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Imaging Characteristics of a Direct Conversion Full-Field Digital Mammography Detector using Selenium

  • Denny L. Lee
  • Jeffery G. Yorker
  • Zhenxue Jing
  • Lothar S. Jeromin
Conference paper

Abstract

A new flat panel full-field digital mammography, FFDM, system teams a DirectRay® selenium direct conversion detector technology and Lorad M-IV mammography x-ray generator with HTC x-ray scatter rejection grid. Modulation transfer function, MTF, approximates theoretical limits for the 70 µ pitch DirectRay® array. Detective quantum efficiency, DQE, approaches the ~70% theoretical maximum at zero-frequency for normal mammography x-ray exposure, and remains excellent at lower doses and higher frequencies. ACR phantom and breast images from production prototypes exhibit unprecedented image sharpness and near quantum noise limited operation. Clinical use of this FFDM system is expected to improve image quality at reduced patient dose compared to screen-film mammography.

Keywords

Modulation Transfer Function Digital Mammography Detective Quantum Efficiency Mammography System Reduce Patient Dose 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    D.L.Y. Lee, L.K. Cheung, L.S. Jeromin, “A New Digital Detector for Projection Radiography,” Physics of Medical Imaging 1995, SPIE Vol. 2432, pp. 237–249, Feb 1995.Google Scholar
  2. S.O. Kasap, V. Aiyah, B. Polischuk, A. Baillie, “X-ray Sensitivity of a-Se for X-ray Imaging with Electrostatic Readout,” Journal of Applied Physics, vol. 86 (6), pp. 2879 – 2887, 1998.CrossRefGoogle Scholar
  3. 3.
    L. Cheung and R. Coe, “Fullfield, Single Exposure Digital Mammography,” Medical Electronics, 13–21, Oct 1995.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Denny L. Lee
    • 1
  • Jeffery G. Yorker
    • 1
  • Zhenxue Jing
    • 1
    • 2
  • Lothar S. Jeromin
    • 1
  1. 1.Direct Radiography CorpNewarkUSA
  2. 2.Lorad DivisionHologic IncDanburyUSA

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