Title :
Digital X-Ray Imaging Using Avalanche a-Se Photoconductor
Author :
Sultana, Afrin ; Wronski, Matthew M. ; Karim, Karim S. ; Rowlands, J.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
This work presents the development of a novel detector comprised of an avalanche amorphous selenium (a-Se) photoconductor and an amorphous silicon (a-Si:H) passive pixel sensor for digital X-ray imaging, in particular, for low exposure imaging applications. Electrical compatibility of a high voltage (~1000 V) avalanche a-Se photoconductor with a low voltage (~25 V) a-Si:H pixel sensor is demonstrated. Single pixel readout is done as a proof of concept.
Keywords :
X-ray imaging; image sensors; photoconducting materials; amorphous silicon passive pixel sensor; avalanche a-Se photoconductor; avalanche amorphous selenium photoconductor; digital X-ray imaging; electrical compatibility; Amorphous materials; Amorphous silicon; Image sensors; Optical imaging; Photoconductivity; Pixel; Voltage; X-ray detection; X-ray detectors; X-ray imaging; Amorphous selenium; X-ray imaging; amorphous silicon; avalanche photoconductor; passive pixel sensor; thin-film transistor;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2009.2034386
