Fetal radiation dose for the different ionizing radiation techniques (modified after7 9)
| Imaging technique | Fetal radiation dose (mGy) |
| Chest X-ray | <0.01 |
| Mammography (two planes, bilateral) | <0.01 |
| CT of the head | <0.005–0.5 |
| CT of the chest | 0.001–0.66 |
| CT of the abdomen/pelvis | 8–25 |
| 99mTc bone scintigraphy | 3.3 |
| 18F-FDG PET/CT | 10–50 |