Patients were aged between 47 and 73 yr and had been
referred for a mammography examination as they were either symptomatic or high risk. The compressed breast thicknesses ranged from 24 to 92 mm (average of 54 mm), mean
glandular dose for a 50–60 mm breast was 2.09 mGy, calculated using the methodology described in the European protocol.15 The images were acquired at 24–34 kVp (average of
29 kVp), with a target/filter combination of either molybdenum/molybdenum or molybdenum/rhodium. The pixel size
was 70 lm.