High dose efficiency, ultra-high resolution amorphous selenium/CMOS hybrid digital X-ray imager

We demonstrate measured X-ray dose efficiency results from a 5.6-μm × 6.25-μm pixel-pitch direct-conversion amorphous selenium/CMOS hybrid X-ray imager. Compared to existing scintillator-based imagers, our approach enables up to 100× gains in DQE at spatial frequencies of 20-60 cycles/mm, which coul...

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Bibliographic Details
Main Authors: Scott, C. C., Parsafar, A., El-Falou, A., Levine, P. M., Karim, K. S.
Format: Conference Proceeding
Language:English
Subjects:
CMOS
CMOS integrated circuits
CMOS technology
Devices
Digital
Errors
Gain
Imaging
In vivo
Meetings
Selenium
Spatial resolution
X-ray imaging
X-rays
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Description
Summary:We demonstrate measured X-ray dose efficiency results from a 5.6-μm × 6.25-μm pixel-pitch direct-conversion amorphous selenium/CMOS hybrid X-ray imager. Compared to existing scintillator-based imagers, our approach enables up to 100× gains in DQE at spatial frequencies of 20-60 cycles/mm, which could radically accelerate bioengineering research. The measured MTF is 50% at 32 cycles/mm, corresponding to a 16-μm effective object size. We also demonstrate a MTF model which confirms experimental results with an RMS error of 0.02.
ISSN:2156-017X
DOI:10.1109/IEDM.2015.7409803