A system for quantifying x-ray backscatter system performance may include a support; a plurality of rods mounted on the support; the rods of the plurality of rods arranged parallel to each other, having generally curved outer surfaces, and being arranged in groups of varying widths, each group of the groups having at least two of the rods of a same width; and a user interface configured to be connected to receive a backscatter signal from an x-ray backscatter detector associated with an x-ray tube, apply a transfer function to generate a transfer curve representing x-ray backscatter for each rod of the plurality of rods from x-rays transmitted by the x-ray tube.

A calculation method for a dual-energy X-ray imaging system is provided. The calculation method for the dual-energy X-ray imaging system includes the following steps. A plurality of material attenuation coefficient ratio of the dual-energy projection image are established according to the reference materials with known material characteristics. The effective atomic number of each reference material and the material attenuation coefficient ratio are used to establish a calibration data set. A rational polynomial approximation method is adopted to obtain the characteristic model related to the material attenuation coefficient ratio of the reference material and the effective atomic number of the reference material. The material attenuation coefficient ratio of the dual-energy projection image of unknown material is established. The material attenuation coefficient ratio of the unknown material is substitute into the characteristic model to obtain the effective atomic number corresponding to the unknown material.

A system for detecting clandestine materials employs a lightweight neutron-source that can be mounted to a remotely controlled mobile platform for flexible and high standoff scanning of possibly explosive materials. In one embodiment, aerial drones hold the neutron-source and detectors for highly flexible remote scanning.

A method for correctly identifying at least one source, in particular at least one nuclide, enclosed in a human body and/or a container, is provided, the method comprising the following steps: detecting and measuring the at least one source by means of a gamma spectroscopic device; identifying, in a first estimation step, the at least one source by means of a standard nuclide identification procedure for evaluating a measured first spectrum of the at least one source; applying a second estimation step on the basis of the result of the first estimation step, wherein the result of the first estimation step is used for acquiring a plurality of second spectra of the at least one source found by the standard nuclide identification procedure for a plurality of absorption scenarios and for a plurality of scattering scenarios; and comparing the measured first spectrum with a scatter and absorber spectrum obtained from the plurality of second spectra generated in the second estimation step.

Among other things, an energy shield (212) for a radiation system, such as a security imaging system, is provided. The energy shield is comprised of one or more flaps (300). At least one flap defines an aperture (320) providing a demarcation between a first flap segment (322) of the flap and a second flap segment (324) of the flap. The aperture (e.g., and a flexible member (326) positioned spatially proximate the aperture) provide for (e.g., facilitate) movement of the second flap segment relative to the first flap segment. In this manner, an amount of force required to be applied by an object to pass by the flap may be reduced when the object is small and merely contacts the second flap segment, for example. In this manner, baggage jams may be mitigated, for example, by reducing the likelihood that certain objects will be impeded from passing through the energy shield.

A method of operating a radiographic inspection system is designed for a radiographic inspection system in which a conveyor chain with identical modular chain segments transports the articles being inspected. The method encompasses a calibration mode and an inspection mode of the radiographic inspection system. In the calibration mode, calibration data characterizing the radiographic inspection system with the empty conveyor chain are generated and stored as a template image. In the inspection mode, raw images (50) of the articles (3) under inspection with the background (41) of the conveyor chain are acquired and arithmetically merged with the template image. The method results in a clear output image (51) of the articles under inspection being obtained without the interfering background of the conveyor chain.

For the purpose of providing a transportable linear accelerator system which can restrain entering of losing ion beams deviated from a trajectory therefor, to thereby efficiently achieve reduction in radioactivity at low cost, and a transportable neutron source equipped therewith, a transportable linear accelerator system is configured to be provided with a beam chopper just before an inlet of a post-accelerator, thereby to cut off, from the proton beams pre-accelerated by a pre-accelerator, uncontrolled proton beams, and thus to radiate only the controlled proton beams to the post-accelerator, so that the proton beams are prevented from hitting an acceleration electrode, etc. of the post accelerator.

In one embodiment, there is provided detector for an inspection system, including at least one first scintillator configured to, in response to interaction with a pulse of inspection radiation, re-emit first light in a first wavelength domain, at least one second scintillator configured to, in response to interaction with the pulse of inspection radiation, re-emit second light in a second wavelength domain different from the first wavelength domain, and at least one first sensor configured to measure the first light and the second light.

The method and device to ensure a safety of people's life and health is based on measurements of spontaneous electromagnetic radiation caused by a deformation from a structure or device, a nucleation and growth of plant cells and living organisms; calculating an energy stored in a portion of the structure or cells based on a measured intensity; performing a comparison of the energy stored with a critical value for the structure and pathological changes in the cells; and indicate a potential failure of the structure or a level of pathological changes based on the performed comparison.

The invention provides a test device for assessing the detection capability of an X-ray system with a medium and/or large tunnel size. The device comprises a support and at least one test module mounted on the support. The device may optionally also comprise a stand which holds the support at a predetermined angle to the horizontal. The test module, or at least one of the test modules, is capable of being used in a test for an aspect of the detection capability.