Dosage and risk associated with diagnostic x-ray procedures, www.hpa.org.uk (accessed Oct 2010)
| Diagnostic x-ray procedure | Typical effective doses (mSv) | Lifetime additional risk of fatal cancer per examination |
| Chest | 0.02 | 1 in 1 000 000 |
| Pelvis | 0.7 | 1 in 30 000 |
| Abdomen | 0.7 | 1 in 30 000 |
| Barium follow-through | 3 | 1 in 6700 |
| Barium enema | 7 | 1 in 3000 |
| CT abdomen/pelvis | 10 | 1 in 2000 |