Digital radiology using self-scanned readout of amorphous selenium: design considerations for mammography

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

doi:10.1117/12.208343

8 May 1995 Digital radiology using self-scanned readout of amorphous selenium: design considerations for mammography

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

Proceedings Volume 2432, Medical Imaging 1995: Physics of Medical Imaging; (1995) https://doi.org/10.1117/12.208343
Event: Medical Imaging 1995, 1995, San Diego, CA, United States

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.

Citation Download Citation

Wei Zhao, John A. Rowlands, Stephen Germann, David F. Waechter, and Zhong Huang "Digital radiology using self-scanned readout of amorphous selenium: design considerations for mammography", Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); https://doi.org/10.1117/12.208343

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