We have investigated a non-conventional angiographic imaging methodology called dual energy angiography (DEA) based on a quasi-monochromatic X-rays source. An experimental DEA apparatus was developed. The Bragg monochromator, mounted on a standard W-anode X-ray tube, generates two thin parallel beams with energies peaked before (at EL=31.1 keV) and after (at EH=35.3 keV) the iodine K-edge (EK=33.2 keV). Images result as the difference between the logarithms of the transmitted intensities of the two beams. A dedicated dynamic phantom, simulating different tissues absorption and containing calibrated vessels, was scanned under the monochromator slits by a PC-controlled scanning system. Two types of detectors were used and tested: a linear CCD coupled with FOS and a Si-strips detector with energy window discriminator. In this work resulting imaging capabilities of the DEA experimental system were compared with those of a commercial SIEMENS ANGIOSTAR digital subtraction angiographic apparatus.

Characterization of a Dual Energy Angiographic System with CCD+FOS and Si-strips Detectors

BALDAZZI, GIUSEPPE;GOMBIA, MIRKO;ROSSI, PIER LUCA;
2004

Abstract

We have investigated a non-conventional angiographic imaging methodology called dual energy angiography (DEA) based on a quasi-monochromatic X-rays source. An experimental DEA apparatus was developed. The Bragg monochromator, mounted on a standard W-anode X-ray tube, generates two thin parallel beams with energies peaked before (at EL=31.1 keV) and after (at EH=35.3 keV) the iodine K-edge (EK=33.2 keV). Images result as the difference between the logarithms of the transmitted intensities of the two beams. A dedicated dynamic phantom, simulating different tissues absorption and containing calibrated vessels, was scanned under the monochromator slits by a PC-controlled scanning system. Two types of detectors were used and tested: a linear CCD coupled with FOS and a Si-strips detector with energy window discriminator. In this work resulting imaging capabilities of the DEA experimental system were compared with those of a commercial SIEMENS ANGIOSTAR digital subtraction angiographic apparatus.
Nuclear Science Symposium Conference Record, 2004 IEEE
3234
3238
G. Baldazzi; D. Bollini; A.E. Cabal Rodriguez; M. Gambaccini; M. Gombia; P. Grybos; J. Lopez Gaitan; G. Pancaldi; F. Prino; L. Ramello; L. Roma; P. L. Rossi; A. Sarnelli; K. Swientek; A. Taibi; A. Tuffanelli; M. Zuffa
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/111417
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