New design of a structured CsI(Tl) screen for digital mammography

Vivek V. Nagarkar, Sameer V. Tipnis, Valeriy B. Gaysinskiy, Stuart R. Miller, Andrew Karellas, Srinivasan Vedantham

Research output: Contribution to journalConference articlepeer-review

24 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)541-546
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5030 II
DOIs
StatePublished - Sep 15 2003
Externally publishedYes
EventMedical Imaging 2003: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 16 2003Feb 18 2003

Keywords

  • CsI(Tl) scintillator screen
  • Digital radiography
  • Mammography

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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