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Radiation doses in the UK trial of breast screening in women aged 40–48 years

National Co-ordinating Centre for the Physics of Mammography, Medical Physics Department, Royal Surrey County Hospital, Guildford GU2 7XX, UK

View larger version (31K): [in a new window]   Figure 1. Histogram of meanglandular dose per film for mediolateral oblique views. Doses are corrected for composition and spectra used. Axis labels represent the mid-point of 0.2 mGy bands.

View larger version (23K): [in a new window]   Figure 2. Histogram of total mean glandular doses per woman forone-view examinations. Axis labelsrepresent the mid-point of 0.5 mGybands. Composition and spectral correction factors were applied.

View larger version (14K): [in a new window]   Figure 3. Mean glandular dose per film (main mediolateral oblique films only) as a function of compressed breast thickness for manual (•) and automatic () beam quality selection. The error bars show 95% confidence limits; for some data points the errors are too small to be seen. Composition and spectral correction factors were applied.

View larger version (18K): [in a new window]   Figure 4. The average mean glandular dose (MGD) for the main mediolateral oblique films plotted against the MGD to the standard breast for each unit. Composition and spectral correction factors were applied. The error bars show 95% confidence limits.