| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| linac flattening filter beam hardening | 1.92 | 1 | 9825 | 19 | 38 |
| linac | 1.25 | 1 | 4925 | 5 | 5 |
| flattening | 1.92 | 0.3 | 153 | 68 | 10 |
| filter | 0.56 | 0.5 | 6756 | 44 | 6 |
| beam | 2 | 0.7 | 9221 | 23 | 4 |
| hardening | 0.29 | 0.3 | 3071 | 71 | 9 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| linac flattening filter beam hardening | 1.89 | 0.2 | 978 | 61 |
| flattening filter in linac | 0.15 | 0.2 | 1433 | 85 |
