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 μSv = 1.0000e-4 rem
1 rem = 10,000 μSv
例子:
将15 Microsievert转换为REM：
15 μSv = 0.001 rem
| Microsievert | REM |
|---|---|
| 0.01 μSv | 1.0000e-6 rem |
| 0.1 μSv | 1.0000e-5 rem |
| 1 μSv | 1.0000e-4 rem |
| 2 μSv | 0 rem |
| 3 μSv | 0 rem |
| 5 μSv | 0.001 rem |
| 10 μSv | 0.001 rem |
| 20 μSv | 0.002 rem |
| 30 μSv | 0.003 rem |
| 40 μSv | 0.004 rem |
| 50 μSv | 0.005 rem |
| 60 μSv | 0.006 rem |
| 70 μSv | 0.007 rem |
| 80 μSv | 0.008 rem |
| 90 μSv | 0.009 rem |
| 100 μSv | 0.01 rem |
| 250 μSv | 0.025 rem |
| 500 μSv | 0.05 rem |
| 750 μSv | 0.075 rem |
| 1000 μSv | 0.1 rem |
| 10000 μSv | 1 rem |
| 100000 μSv | 10 rem |
规则