Characterization of the new co-doped CsI microcolumnar films for high-speed radiographic imaging

Samta C. Thacker; Valeriy Gaysinskiy; Lena E. Ovechkina; Stuart R. Miller; Vivek V. Nagarkar; Charles Brecher; Alexander Lempicki; Ralph H. Bartram

doi:10.1117/12.771438

18 March 2008 Characterization of the new co-doped CsI microcolumnar films for high-speed radiographic imaging

Samta C. Thacker, Valeriy Gaysinskiy, Lena E. Ovechkina, Stuart R. Miller, Vivek V. Nagarkar, Charles Brecher, Alexander Lempicki, Ralph H. Bartram

Author Affiliations +

Proceedings Volume 6913, Medical Imaging 2008: Physics of Medical Imaging; 69130Q (2008) https://doi.org/10.1117/12.771438
Event: Medical Imaging, 2008, San Diego, California, United States

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.

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Samta C. Thacker, Valeriy Gaysinskiy, Lena E. Ovechkina, Stuart R. Miller, Vivek V. Nagarkar, Charles Brecher, Alexander Lempicki, and Ralph H. Bartram "Characterization of the new co-doped CsI microcolumnar films for high-speed radiographic imaging", Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69130Q (18 March 2008); https://doi.org/10.1117/12.771438

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