Abstract
Modern flat-panel x-ray imaging detectors have played an important role in the transition from analog to digital x-ray imaging. They capture an x-ray image electronically and hence enable a clinical transition to digital radiography. This chapter critically discusses the material, transport and imaging detector properties (e. g., dark current) of several potential x-ray photoconductors and compares them with an ideal photoconductor for use in direct-conversion imaging detectors. The present chapter also considers various metrics of detector performances including sensitivity, detective quantum efficiency, resolution in terms of the modulation transfer function, image lag and ghosting; and examines how these metrics depend on the photoconductor material, and detector structure and design.
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Acknowledgements
The authors would like to thank Dr. John Rowlands for many fruitful discussions and suggestions during the first edition of this article. The authors acknowledge financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) through its discovery grants program.
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Kabir, M.Z., Kasap, S. (2017). Photoconductors for X-Ray Image Detectors. In: Kasap, S., Capper, P. (eds) Springer Handbook of Electronic and Photonic Materials. Springer Handbooks. Springer, Cham. https://doi.org/10.1007/978-3-319-48933-9_45
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