The x-ray light valve: a potentially low-cost, digital radiographic imaging system-concept and implementation considerations

Medical Physics
Christie Ann WebsterJ A Rowlands

Abstract

New x-ray radiographic systems based on large-area flat-panel technology have revolutionized our capability to produce digital x-ray images. However, these imagers are extraordinarily expensive compared to the systems they are replacing. Hence, there is a need for a low-cost digital imaging system for general applications in radiology. A novel potentially low-cost radiographic imaging system based on established technologies is proposed-the X-Ray Light Valve (XLV). This is a potentially high-quality digital x-ray detector made of a photoconducting layer and a liquid-crystal cell, physically coupled in a sandwich structure. Upon exposure to x rays, charge is collected on the surface of the photoconductor. This causes a change in the optical properties of the liquid-crystal cell and a visible image is generated. Subsequently, it is digitized by a scanned optical imager. The image formation is based on controlled modulation of light from an external source. The operation and practical implementation of the XLV system are described. The potential performance of the complete system and issues related to sensitivity, spatial resolution, noise, and speed are discussed. The feasibility of clinical use of an XLV device based on amorphou...Continue Reading

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Citations

Oct 10, 2008·Medical Physics·Robert D MacDougallJ A Rowlands
Jan 30, 2009·Medical Physics·P OakhamJ A Rowlands
Apr 9, 2014·Journal of Applied Clinical Medical Physics·P ZygmanskiJ Hesser
Jun 6, 2009·The New England Journal of Medicine·Helen J LachmannUNKNOWN Canakinumab in CAPS Study Group
Jan 24, 2015·Annals of Medicine·Sabeeda Kadavath, Petros Efthimiou

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