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Proceedings Paper

Prototype CCD-based detector for whole-breast digital mammography
Author(s): Daniel Rosen; Walter Charles Phillips; Martin J. Stanton; Juanhui Xie; Daniel M. O'Mara; Alexander X. Stewart
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Paper Abstract

We describe a prototype multi-mode CCD-based detector for digital mammography. Each module incorporates a CCD bonded to a demagnifying fiberoptic taper. The x-ray-to-light converter is formed by depositing Gd2O2S:Eu onto the large end of the taper. The modules are held together in an array in order to cover a large area. We have constructed a 2-module prototype to evaluate the performance of this design and to develop software and hardware methods for the final multi-module detector. The 2-module detector forms an imaging area of 10 X 20 cm. with a 30-50 micrometers gap between the modules. Each module incorporates a 3.5:1 demagnifying fiberoptic taper and a 2048 X 2048, 14 micrometers -pixel CCD, resulting in an effective pixel size of 50 micrometers . For each 20keV x-ray photon incident on the phosphor converter approximately 7 electrons are generated in the CCD. For a 1 second exposure, the image noise is approximately 15 e/pixel and the dynamic range of the detector is approximately 20,000. The detector MTF is comparable to hat of a MinR screen/film system and the detector is able to resolve all features except the smallest spec group in an ACR phantom.

Paper Details

Date Published: 2 May 1997
PDF: 7 pages
Proc. SPIE 3032, Medical Imaging 1997: Physics of Medical Imaging, (2 May 1997); doi: 10.1117/12.274018
Show Author Affiliations
Daniel Rosen, Rosentiel Basic Medical Sciences Research Ctr. Brandeis Univ. (United States)
Walter Charles Phillips, Rosentiel Basic Medical Sciences Research Ctr. Brandeis Univ. (United States)
Martin J. Stanton, Rosentiel Basic Medical Sciences Research Ctr. Brandeis Univ. (United States)
Juanhui Xie, Rosentiel Basic Medical Sciences Research Ctr. Brandeis Univ. (United States)
Daniel M. O'Mara, Rosentiel Basic Medical Sciences Research Ctr. Brandeis Univ. (United States)
Alexander X. Stewart, Rosentiel Basic Medical Sciences Research Ctr. Brandeis Univ. (United States)


Published in SPIE Proceedings Vol. 3032:
Medical Imaging 1997: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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