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Proceedings Paper

Characterization of a digital x-ray detector for region of interest tuberculosis screening
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Paper Abstract

Cost and accessibility are major barriers to x-ray medical diagnostic screening in low- to mid-income countries. The cost of traditional medical-grade x-ray imaging systems is prohibitively large except to major hospitals in urban centers, preventing the early diagnosis of many curable diseases. Sputum, blood and urine tests are slower, and difficult to administer in remote locations, having high associated transportation and storage costs. A low-cost, tuberculosis-specific, teleradiology-enabled, digital x-ray imaging system is proposed that will make diagnosis fast, accessible and inexpensive. A system of this type would ideally cost below $10,000 and is achievable today using a combination of commodity and industrial products, region-of-interest imaging, and an optimization of resolution and sensitivity requirements for the task of screening pulmonary tuberculosis. In this research, we report preliminary investigations we have carried out on the x-ray detector, a PerkinElmer (XRD 0820) industrial-grade, 8”x8” flat-panel, amorphous silicon array with 200 micron pixels. Detective quantum efficiency (DQE), modulation transfer function (MTF) and noise power spectrum (NPS) measurements are taken at a typical chest radiography exposure that allow a direct comparison with high-end chest x-ray detectors and existing CR systems.

Paper Details

Date Published: 6 March 2013
PDF: 9 pages
Proc. SPIE 8668, Medical Imaging 2013: Physics of Medical Imaging, 86685H (6 March 2013); doi: 10.1117/12.2005949
Show Author Affiliations
Ryan Mann, Univ. of Waterloo (Canada)
Ian A. Cunningham, Robarts Research Institute (Canada)
Karim S. Karim, Univ. of Waterloo (Canada)

Published in SPIE Proceedings Vol. 8668:
Medical Imaging 2013: Physics of Medical Imaging
Robert M. Nishikawa; Bruce R. Whiting; Christoph Hoeschen, Editor(s)

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