| Subjects | Whole body dose (mSv) | Brain organ dose (mSv) |
|---|---|---|
| Patients | ||
| Skull X-ray | 1.8 | 0.9 |
| Thyroid isotope scan | 3.2 | 1 |
| Cerebral angiography | 8 | 5 |
| Head CT | 1.6 | 20 |
| Interventional Neuroradiology | 20–100 | 200–1,000 |
| Doctors | ||
| Per procedure | 0.03 | 0.3 |
| Lifetime (40 years) | 200 | 2,000 |
| Radiotherapy | ||
| Per cycle | 1,000–40,000 | 10,000–400,000 |