Title :
Three-TFT image sensor for real-time digital X-ray imaging
Author :
Safavian, N. ; Chaji, G.R. ; Nathan, A. ; Rowlands, J.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Ont., Canada
Abstract :
A new current-programmed, current-output active TFT image sensor suitable for real-time X-ray imaging (e.g. fluoroscopy) using hydrogenated amorphous silicon (a-Si:H) thin-film-transistor (TFT) technology is introduced. The proposed pixel circuit can successfully compensate for characteristic variations such as mobility and threshold voltage shift in a-Si:H TFTs. Simulation and measurement results show that high on-pixel amplification can be accomplished with this pixel circuit.
Keywords :
X-ray imaging; amorphous semiconductors; biomedical imaging; diagnostic radiography; elemental semiconductors; image sensors; real-time systems; silicon; thin film transistors; Si:H; TFT image sensor; hydrogenated amorphous silicon; pixel circuit; real-time digital X-ray imaging; thin film transistor technology;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20063604
