Flat panel detector for digital radiology using active matrix readout of amorphous selenium

Wei Zhao; Ira M. Blevis; Stephen Germann; John A. Rowlands; David F. Waechter; Zhong Huang

doi:10.1117/12.237814

11 April 1996 Flat panel detector for digital radiology using active matrix readout of amorphous selenium

Wei Zhao, Ira M. Blevis, Stephen Germann, John A. Rowlands, David F. Waechter, Zhong Huang

Proceedings Volume 2708, Medical Imaging 1996: Physics of Medical Imaging; (1996) https://doi.org/10.1117/12.237814
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

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.

Citation Download Citation

Wei Zhao, Ira M. Blevis, Stephen Germann, John A. Rowlands, David F. Waechter, and Zhong Huang "Flat panel detector for digital radiology using active matrix readout of amorphous selenium", Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); https://doi.org/10.1117/12.237814

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