Progress in gas detector technology for medical imaging research

George C. Giakos; Samir Chowdhury; Bindu Pillai; P. Ghotra; Srinivasan Vedantham; Amlan Dasgupta; Frank A. DiBianca; Sreenivas Devidas; Robert J. Endorf

doi:10.1117/12.237842

11 April 1996 Progress in gas detector technology for medical imaging research

George C. Giakos, Samir Chowdhury, Bindu Pillai, P. Ghotra, Srinivasan Vedantham, Amlan Dasgupta, Frank A. DiBianca, Sreenivas Devidas, Robert J. Endorf

Author Affiliations +

Proceedings Volume 2708, Medical Imaging 1996: Physics of Medical Imaging; (1996) https://doi.org/10.1117/12.237842
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

Abstract

The x-ray capture, conversion into charge carriers, ion transport mechanisms and image formation mechanisms within a high-gas pressure digital radiographic system, operating up to 60 atm., are presented and analyzed. In detail, the physics of the high-pressure KCD imaging detectors is exposed, analyzed and related to the detector and image quality parameters. Specifically, this study indicates that ion diffusion cannot account for all the experimental observations. It advances the hypothesis that, at sufficiently high pressures, formation of molecular clusters with narrowed mobility distribution take place, through energy exchange mechanism, with local potential forces such that they compensate the space charge distortion of the applied field strength.

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George C. Giakos, Samir Chowdhury, Bindu Pillai, P. Ghotra, Srinivasan Vedantham, Amlan Dasgupta, Frank A. DiBianca, Sreenivas Devidas, and Robert J. Endorf "Progress in gas detector technology for medical imaging research", Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); https://doi.org/10.1117/12.237842

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KEYWORDS

Sensors

Ions

Krypton

Quantum efficiency

Photons

X-rays

Image sensors

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