Translator Disclaimer
5 June 2003 New design of a structured CsI(Tl) screen for digital mammography
Author Affiliations +
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.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vivek V. Nagarkar, Sameer V. Tipnis, Valeriy B. Gaysinskiy, Stuart R. Miller, Andrew Karellas, and Srinivasan Vedantham "New design of a structured CsI(Tl) screen for digital mammography", Proc. SPIE 5030, Medical Imaging 2003: Physics of Medical Imaging, (5 June 2003);

Back to Top