The techniques of dual-energy X-ray Radioscopy (DR) and Computed Tomography (CT) for baggage threat detection have been substantially improved during the years after the 9/11 attack and the series of terrorist attacks in Europe. Almost all airports worldwide are nowadays routinely using dual-energy baggage screeners (DR) as first-level threat detection equipment. The largest ones have also already installed dual-energy CT or Multi-view systems in

A dedicated on-board dual energy computer tomograph able to generate both tomographic and digital radiographic images of unconsolidated sediments cores with a diameter up to 12 cm and a height up to 1 m was built and tested on-board of the R/V Mare Nigrum. This instrument, designed to be used on-board of any oceanographic research vessel with minimum adaptations, can work very well on stationary laboratory too, provided that there is adequate protection

An X-ray multi-purpose dual-energy computer tomograph has been used to investigate a variety of objects of geological interest such as unconsolidated sediments (sand, silt, clay, mud) and/or metamorphic rock samples. By using an appropriate set of standard materials as well as a proper version of filtered back projection reconstruction algorithms, we have obtained for each studied sample two images, depicting with an error of 2 to 3% densities as

By means of a home made X-ray dual-energy computer tomography (CT) provided with a double set of X-ray detector arrays separated by a copper foil and by using a proper variant of filtered back projections reconstruction algorithm together with a set of well calibrated standard samples we have been able to determine with a precision varying between 3.5 % and 2 % the density as well as the effective atomic number distribution in any section of a great

We report the first preliminary simulated experiments of an algebraic iterative tomographic reconstruction algorithm having excellent materials identification accuracy, based on linear stepping scans of 3D objects. The new algorithm, mainly intended for luggage control CT implementation, could substantially reduce the equipment cost, size and the scanning time, offering also good materials identification accuracy.

The experiments using our laboratory dual-energy X-Ray Radioscopy/Tomography equipment reveals an accuracy better than 2% in measuring Zeffective and around 5% in the weight measurement. In “dualenergy” X-ray tomography (CT) accuracy better than 3% in measuring Zeffective and Density of scanned objects and less than 2% accuracy in materials identification (using also the attenuation coefficients comparison) has been obtained. Due too the high

An X-ray dual-energy computer tomograph provided with a double set of X-ray detectors arrays separated by a copper foil was projected, assembled and commissioned to be used on-board of the R/V Mare Nigrum. By using a variant of filtered back projections reconstruction algorithm together with a set of calibrated standard samples, it was possible do determine on-board and with a precision of 3.5 % the density and 2.5 % the effective atomic number distribution