摘要:
A detector assembly including a radiation conversion layer directly coupled to a pixel array is provided. The radiation conversion layer is adapted to receive radiation passing through an object. The pixel array is adapted for receiving one of a plurality of signals representative of the radiation passing through the object or the corresponding optical signals from an optional intermediate light production layer and further configured for generating a corresponding image of the object.
摘要:
A method of improving a signal to noise ratio of an image data set of a cargo container is disclosed. The method includes transmitting a radiation beam toward the cargo container, detecting the transmitted radiation beam via a plurality of area radiation detectors, each area radiation detector comprising an active area defined by a matrix of pixels, thereby defining enhanced radiation data, processing the enhanced radiation data and reconstructing the image data set representative of contents of the cargo container, combining image attributes of the image data set to improve the signal to noise ratio, thereby defining an enhanced image data set, and displaying on a display the enhanced image data set comprising an improved signal to noise ratio.
摘要:
A cargo container inspection radiation detector apparatus is disclosed. The apparatus includes a support, and a plurality of area radiation detectors disposed upon the support arranged corresponding to a height of the cargo container, each area radiation detector comprising an active area defined by a matrix of pixels.
摘要:
A cargo container inspection radiation detector apparatus is disclosed. The apparatus includes a support, and a plurality of area radiation detectors disposed upon the support arranged corresponding to a height of the cargo container, each area radiation detector comprising an active area defined by a matrix of pixels.
摘要:
A digital radiography imaging system having a digital x-ray detector that is easy to manufacture and produces high quality images with no artifacts. The digital x-ray detector including a front cover, a scintillator screen member, a light imager panel member having a surface in direct contact with an adjoining surface of the scintillator screen member, a compressible member positioned between the front cover and the scintillator screen member to apply pressure to the scintillator screen member and the adjoining surface between the scintillator screen member and the light imager panel member, electronic circuitry mounted on at least one printed circuit board and coupled to the light imager panel, a back cover, and a plurality of fasteners for fastening the front cover to the back cover.
摘要:
Imaging systems including a multiple focal spot x-ray source adapted to irradiate an object with a series of angularly displaced x-ray beams, one at a time, without substantial rotation or translation of the multiple focal spot x-ray source are provided. Such systems also includes a detector adapted to receive at least a fraction of the angularly displaced x-ray beams after being attenuated by the object to produce at least two x-ray projection images of the object. The imaging systems also include a processor adapted to shift and add the at least two x-ray projection images to bring at least two planes of the object into focus, one at a time.
摘要:
Intra-detector scatter correction methods to improve X-ray images. The method of correcting an X-ray image includes: receiving an original two-dimensional X-ray image; calculating a theoretical scattered image for a array of detector pixels by generating a theoretical point spread (TPS) function of a single pixel for a single line array of detector pixels, based on a system parameter; aggregating the TPS function into a full rotation of line arrays, so as to generating a TPS function for a 2-dimensional array of pixels; and applying the TPS function for a 2-dimensional array of pixels to a plurality of pixels in the detector; and then subtracting the theoretical scattered image from the original two-dimensional X-ray image, so as to create an improved X-ray image.
摘要:
A method, system and apparatus for processing a radiographic image of a scanned object is disclosed. A pixel offset correction is performed in integer format on the radiographic image using saturation arithmetic to produce an image in integer format with any negative corrected values clipped to a value of zero. The resulting pixels are converted to floating point format and the converted pixels are multiplied by a gain factor. Optionally the resulting pixels are recursively averaged with previous results. The resulting pixels are converted to integer format and the converted pixel values are clamped to a maximum value using saturation arithmetic. Non-functional pixel correction is performed in integer format and the resulting pixel values are clamped to a maximum value using saturation arithmetic. An optional processing path replaces the recursive average by a linear average. The resulting pixel values are optionally filtered to enhance features of interest. The resulting pixel value is mapped in integer format to a palette index to establish an output pixel intensity having one of many intensity levels. The optional processing is controlled through the hardware interface of a real-time image controller as images are acquired.
摘要:
An inspection system is provided. The inspection system includes at least one source configured to emit a beam of radiation onto an object. The inspection system also includes at least two area detectors having different characteristics configured to receive a reflected beam of radiation from the object and output a plurality of image data streams corresponding to the different characteristics, wherein the at least two area detectors disposed in at least one of a cascaded arrangement or separated by a pre-determined distance along a direction parallel or perpendicular to a scan direction of the object.
摘要:
An inspection system is provided. The inspection system includes at least one radiation source including single or multiple energies and configured to transmit a radiation beam through an object under inspection. The inspection system further includes an array of detectors configured to receive multiple radiation beams transmitted through the object, wherein the array of detectors are oriented at different angles with respect to the radiation beam and wherein at least one of the radiation source, and the array of detectors or the object is configured to be actuated in a translational direction relative to each other. The inspection system further includes processing circuitry coupled to the array of detectors and configured to generate a three dimensional image of the object.