论文信息 - 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 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.

Arokia Nathan | John A. Rowlands | N. Safavian | Gholamreza Chaji

[1] R. D. McGrath,et al. Design and analysis of a 512/spl times/768 current-mediated active pixel array image sensor , 1997 .

[2] Arokia Nathan,et al. Threshold voltage shift compensated active pixel sensor array for digital X-ray imaging in a-Si technology , 2005 .

[3] Arokia Nathan,et al. Amorphous silicon active pixel sensor readout circuit for digital imaging , 2003 .

[4] Peyman Servati,et al. Above-threshold parameter extraction and modeling for amorphous silicon thin-film transistors , 2003 .

[5] M. Z. Kabir,et al. Direct conversion X-ray sensors: sensitivity, DQE and MTF , 2003 .