Table 6.
Estimated effective doses per scan and examination for each anatomical location in Japan, and comparison with previous studies.
| CT examination | Effective dose for one scanning/one examination (mSv) | |||||
|---|---|---|---|---|---|---|
| Year Study |
2008 Current (Japan) |
2000 Japan (13) |
2002 Germany (15) |
2003 UK (16) |
2003-2004 Netherlands (14) |
|
| Head | Scan | 2.5 | - | 2.2 | 0.8* | 1.9 |
| Examination | 2.6 | 2.4 | 2.8 | 1.5 | - | |
| Face | Scan | 1.5 | - | 0.8 | - | - |
| Examination | 2.0 | - | 0.8 | - | - | |
| Neck | Scan | 2.3 | - | - | - | - |
| Examination | 2.6 | - | - | - | - | |
| Chest | Scan | 5.4 | - | 5.5 | 3.4* | 3.8 |
| Examination | 9.6 | 9.1 | 5.7 | 5.8 | - | |
| Upper abdomen | Scan | 5.7 | - | 5.5 | 3.8* | 7.2 |
| Examination | 8.1 | 12.9 | 11.5 | 5.3 | 10.2** | |
| Lower abdomen | Scan | 8.3 | - | 6.3 | - | - |
| Examination | 10.3 | 10.5 | 7.2 | - | - | |
-: no data.
*: Effective doses for one examination were divided by the number of scanning of the routine sequences.
**: Sum of the effective doses of arterial and portal scans.