放射性是不稳定原子核因辐射失去能量的过程。它以Becquerels（BQ）进行测量。
1 mrem = 0.1 rem
1 rem = 10 mrem
例子:
将15 搅拌转换为REM：
15 mrem = 1.5 rem
| 搅拌 | REM |
|---|---|
| 0.01 mrem | 0.001 rem |
| 0.1 mrem | 0.01 rem |
| 1 mrem | 0.1 rem |
| 2 mrem | 0.2 rem |
| 3 mrem | 0.3 rem |
| 5 mrem | 0.5 rem |
| 10 mrem | 1 rem |
| 20 mrem | 2 rem |
| 30 mrem | 3 rem |
| 40 mrem | 4 rem |
| 50 mrem | 5 rem |
| 60 mrem | 6 rem |
| 70 mrem | 7 rem |
| 80 mrem | 8 rem |
| 90 mrem | 9 rem |
| 100 mrem | 10 rem |
| 250 mrem | 25 rem |
| 500 mrem | 50 rem |
| 750 mrem | 75 rem |
| 1000 mrem | 100 rem |
| 10000 mrem | 1,000 rem |
| 100000 mrem | 10,000 rem |
规则