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 Gy = 1,000 mrem
1 mrem = 0.001 Gy
例子:
将15 灰色的转换为搅拌：
15 Gy = 15,000 mrem
| 灰色的 | 搅拌 |
|---|---|
| 0.01 Gy | 10 mrem |
| 0.1 Gy | 100 mrem |
| 1 Gy | 1,000 mrem |
| 2 Gy | 2,000 mrem |
| 3 Gy | 3,000 mrem |
| 5 Gy | 5,000 mrem |
| 10 Gy | 10,000 mrem |
| 20 Gy | 20,000 mrem |
| 30 Gy | 30,000 mrem |
| 40 Gy | 40,000 mrem |
| 50 Gy | 50,000 mrem |
| 60 Gy | 60,000 mrem |
| 70 Gy | 70,000 mrem |
| 80 Gy | 80,000 mrem |
| 90 Gy | 90,000 mrem |
| 100 Gy | 100,000 mrem |
| 250 Gy | 250,000 mrem |
| 500 Gy | 500,000 mrem |
| 750 Gy | 750,000 mrem |
| 1000 Gy | 1,000,000 mrem |
| 10000 Gy | 10,000,000 mrem |
| 100000 Gy | 100,000,000 mrem |
规则