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Proceedings Paper

Imaging parameters of a kinestatic charge detector containing Kr, NH3, and CO2 at 80 atm
Author(s): Frank A. DiBianca; Sreenivas Devidas; George C. Giakos; Shashidhar Kollipara; Senthilkumar Nagarajan; Qian Peng
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Paper Abstract

In this paper, modulation transfer function and image noise measurements are presented for Kinestatic Charge Detectors employing high-pressure Kr gas doped with NH3 and CO2. Kr improves spatial resolution over Xe because, at equal x-ray mean free path, it has both reduced fluorescence reabsorption and reduced electron range. NH3 eliminates mobility dispersion (disparate ionic mobilities from multiple charge carriers) caused by gas impurities. CO2 reduces electron attachment and thus ion-ion recombination because it lowers the electron temperature, thereby increasing electron drift velocity via the Ramsauer effect.

Paper Details

Date Published: 26 May 1994
PDF: 11 pages
Proc. SPIE 2132, Clinical Applications of Modern Imaging Technology II, (26 May 1994); doi: 10.1117/12.176569
Show Author Affiliations
Frank A. DiBianca, Univ. of Tennessee/Memphis (United States)
Sreenivas Devidas, Univ. of Tennessee/Memphis (United States)
George C. Giakos, Univ. of Tennessee/Memphis (United States)
Shashidhar Kollipara, Univ. of Tennessee/Memphis (United States)
Senthilkumar Nagarajan, Univ. of Tennessee/Memphis (United States)
Qian Peng, Univ. of Tennessee/Memphis (United States)


Published in SPIE Proceedings Vol. 2132:
Clinical Applications of Modern Imaging Technology II
Leonard J. Cerullo M.D.; Kenneth S. Heiferman M.D.; Hong Liu; Halina Podbielska M.D.; Abund Ottokar Wist; Lucia J. Zamorano, Editor(s)

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