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Proceedings Paper

Low cost digital radiographic imaging systems: the x-ray light valve
Author(s): J. A. Rowlands; Christie Ann Webster; Ivaylo Koprinarov; Peter Oakham; Kelly C. Schad; Timothy Szeto; Stephen Germann
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Paper Abstract

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.

Paper Details

Date Published: 2 March 2006
PDF: 9 pages
Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 614203 (2 March 2006); doi: 10.1117/12.650195
Show Author Affiliations
J. A. Rowlands, Sunnybrook and Women's College Health Sciences Ctr. (Canada)
Christie Ann Webster, Sunnybrook and Women's College Health Sciences Ctr. (Canada)
Ivaylo Koprinarov, Sunnybrook and Women's College Health Sciences Ctr. (Canada)
Peter Oakham, Sunnybrook and Women's College Health Sciences Ctr. (Canada)
Kelly C. Schad, Sunnybrook and Women's College Health Sciences Ctr. (Canada)
Timothy Szeto, Sunnybrook and Women's College Health Sciences Ctr. (Canada)
Stephen Germann, Sunnybrook and Women's College Health Sciences Ctr. (Canada)


Published in SPIE Proceedings Vol. 6142:
Medical Imaging 2006: Physics of Medical Imaging
Michael J. Flynn; Jiang Hsieh, Editor(s)

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