Table 1.
US mammography capacity by year, 2003–2009
| Year | Facilities | Mammography machines, totala | Counties with no machines | Digital machinesc | Mobile units | Counties with at least 1 mobile unit |
|---|---|---|---|---|---|---|
| N | N | N (%b) | N (% total) | N | % | |
| 2003 | 8,936 | 13,400 | 866 (27.6) | 350 (2.6) | 305 | 6.2 |
| 2004 | 8,827 | 13,408 | 852 (27.1) | 544 (4.1) | 262 | 5.6 |
| 2005 | 8,704 | 13,394 | 852 (27.2) | 860 (6.4) | 215 | 4.4 |
| 2006 | 8,655 | 13,314 | 860 (27.4) | 1,437 (10.8) | 180 | 3.5 |
| 2007 | 8,647 | 12,993 | 857 (27.3) | 2,595 (20.0 | 155 | 3.1 |
| 2008 | 8,616 | 12,548 | 856 (27.3) | 4,662 (37.2) | 160 | 3.0 |
| 2009 | 8,505 | 12,098 | 870 (27.7) | 6,572 (54.3) | 225 | 4.7 |
a
Sum of number of film screen units, full field digital units, and computed radiology units
b
Percentage of all 3,141 US counties
c
Full field digital units or computed radiology units