The following table provides the dose rates (in mSv/h) at 1 meter per TBq for different radionuclides, and the corresponding thickness of lead shielding (in cm) required to reduce the dose rate to 1 μSv/h.
| Radionuclide | 99mTc | 111In | 18F | 124I |
|---|---|---|---|---|
| Dose Rate (mSv/h) at 1m per TBq | 18 | 81 | 135 | 117 |
| Thickness of Lead Shield (cm) for 1 μSv/h at TBq | 0.28 | 1.0 | 5.8 | 20 |
| 1.0 TBq | 0.36 | 1.3 | 7.1 | 22 |
| 10.0 TBq | 0.43 | 1.6 | 8.5 | 27 |