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 rem = 10,000 μSv
1 μSv = 1.0000e-4 rem
例子:
将15 REM转换为Microsievert：
15 rem = 150,000 μSv
| REM | Microsievert |
|---|---|
| 0.01 rem | 100 μSv |
| 0.1 rem | 1,000 μSv |
| 1 rem | 10,000 μSv |
| 2 rem | 20,000 μSv |
| 3 rem | 30,000 μSv |
| 5 rem | 50,000 μSv |
| 10 rem | 100,000 μSv |
| 20 rem | 200,000 μSv |
| 30 rem | 300,000 μSv |
| 40 rem | 400,000 μSv |
| 50 rem | 500,000 μSv |
| 60 rem | 600,000 μSv |
| 70 rem | 700,000 μSv |
| 80 rem | 800,000 μSv |
| 90 rem | 900,000 μSv |
| 100 rem | 1,000,000 μSv |
| 250 rem | 2,500,000 μSv |
| 500 rem | 5,000,000 μSv |
| 750 rem | 7,500,000 μSv |
| 1000 rem | 10,000,000 μSv |
| 10000 rem | 100,000,000 μSv |
| 100000 rem | 1,000,000,000 μSv |
规则