| since the early 1980s | 5 | temporal |
| prior to surgery | 2 | temporal |
| repeatedly | 2 | temporal |
| mri → be → technique | 20 |
| mri → be → utilized | 7 |
| mri → be → employed | 6 |
| mri → be → method | 5 |
| mri → be in → use | 4 |
| negative | neutral | positive |
| 0.070 | 0.798 | 0.132 |
| Raw frequency | 42 |
| Normalized frequency | 0.558 |
| Modifier score | 0.500 |
| Perplexity | 49.067 |