28 June 2001 Se-based flat-panel detector for screening mammography
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Proceedings Volume 4320, Medical Imaging 2001: Physics of Medical Imaging; (2001); doi: 10.1117/12.430884
Event: Medical Imaging 2001, 2001, San Diego, CA, United States
Abstract
A selenium-based flat-panel direct converter detector suitable for digital mammography was developed. The detector is based on a TFT-array with a resolution of 2816 X 2048 pixels, and a pixel pitch of 85 micrometers . Although the geometric fill factor for each pixel is around 70% , the effective fill factor for the detector is closer to 88% due to internal electric field shaping within the selenium layer. A selenium multilayer p-i-n structure of 200 micrometers was deposited onto the array by selectively doping the regions near each contact to produce unipolar conducting blocking layers. This structure absorbs more than 95% of a typical mammography beam.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Brad T. Polischuk, Serge Savard, Vincent Loustaneau, Marc Hansroul, Sebastien Cadieux, Anne Vaque, "Se-based flat-panel detector for screening mammography", Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); doi: 10.1117/12.430884; https://doi.org/10.1117/12.430884
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KEYWORDS
Sensors

Modulation transfer functions

Selenium

Mammography

X-rays

Photons

Signal to noise ratio

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