Imaging Characterization of an Experimental Apparatus for Dual Energy Angiography

Giuseppe Baldazzi, Terenzio Bernardi, Dante Bollini, Mauro Gambaccini, Mirko Gombia, Pier Luca Rossi, Anna Sarnelli, Angelo Taibi, Alessandra Tuffanelli, Giulio Pancaldi, Mirco Zuffa

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


In angiographic practice an iodate contrast medium is injected in patient vessels with catheters. The absorption of X-rays rises immediately above the Iodine K-edge energy (33.17 keV), permitting to distinguish human soft tissues characterized by similar absorption's coefficients. Conventional image subtraction technique uses two images, acquired before and after the injection of the contrast medium, respectively. The vessels' morphology results from the difference of images so obtained. A different approach is presented: two quasi-monochromatic peaks, having mean energies lower and higher than the Iodine K-edge, are produced with a pyrolytic graphite crystal monochromator and split in two thin parallel beams, respectively. These two beams impinge on phantoms simulating patient vessels and are detected with solid-state array detectors. The image results as the difference between the intensities of the two beams emerging from patient tissues and Iodine. In this work, we show results and first image of a phantom, characterized by calibrated vessels inside, obtained with an experimental apparatus to perform a double energy scanning in a 120mm ×120mm field of view.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposium and Medical Imaging Conference
EditorsS. Metzler
Number of pages3
Publication statusPublished - 2002
Event2002 IEEE Nuclear Science Symposium Conference Record - Norfolk, VA, United States
Duration: Nov 10 2002Nov 16 2002


Other2002 IEEE Nuclear Science Symposium Conference Record
Country/TerritoryUnited States
CityNorfolk, VA

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering


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