Dichromatic source for the application of dual-energy tissue cancellation in mammography

A. Tuffanelli, S. Fabbri, M. Marziani, A. Taibi, A. Sarnelli, M. Gambaccini

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A novel x-ray source, providing dichromatic beams for the application of dual-energy radiography, has been assembled and studied. The system works via Bragg diffraction, by monochromatizing the beam produced by a conventional W-anode x-ray tube with a mosaic crystal monochromator. The source generates a laminar beam (10 cm-high and 0.8 cm-wide), composed by two spatially superimposed quasi-monochromatic beams. The characteristics of the radiation field in terms of energy resolution and fluence have been reported, for three pairs of energies. A study of the spectra attenuated by several phantoms of breast equivalent tissue of different thicknesses shows that the optimal energy of the dichromatic beam for dual energy mammography application ranges between 18/36 keV and 18.6/37.2 keV and may be set as a function of the thickness or density of investigated tissue.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsL.E. Antonuk, M.J. Yaffe
Number of pages10
Publication statusPublished - 2002
EventMedical Imaging 2002: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 24 2002Feb 26 2002


OtherMedical Imaging 2002: Physics of Medical Imaging
Country/TerritoryUnited States
CitySan Diego, CA


  • Bragg diffraction
  • Dichromatic x-ray beams
  • Dual energy mammography
  • Mosaic crystal
  • Tungsten anode x-ray tube

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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