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British Journal of Radiology (2006) 79, 123-129
© 2006 British Institute of Radiology
doi: 10.1259/bjr/84646476
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Image quality and breast dose of 24 screen–film combinations for mammography

A D Dimakopoulou, MSc1, I A Tsalafoutas, PhD2, E K Georgiou, MD, PhD1 and E N Yakoumakis, PhD1

1 Medical Physics Department, Medical School, University of Athens, 75 Mikras Asias, 115 27, Athens , 2 Medical Physics Unit, Konstantopoulio-Agia Olga Hospital, 3-5 Agias Olgas, Nea Ionia, 142 33, Athens, Greece


Figure 1
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  		Figure 1. The Hurter-Driffield(H&D) curves of the eight films included in this study are given. The optical densities (ODs) of the 21 steps of the sensitometric strips correspond to log relative exposure values (LogE) that range from 0 to 3, in steps of 0.15 each. In these figures, only the ODs for LogE=>ge;0.9 (steps 7 to 21) are presented in order to enhance the visibility of the differences in the linear part and the shoulder of the H&D curves.

 




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