Table 4 Radiation dose rate, elapsed time, and cumulative dose due to staff exposure to thyroid cancer patients treated with RAI-131 for the Group-C
Phase | Range, average dose rate (μSv/h) | Elapsed time, (min) | Average accumulative dose, (μSv) | Dose reduction factor (FR) | Γ, (μSv m2/MBq h) |
|---|---|---|---|---|---|
2 h | (76.7–110.9) | 1.3 ± 0.2 | 2.03 ± 0.74 | 0.999 | 0.017 ± 0.003 |
93.5 ± 17.0 | |||||
Second day | (20.5–42.7) | 1.5 ± 0.3 | 0.79 ± 0.49 | 0.998 | 0.006 ± 0.002 |
31.6 ± 11.0 | |||||
Third day | (14.3–5.9) | 2.0 ± 0.1 | 0.34 ± 0.16 | 0.997 | 0.002 ± 0.001 |
10.1 ± 7.0 | |||||
Fourth day | (2.5–6.9) | 2.2 ± 0.5 | 0.17 ± 0.14 | 0.995 | 0.001 ± 0.001 |
4.7 ± 3.0 | |||||
Fifth day | (1.9–4.9) | 2.5 ± 0.9 | 0.14 ± 0.13 | 0.993 | 0.001 ± 0.001 |
3.4 ± 1.5 |