Distribution of Target Volumes According to Proposed Classification
| Classification | No. of target volumes | % of total |
|---|---|---|
| Class I (PET in MRI) | 26 | 36.1 |
| IA | 11 | 15.3 |
| IB | 3 | 4.2 |
| IC | 12 | 16.7 |
| Class II (PET ≠ MRI) | 19 | 26.4 |
| IIA | 3 | 4.2 |
| IIB | 13 | 18.1 |
| IIC | 3 | 4.2 |
| Class III (MRI in PET) | 6 | 8.3 |
| IIIA | 5 | 6.9 |
| IIIB | — | — |
| IIIC | 1 | 1.4 |
| Class IV (PET = MRI) | 3 | 4.2 |
| Class V (PET only) | 8 | 11.1 |
| Class VI (MRI only) | 10 | 13.9 |