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Proceedings Paper

Flat panel detector for digital radiology using active matrix readout of amorphous selenium
Author(s): Wei Zhao; Ira M. Blevis; Stephen Germann; John A. Rowlands; David F. Waechter; Zhong Huang
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Paper Abstract

Our goal is to develop a large area, flat panel, solid-state detector for both digital radiography and fluoroscopy. The proposed detector employs a photoconductive layer of amorphous selenium (a-Se) to convert x rays into charge. The charge image formed on the a-Se is electronically read out in situ using a two dimensional array of thin film transistors (TFTs), or 'active matrix.' Since the active matrix readout is capable of producing x-ray images in real- time, it can potentially be applied in both radiography and fluoroscopy. Investigation of the practical feasibility of this concept with a prototype x-ray imaging detector is described. Measurement of x-ray imaging properties, e.g. modulation transfer function (MTF) and x-ray sensitivity of the prototype are investigated, and the results compared with our earlier theoretical analysis.

Paper Details

Date Published: 11 April 1996
PDF: 9 pages
Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); doi: 10.1117/12.237814
Show Author Affiliations
Wei Zhao, Sunnybrook Health Sciences Ctr./Univ. of Toronto (Canada)
Ira M. Blevis, Sunnybrook Health Sciences Ctr./Univ. of Toronto (Canada)
Stephen Germann, Sunnybrook Health Sciences Ctr./Univ. of Toronto (Canada)
John A. Rowlands, Sunnybrook Health Sciences Ctr./Univ. of Toronto (Canada)
David F. Waechter, Litton Systems Canada Ltd. (Canada)
Zhong Huang, Litton Systems (Canada)


Published in SPIE Proceedings Vol. 2708:
Medical Imaging 1996: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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