Baldelli, Paola and Bacci, Alberto and Bottigli, Ubaldo and Ferrario, Massimo and Gambaccini, Mauro and Giulietti, Danilo and Golosio, Bruno and Maroli, Cesare and Oliva, Piernicola and Petrillo, Vittoria and Serafini, Luca and Stumbo, Simone and Taibi, Angelo and Tomassini, Paolo and Vaccarezza, Cristina (2007) Dependence of image quality on energy spread for a Bragg diffraction based radiography system. Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 580 (2), p. 986-989. ISSN 0168-9002. Article.
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The aim of this work is to investigate the relationship between contrast and energy resolution of a quasi-monochromatic X-ray system based on Bragg diffraction on a mosaic crystal. Three different energies have been considered: 18, 22 and 26 keV. A commercial phantom containing large and small area details and a digital detector have been used. Results show that for large area details and for a certain value of energy, the energy spread of the incident X-ray beams produces a small reduction of the contrast, while for small area details the high reduction of the contrast is principally due to the spatial resolution properties of the system.
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