Abstract: A method of detecting defects in protective clothing items includes positioning a protective clothing item in a scanner; moving the item through scanner while irradiating the item with X-rays; measuring energy of the X-rays that pass through the item using a linear detector as the item is being moved through the scanner; calculating a lead equivalent thickness of each pixel of the item based on the energy; identifying any areas of the item with defects; and displaying an image of the item with the identified areas highlighted. Optionally, a conveyor belt and clamping wheels are used to move the item. Different colors are used to indicate different lead equivalent thickness on the image. Optionally, the method includes dividing the image into separate windows of 10x10 pixels, corresponding to areas of up to 15x15 mm, and calculating arithmetic mean of the lead equivalent thickness for the item and for each area.

Abstract: Detecting hidden objects on a human body includes acquiring an incoming X-ray image of the human body passing through a penetrating X-ray scanner; generating additional images based on the incoming image by performing logarithmic or saliency transformations or contrasting of the incoming image; obtaining maps for all objects and known object classes, the maps show which pixels correspond to objects or to background, by passing the incoming and the additional images through a neural network with a deep Segnet-U-Net architecture optimized for overlapping object detection with long skip connections before each downsampling layer of the neural network; using the maps, identifying unknown objects in the incoming image by recognizing all objects/objects of known classes, excluding previously classified objects from the known classes from segmented non-anatomic areas; segmenting the incoming image of the human body into multiple parts; and identifying parts containing objects belonging to both the known and unknown

Abstract: Multi-modal scanner with metal detector for defining an X-ray scan region of a human body with a metal object includes an X-ray source; adjustable collimator outputting a fan-shaped X-ray beam from the X-ray source; an X-ray detector detecting the X-ray beam after passing through a human body; a metal detector adapted to identify an area with the metallic object; and a processor controlling the X-ray source, the adjustable collimator and the metal detector, and changing an aperture of the collimator to limit the fan-shaped X-ray beam to the identified area of the human body. Visual indicators (LEDs) are on a frame of the scanner for indicating the area of the human body with the metallic object. The collimator includes two lead plates that are moved vertically automatically upon detection of the metallic object to direct the fan-shaped X-ray beam to only the area of the human body with the metal.

Abstract: A containerized system for vehicle scanning, includes a container; the container having a vertically movable top portion of the container, the top portion including an X-ray source and a collimator; the container having a bottom portion, the bottom portion including a first linear X-ray detector; an entry ramp that rotates to a vertical position in a transportable state and functions as a first wall of the container, the entry ramp being foldable so as not to exceed a height of the container in the transportable state; an exit ramp that rotates to a vertical position in the transportable state and functions as a second wall of the container, the entry ramp being foldable so as not to exceed a height of the container in the transportable state; a generator for autonomous operation; and an operator station for display of scan data.

Abstract: A multi-channel system for truck scanning, includes an impulse radiation source; and a plurality of detection circuits, each detection circuit comprising a scintillator, a photodiode, a supplemental circuit, an integrator and an ADC, connected in series. A current of the photodiode is proportional to radiation from the impulse radiation source. A data storage device stores outputs of the ADCs and provides the outputs to a computer that converts them to a shadow image of the scanned truck. The supplemental circuit isolates a capacitance of the photodiode from the integrator, filters out low frequency signals from the photodiode, amplifies the signal from the photodiode and reduces a bandwidth of the photodiode seen by the integrator. The supplemental circuit reduces an influence of capacitance of the photodiode on system noise, increases a signal-to-noise ratio of the system, and reduces an influence of photodiode temperature changes on a quality of the scanned image.

Abstract: A method for an automated detection of swallowed capsules on X-ray scanner images, the method including (a) based on a first image of a person, generating additional images by performing transformations of the first image; (b) calculating a position of a stomach area in the first image and on the additional images; (c) identifying rotationally invariant periodic features in windows of the stomach area; (d) calculating aggregate features for the windows based on the rotationally invariant periodic features; and (e) informing a user that the first image contains the swallowed capsules if a dissimilarity function for the aggregate features for the first image, relative to images that do not contain swallowed capsules, is larger than a predefined threshold. Optionally, the method includes segmenting the stomach area prior to identifying rotationally invariant periodic features.

Abstract: A portable X-ray system includes an X-ray scanner coupled to a module for processing and visualization of digital signals; and foldable intake and output trays configured to pass an object in and out of the scanner module. The foldable intake and output trays are articulated approximately in their middle. A first drum extends substantially across an entire opening of the scanner tunnel and configured to press down on the object and pull the object inside a scanner tunnel. A second drum extends substantially across an entire opening of the scanner tunnel and configured to press down on the object and pull the object from the scanner tunnel. A radiation shield covers an opening of the scanner tunnel. Sensors detects a type of object to be scanned and to control the first drum according to the type of object to be pulled inside the scanner tunnel.

Abstract: A module for processing and visualization of digital signals and an X-ray scanner module are implemented on a mobile platform movable on wheels. The digital X-ray module includes a source of fan-shaped X-ray radiation beam with a detector of X-ray radiation passing through a mattress being examined. The mobile X-ray mattress scanner is equipped with an input and an output tray having rollers for supporting the mattress as it is pulled in and out of the special mattress-shaped tunnel opening by a drum motor. Detection results are processed and analyzed. The drum motor is integrated into the X-ray mattress scanner at the input opening so it can press and pull the matters inside the scanner automatically. The intake and output trays can be folded for moving the scanner along narrow corridors or on the stairs.

Abstract: An X-ray examination station includes a first source of X-ray radiation for whole body scanning of a human body using a first fan beam of X-ray radiation; a first vertical linear radiation detector configured to detect the first fan beam; a second source of X-ray radiation installed at mid-height of a person being examined, for scanning a central portion of the human body using a second fan beam of X-ray radiation; a second vertical detector of X-ray radiation configured to detect the second fan beam; and a control unit configured to turn on each of the X-ray radiation sources. The first and the second radiation fan beams are emitted in parallel planes. The first X-ray radiation source is turned on for the whole body scanning. The second X-ray radiation source is turned on for scanning the central portion of the body.