A digital system based on a bi-chromatic X ray source and a single photon counting device: A single exposure dual energy mammography approach

M. G. Bisogni, S. Fabbri, M. Gambaccini, M. Marziani, M. Novelli, M. Quattrocchi, V. Rosso, P. Russo, A. Sarnelli, A. Stefanini, S. Zucca

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

Abstract

In this work we exploit the advantages of using a bi-chromatic X-rays source coupled with a single photon counting pixel detector to perform a feasibility study for dual energy mammography. This technique allows enhancing the contrast between different breast tissues by composing two images acquired at two different energies. The high and low energy images have been acquired by a single X-ray shot. The bi-chromatic beam has been produced per diffraction of polychromatic photons by a monochromator crystal. The imaging system is based on a single photon counting silicon pixel detector. The data read-out is performed by a VLSI Integrated Circuit bump-bonded to the sensor. The energy threshold of each electronics channel can be individually trimmed. We set the threshold of one pixel below 16 keV while the threshold of the neighbouring pixel between 16 and 32 keV. With a single exposure the information from both energies is recorded. After separation between low and high threshold pixels, we obtained two independent images. We acquired radiographs of phantoms made of three different materials. Appling a dual energy algorithm, we obtained synthesized images where any of the three materials is removed from the radiograph, enhancing the contrast between the two remaining.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsL.E. Antonuk, M.J. Yaffe
Pages620-632
Number of pages13
Volume4682
DOIs
Publication statusPublished - 2002
EventMedical Imaging 2002: Physics of Medical Imaging - San Diego, CA, United States
Duration: Feb 24 2002Feb 26 2002

Other

OtherMedical Imaging 2002: Physics of Medical Imaging
CountryUnited States
CitySan Diego, CA
Period2/24/022/26/02

Keywords

  • Digital mammography
  • Dual energy
  • Pixel detectors
  • Quasi-monochromatic X ray beams

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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    Bisogni, M. G., Fabbri, S., Gambaccini, M., Marziani, M., Novelli, M., Quattrocchi, M., Rosso, V., Russo, P., Sarnelli, A., Stefanini, A., & Zucca, S. (2002). A digital system based on a bi-chromatic X ray source and a single photon counting device: A single exposure dual energy mammography approach. In L. E. Antonuk, & M. J. Yaffe (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4682, pp. 620-632) https://doi.org/10.1117/12.465607