Table 3.
Estimated annual number of CT examinations and collective dose in Japan.
| CT examination | Annual number of CT examination (*106) | Annual collective dose (*103 Sv person) |
|
|---|---|---|---|
| Head | Total | 9.1 | 23.6 |
| Men | 4.6 | 12.1 | |
| Women | 4.5 | 11.5 | |
| Face | Total | 1.4 | 2.8 |
| Men | 0.7 | 1.5 | |
| Women | 0.7 | 1.3 | |
| Neck | Total | 10.1 | 26.5 |
| Men | 5.6 | 14.8 | |
| Women | 4.5 | 11.7 | |
| Chest | Total | 12.5 | 120.0 |
| Men | 7.0 | 67.8 | |
| Women | 5.5 | 52.2 | |
| Upper abdomen | Total | 10.3 | 83.1 |
| Men | 5.7 | 47.1 | |
| Women | 4.6 | 36.0 | |
| Lower abdomen | Total | 2.1 | 21.3 |
| Men | 1.1 | 12.0 | |
| Women | 1.0 | 9.3 | |
| Total | Total | 45.4 | 277.4 |
| Men | 24.7 | 155.3 | |
| Women | 20.8 | 122.1 | |