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Proceedings Paper

Direct-conversion x-ray imaging detector improvements and observations
Author(s): Denny L. Y. Lee; Chuande Lui; Kelly P. Golden
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Paper Abstract

DirectRay direct-conversion digital x-ray-imaging detectors using selenium exhibit high sensitivity and resolution to x-ray energies just below the K-fluorescence edge compared to energies just above. Detector sensitivity and self-protected dynamic range can be manipulated by modifying dielectric thickness and selenium electric field. Replacing the dielectric layer with a charge-transport layer (CTL) allows a faster cycle time, lower residual-image charge, improved signal to noise ratio, and better operating stability. The new CTL structure allows fast multi-frame imaging, enabling applications such as dual-energy subtraction, tomosynthesis, and dynamic imaging (fluoroscopy).

Paper Details

Date Published: 30 December 2003
PDF: 5 pages
Proc. SPIE 5199, Penetrating Radiation Systems and Applications V, (30 December 2003); doi: 10.1117/12.509388
Show Author Affiliations
Denny L. Y. Lee, Direct Radiography Corp. (United States)
Chuande Lui, Direct Radiography Corp. (United States)
Kelly P. Golden, Direct Radiography Corp. (United States)


Published in SPIE Proceedings Vol. 5199:
Penetrating Radiation Systems and Applications V
H. Bradford Barber; F. Patrick Doty; Hans Roehrig, Editor(s)

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