Three-TFT image sensor for real-time digital X-ray imaging

Three-TFT image sensor for real-time digital X-ray imaging

A new current-programmed, current-output, active thin-film-transistor (TFT) image sensor suitable for real-time X-ray imaging (e.g., fluoroscopy) using hydrogenated amorphous silicon (a-Si:H), TFT technology is introduced. The proposed pixel circuit can successfully compensate for characteristic var...

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Veröffentlicht in:Electronics letters 2006-02, Vol.42 (3), p.1-1
Hauptverfasser: Safavian, N, Chaji, G R, Nathan, A, Rowlands, J A
Format: Artikel
Sprache:eng
Schlagworte:
Circuits
Imaging
Pixels
Real time
Semiconductor devices
Sensors
Thin film transistors
X-rays
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Beschreibung
Zusammenfassung:A new current-programmed, current-output, active thin-film-transistor (TFT) image sensor suitable for real-time X-ray imaging (e.g., fluoroscopy) using hydrogenated amorphous silicon (a-Si:H), 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.
ISSN:0013-5194
1350-911X