Table 12.

Average doses for breasts with compressed thickness ≥90 mm

	View	2001–02 All	2010–12 film-screen	2010–12 DR	2010–12 CR
MGD per film (mGy) (±2 standard error in mean)	OB	5.07 ± 0.27	4.61 ± 0.38	2.65 ± 0.09	6.92 ± 0.98
	CC	3.55 ± 0.72	3.64 ± 0.76	2.30 ± 0.18	–
Number of films (proportion of women)	OB	261 (0.81%)	109 (0.64%)	446 (1.75%)	2
	CC	28 (0.15%)	23 (0.13%)	116 (0.46%)	0
Average compressed breast thickness (mm) (±2 standard error in mean)	OB	95.0 ± 0.5	95.9 ± 1.0	94.7 ± 0.4	92.0 ± 2.0
	CC	95.8 ± 1.8	93.3 ± 1.2	93.9 ± 0.8	–

CC, craniocaudal; CR, computed radiography; DR, digital radiography; MGD, mean glandular dose; OB, oblique projection.