European Radiology

, Volume 16, Issue 11, pp 2559–2566

Dose comparison between screen/film and full-field digital mammography

Authors

    • Department of Oncological and Surgical SciencesPadua University
    • Department of PhysicsINFN (National Institute of Nuclear Physics)
  • Cosimo di Maggio
    • Department of Oncological and Surgical SciencesPadua University
Breast

DOI: 10.1007/s00330-006-0314-2

Cite this article as:
Gennaro, G. & di Maggio, C. Eur Radiol (2006) 16: 2559. doi:10.1007/s00330-006-0314-2

Abstract

The study purpose was the comparison between doses delivered by a full-field digital mammography system and a screen/film mammography unit, both using the same type of X-ray tube. Exposure parameters and breast thickness were collected for 300 screen/film (GE Senographe DMR) and 296 digital mammograms (GE Senographe 2000D). The entrance surface air kerma (ESAK) was calculated from anode/filter combination, kVp and mAs values and breast thickness, by simulating spectra through a program based on a catalogue of experimental X-ray spectra. The average glandular dose (AGD) was also computed. Results showed an overall reduction of average glandular dose by 27% of digital over screen/film mammography. The dose saving was about 15% for thin and thick breasts, while it was between 30% and 40% for intermediate thicknesses. Full-field digital mammography dose reduction is allowed by wider dynamic range and higher efficiency of digital detector, which can be exposed at higher energy spectra than screen/film mammography, and by the separation between acquisition and displaying processes.

Keywords

MammographyDigital mammographyDosimetry in mammographyAverage glandular dose

Copyright information

© Springer-Verlag 2006