K-edge digital subtraction imaging based on a dichromatic and compact x-ray source

A. Sarnelli, A. Taibi, A. Tuffanelli, G. Baldazzi, D. Bollini, A. E. Cabal Rodriquez, M. Gombia, F. Prino, L. Ramello, E. Tomassi, M. Gambaccini

Research output: Contribution to journalArticlepeer-review


This work proposes a compact dichromatic imaging system for the application of the K-edge digital subtraction technique based on a conventional x-ray tube and a monochromator system. A quasi-monochromatic x-ray beam at the energy of iodine K-edge is produced by Bragg diffraction on a mosaic crystal. Two thin adjacent beams with energies that bracket the K-edge discontinuity are obtained from the diffracted beam by means of a proper collimation system. They are then detected using an array of Si detectors. A home-made phantom is used to study the image quality as a function of iodine concentration. Signal and signal-to-noise ratio analysis has also been performed. The results are compared with theoretical expectations.

Original languageEnglish
Pages (from-to)3291-3305
Number of pages15
JournalPhysics in Medicine and Biology
Issue number14
Publication statusPublished - Jul 21 2004

ASJC Scopus subject areas

  • Biomedical Engineering
  • Physics and Astronomy (miscellaneous)
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology


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