In mammography, the first cause of image contrastarises 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 Incite cylinder 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. RI Oliva, Piernicola/E-5839-2012
Experimental study of Compton scattering reduction in digital mammographic imaging
BISOGNI, MARIA GIUSEPPINA;DELOGU, PASQUALE;FANTACCI, MARIA EVELINA;ROSSO, VALERIA;STEFANINI, ARNALDO;
2002-01-01
Abstract
In mammography, the first cause of image contrastarises 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 Incite cylinder 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. RI Oliva, Piernicola/E-5839-2012I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
