The present invention relates a security screening device, comprising: a radiation generator for respectively generating X-rays and neutron beams and irradiating same toward an inspection object; an inspection object transfer unit for changing the position of the inspection object; a radiation detector configured to respectively detect X-rays and neutron beams transmitted through the inspection object; and a gamma ray detector installed adjacent to the inspection object and configured to detect a gamma signal generated from the inspection object, wherein the radiation detector acquires image information of the inspection object by using radiation information detected from the X-rays and neutron beams that have passed through the inspection object, and the gamma ray detector analyzes the detected gamma ray to detect the location of the inspection object from the analysis of the inspection object and the image information.

The present invention consists of a system and a method for a rapid, complete and nonintrusive inspection of vessels without their physical control. The nonintrusive control method, in accordance with the invention, consists in the relative movement of a vessel, through two scanning frames, in a manner synchronized with the triggering of two penetrating radiation generators and the transmission of the signals generated by the detector matrix towards the subsystem for the acquisition, processing and display of data in order to form and display radiographic images from at least two different perspectives of the scanned vessel. The scanning system, according to the invention, consists of a support-type mechanical structure, a control center, two scanning frames, two penetrating radiation sources, a vessel towing subsystem, a subsystem for vessel stabilization and a subsystem for the acquisition, processing and display of data.

A coded mask apparatus is provided for gamma rays. The apparatus uses nested masks, at least one of which rotates relative to the other.

The present disclosure provides a spiral Computed Tomography (CT) device and a three-dimensional image reconstruction method. The spiral CT device includes: an inspection station operable to carry an object to be inspected and defining an inspection space; a rotational supporting apparatus disposed around the inspection space; a plurality of X-ray sources located on the rotational supporting apparatus; and a plurality of X-ray receiving apparatuses located on the rotational supporting apparatus and opposing to the plurality of X-ray sources respectively, wherein the plurality of X-ray sources and the plurality of X-ray receiving apparatuses are rotational synchronously with the rotational supporting apparatus, wherein the plurality of X-ray sources are closely disposed and fan-shaped X-ray beams provided by the plurality of X-ray sources cover the inspection space with a minimum degree of overlapping.

An imaging apparatus 10 for generating an image of a subject including a scanning arrangement which includes an energy emitting source 20 and a detector 22 housed within a housing 12. The housing defines a scanning zone 24 in which the subject is operatively positioned for scanning A displacing arrangement 36 which includes a U-shaped belt-and-pulley drive arrangement is configured to displace the scanning arrangement relative to the housing 12 in a scanning direction. The housing 12 has a first door and second door defining a substantially linear pathway through the scanning zone. A motor 38 and horizontal drive belts 40 are disposed below the scanning zone and are not displaced relative to the housing in the scanning direction in which the energy emitting source and detector are displaced during scanning such that the displacing arrangement does not restrict or impede movement of the subject through the scanning zone.

Disclosed are calibration assembly and calibration method of calibrating geometric parameters of a CT apparatus. The calibration assembly includes at least one calibration unit each including a plurality of calibration wires, and the plurality of calibration wires are arranged regularly in a same plane. The calibration assembly is easy to be processed and can be used to calibrate geometric parameters of a CT apparatus, and the calibration operations are simple and easy to be implemented.

An apparatus and method are provided for detecting indeterminate objects of interest contained within an encompassing medium using radiation event counts. Statistical analysis of measured events, such as local gamma radiation counts, is used to determine the probability of an object's presence in a field area. Event-detecting nodes are used to establish the baseline event activity such as background radiation (including environmental factors) in the field area, at a location determined unlikely to contain objects of interest due to geologic context or previous digging. Each node then independently detects and quantifies event activity, in an area to be evaluated, to derive evidence of the probability that an object of interest is within the medium. The calculated probabilities are then used to guide exploratory digging by indicating the likely direction and depth of an object of interest relative to the apparatus.

A method can include receiving measurements of a fluid mixture where the measurements are acquired by at least one downhole tool; performing a multiphysics inversion of the measurements to generate nuclear parameter values for the fluid mixture; performing a multivariate interpolation using the generated nuclear parameter values that accounts for intermolecular interactions in the fluid mixture; and determining a composition of the fluid mixture based on the multivariate interpolation.

A method can include receiving measurements of a fluid mixture where the measurements are acquired by at least one downhole tool; performing a multiphysics inversion of the measurements to generate nuclear parameter values for the fluid mixture; performing a multivariate interpolation using the generated nuclear parameter values that accounts for intermolecular interactions in the fluid mixture; and determining a composition of the fluid mixture based on the multivariate interpolation.

The present disclosure provides a portable terahertz security inspection apparatus, including: a carrying body; a terahertz emitting device arranged on the carrying body, wherein the terahertz emitting device includes a terahertz signal source and an emitting unit connected to the terahertz signal source and configured to emit a terahertz wave; a terahertz detector arranged on the carrying body and configured to receive the terahertz wave reflected from an inspected object; a data acquisition and processing system arranged on the carrying body and connected to the terahertz detector, wherein the data acquisition and processing system is configured to receive a scan data for the inspected object from the terahertz detector and generate a terahertz image; and a display device connected to the data acquisition and processing system and configured to receive and display the terahertz image from the data acquisition and processing system. The portable terahertz security inspection apparatus does not need to be equipped with a mechanical scanning system, so that a volume and a weight of the terahertz security inspection apparatus may be greatly reduced, and a security inspector may move the terahertz security inspection apparatus manually to perform scanning of the imaging area.