Experimental study of Compton scattering reduction in digital mammographic imaging

S.R. Amendolia, M.G. Bisogni, P. Delogu, M.E. Fantacci, M. Novelli, P. Oliva, M. Quattrocchi, V. Rosso, A. Stefanini, S. Zucca
2001 IEEE Nuclear Science Symposium Conference Record (Cat. No.01CH37310)  
In mammography, the first cause of image contrast reduction arises from the photons scattered inside the examined organ. The amount of Compton scattering strongly depends on the irradiation area and on the distance between the organ and the X-ray detector. We have experimentally evaluated how these geometrical conditions affect the scattering fraction. Our experimental setup includes a single photon counting device based on a silicon pixel detector as X-ray sensor, a lucite cylinder to simulate
more » ... ylinder to simulate the breast tissue, and a lead collimator to define the irradiation area. We have evaluated the contrast and the signal-to-noise ratio for images acquired in different conditions. Index Terms-Contrast, mammography, pixel detector, scattered photons, signal-to-noise ratio (SNR), single photon counting chip.
doi:10.1109/nssmic.2001.1008653 fatcat:5kunghr4s5cu3cx2ioyv7ew32u