| Operation | MRI | Total | |
1.5 T | Positive | 44 | 6 | 50 |
Negative | 20 | 28 | 48 | |
Total | 64 | 34 | 98 | |
3.0 T | Positive | 26 | 2 | 28 |
Negative | 10 | 17 | 27 | |
Total | 36 | 19 | 55 |