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Proceedings Paper

Digital radiology using self-scanned readout of amorphous selenium: design considerations for mammography
Author(s): Wei Zhao; John A. Rowlands; Stephen Germann; David F. Waechter; Zhong Huang
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Paper Abstract

We are developing a large area, flat panel solid-state detector for general application to digital radiology. The proposed detector employs a continuous photoconductive layer of amorphous selenium ((alpha) -Se) to convert incident x rays to electron-hole pairs, which are then separated and drawn to the surface of the (alpha) -Se by an applied electric field. The resulting charge image is digitally read out in situ using a large area active matrix array made with cadmium selenide (CdSe) thin film transistors (TFTs). The relationship between the potential imaging properties and the design parameters of this detector concept for digital mammography were analyzed theoretically using measured characteristics of (alpha) -Se layers and CdSe active matrices.

Paper Details

Date Published: 8 May 1995
PDF: 10 pages
Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); doi: 10.1117/12.208343
Show Author Affiliations
Wei Zhao, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
John A. Rowlands, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
Stephen Germann, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
David F. Waechter, Litton Systems Canada Ltd. (Canada)
Zhong Huang, Litton Systems Canada Ltd. (Canada)

Published in SPIE Proceedings Vol. 2432:
Medical Imaging 1995: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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