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Proceedings Paper

New design of a structured CsI(Tl) screen for digital mammography
Author(s): Vivek V. Nagarkar; Sameer V. Tipnis; Valeriy B. Gaysinskiy; Stuart R. Miller; Andrew Karellas; Srinivasan Vedantham
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Paper Abstract

Columnar CsI(Tl) screens are now routinely used for digital x-ray imaging in a wide variety of applications such as mammography, dental radiography, and non-destructive testing. While commercially available CsI(Tl) screens exhibit excellent properties, it is possible to significantly improve their performance. Here, we report on a new design of a columnar CsI(Tl) screen. Specifically, columnar CsI(Tl) screens were subjected to mechanical pixelation for minimizing the long range spread of scintillation light within the film, thus enhancing spatial and contrast resolution, and increasing the detective quantum efficiency (DQE(f)) of the digital imaging detector. To date we have fabricated up to 200 μm thick pixelated CsI(Tl) screens for mammography, and characterized their performance using a CCD camera. This paper presents a comparison of the new pixelated CsI(Tl) screens, conventional columnar CsI(Tl) screens, and Gd2O2S(Tb) screens. The data show that pixelated screens substantially improve the DQE(f) of the digital imaging system.

Paper Details

Date Published: 5 June 2003
PDF: 6 pages
Proc. SPIE 5030, Medical Imaging 2003: Physics of Medical Imaging, (5 June 2003); doi: 10.1117/12.480249
Show Author Affiliations
Vivek V. Nagarkar, Radiation Monitoring Devices, Inc. (United States)
Sameer V. Tipnis, Radiation Monitoring Devices, Inc. (United States)
Valeriy B. Gaysinskiy, Radiation Monitoring Devices, Inc. (United States)
Stuart R. Miller, Radiation Monitoring Devices, Inc. (United States)
Andrew Karellas, Emory Univ. School of Medicine (United States)
Srinivasan Vedantham, Emory Univ. School of Medicine (United States)


Published in SPIE Proceedings Vol. 5030:
Medical Imaging 2003: Physics of Medical Imaging
Martin J. Yaffe; Larry E. Antonuk, Editor(s)

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