimensional images of the scintillation patterns and employs track-finding to identify tracks and deduce the rate and direction of incident neutrons. One or more photo-multiplier tubes record the time-profile of the scintillation tracks permitting the determination of the third coordinate.

Abstract: A neutron detector includes a pressure vessel, an electrically conductive field cage assembly within the pressure vessel and an imaging subsystem. A pressurized gas mixture of CF4, 3He and 4He at respective partial pressures is used. The field cage establishes a relatively large drift region of low field strength, in which ionization electrons generated by neutron-He interactions are directed toward a substantially smaller amplification region of substantially higher field strength in which the ionization electrons undergo avalanche multiplication resulting in scintillation of the CF4 along scintillation tracks. The imaging system generates two-dimensional images of the scintillation patterns and employs track-finding to identify tracks and deduce the rate and direction of incident neutrons. One or more photo-multiplier tubes record the time-profile of the scintillation tracks permitting the determination of the third coordinate.