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Proceedings Paper

Characterization of the new co-doped CsI microcolumnar films for high-speed radiographic imaging
Author(s): Samta C. Thacker; Valeriy Gaysinskiy; Lena E. Ovechkina; Stuart R. Miller; Vivek V. Nagarkar; Charles Brecher; Alexander Lempicki; Ralph H. Bartram
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Paper Abstract

Despite its obvious advantages, well known CsI:Tl scintillator has two characteristic properties that undermine its use in clinical and high speed imaging: the presence of an afterglow component in its scintillation decay, and a hysteresis effect that causes drift in the scintillation yield after exposure to high radiation doses. We have previously reported that the addition of a second dopant, Sm2+, to the CsI:Tl crystals, significantly suppresses both afterglow and hysteresis. Here we report on the fabrication and characterization of the Sm co-doped CsI:Tl microcolumnar films to examine if these properties are preserved in films as well. Our preliminary data suggests that the Sm co-doped CsI:Tl films significantly improve temporal response relative to their CsI:Tl counterpart, and that the newly developed films demonstrate excellent spatial resolution. Various aspects of these effects and their consequences for imaging performance are discussed in this paper.

Paper Details

Date Published: 18 March 2008
PDF: 11 pages
Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69130Q (18 March 2008); doi: 10.1117/12.771438
Show Author Affiliations
Samta C. Thacker, Radiation Monitoring Devices (United States)
Valeriy Gaysinskiy, Radiation Monitoring Devices (United States)
Lena E. Ovechkina, Radiation Monitoring Devices (United States)
Stuart R. Miller, Radiation Monitoring Devices (United States)
Vivek V. Nagarkar, Radiation Monitoring Devices (United States)
Charles Brecher, ALEM Associates (United States)
Alexander Lempicki, ALEM Associates (United States)
Ralph H. Bartram, Univ. of Connecticut (United States)

Published in SPIE Proceedings Vol. 6913:
Medical Imaging 2008: Physics of Medical Imaging
Jiang Hsieh; Ehsan Samei, Editor(s)

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