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 mSv = 0.1 R
1 R = 10 mSv
例子:
将15 毫米转换为罗恩根：
15 mSv = 1.5 R
| 毫米 | 罗恩根 |
|---|---|
| 0.01 mSv | 0.001 R |
| 0.1 mSv | 0.01 R |
| 1 mSv | 0.1 R |
| 2 mSv | 0.2 R |
| 3 mSv | 0.3 R |
| 5 mSv | 0.5 R |
| 10 mSv | 1 R |
| 20 mSv | 2 R |
| 30 mSv | 3 R |
| 40 mSv | 4 R |
| 50 mSv | 5 R |
| 60 mSv | 6 R |
| 70 mSv | 7 R |
| 80 mSv | 8 R |
| 90 mSv | 9 R |
| 100 mSv | 10 R |
| 250 mSv | 25 R |
| 500 mSv | 50 R |
| 750 mSv | 75 R |
| 1000 mSv | 100 R |
| 10000 mSv | 1,000 R |
| 100000 mSv | 10,000 R |
规则