Dose Rates of 18F Vial in Air and Shielded with 0.318 or 5.08-cm-Thick Lead
| Distance (m) | Dose rate in air (μGy/h/370 MBq) | 0.318-cm lead shielding | 5.08-cm lead shielding | ||||
|---|---|---|---|---|---|---|---|
| Dose rate (μGy/h/370 MBq) | Lead/in-air dose-rate ratio | Dose rate (μGy/h/370 MBq) | Lead/in-air dose-rate ratio | ||||
| 0.50 | 226 | 136 | 0.60 | 4.53 | 0.020 | ||
| 1.00 | 63.3 | 35.0 | 0.55 | 2.48 | 0.039 | ||
| 1.50 | 30.5 | 15.9 | 0.52 | 1.39 | 0.046 | ||
| 2.00 | 14.3 | 8.99 | 0.63 | 0.56 | 0.039 | ||
| 2.50 | 9.32 | 5.44 | 0.58 | ||||
| 3.00 | 6.25 | 4.06 | 0.65 | ||||
| 3.50 | 4.85 | 2.95 | 0.61 | ||||
| 4.00 | 3.93 | 2.34 | 0.60 | ||||
| 4.50 | 3.27 | 1.76 | 0.54 | ||||
| 5.00 | 2.55 | 1.19 | 0.47 | ||||