2 March 2006 Low cost digital radiographic imaging systems: the x-ray light valve
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In recent years, new x-ray radiographic systems based on large area flat panel technology have revolutionized our capability to produce digital x-ray radiographic images. However, these active matrix flat panel imagers (AMFPI) are extraordinarily expensive compared to the systems they are replacing. Thus there is a clear need for a low cost digital imaging system for general applications in radiology. Different approaches have been considered to make lower cost xray imaging devices for digital radiography, including: reducing the cost of existing flat panel systems, scanned projection x-ray, an approach based on computed radiography (CR) technology, and optically demagnified x-ray screen/camera systems. All of these approaches are quite expensive and none have the image quality of AMFPIs. We have identified a new approach - the X-ray Light Valve (XLV). It combines three well-established technologies: an a- Se layer to convert x-rays to image charge, a liquid crystal (LC) cell, and a scanned digital readout. This device achieves our goal of immediate readout with image quality comparable to an AMFPI, while keeping costs low. The XLV system has been shown to have all the properties required for general radiography.
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J. A. Rowlands, J. A. Rowlands, Christie Ann Webster, Christie Ann Webster, Ivaylo Koprinarov, Ivaylo Koprinarov, Peter Oakham, Peter Oakham, Kelly C. Schad, Kelly C. Schad, Timothy Szeto, Timothy Szeto, Stephen Germann, Stephen Germann, "Low cost digital radiographic imaging systems: the x-ray light valve", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 614203 (2 March 2006); doi: 10.1117/12.650195; https://doi.org/10.1117/12.650195


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