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Light-Response Characteristics of Amorphous Silicon Arrays for Megavoltage and Diagnostic Imaging

  • L. E. Antonuk (a1), J. Yorkston (a1), C. W. Kim (a1), W. Huang (a1), E. J. Morton (a1), M. J. Longo (a2) and R. A. Street (a3)...


Light-sensitive hydrogenated amorphous silicon pixel arrays are now under development for real-time megavoltage and diagnostic fluoroscopic imaging. Such applications place stringent demands upon a variety of array properties including the uniformity of the light-response function of the pixels. It is desirable that the design and fabrication of these imaging arrays maximize such uniformity. The implications of uniformity for imaging are reviewed, and data obtained from small arrays are presented and discussed.



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[1] Antonuk, L.E., et al.: “Large area amorphous silicon photodiode arrays for radiotherapy and diagnostic imaging.” Accepted for publication in Nucl. Instr. and Meth., 1991.
[2] Antonuk, L.E., et al.: “Signal, noise, and readout considerations in the development of amorphous silicon photodiode arrays for radiotherapy and diagnostic x-ray imaging”. Accepted for publication in proceedings of the SPIE Conference “Medical Imaging V”, San Jose, CA (1991).
[3] Street, R.A., et al., Material Research Society Proc. 192, 441 (1990).


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