8 May 1995 Cost-effective, high-resolution, portable digital x-ray imager
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A high-resolution, portable, digital x-ray imaging device which replaces current film based systems has been developed. The system is intended to be used in field hospitals where on-line verification is required during treatment. Image acquisition is performed by a 3 X 4 matrix of charge-coupled-device (CCD) imaging sensors which view the output of a standard x-ray scintillation screen via an off-the-shelf optical system. The use of multiple, moderately priced CCD units results in a high resolution system with a low cost of production relative to other digital imaging systems of comparable resolution. The fields of view of each CCD are purposefully overlapped so as to facilitate image reconstruction. The acquisition of each radiographic image formed on a scintillation screen results in the production of twelve sub- images. A software algorithm is employed to detect the regions of overlap and create a single, continuous digital radiograph from the raw CCD data. Software methods are utilized to correct for barrel distortion affects that are caused by the use of low cost lens components.
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Evren M. Kutlubay, Richard M. Wasserman, Darold C. Wobschall, Raj S. Acharya, Stephen Rudin, Daniel R. Bednarek, "Cost-effective, high-resolution, portable digital x-ray imager", Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); doi: 10.1117/12.208377; https://doi.org/10.1117/12.208377

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