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Summary of the pancreas IMRT plan statistics for the 4D and 3D planning. In this table, V20 is defined as percentage volume that receives 20 Gy or more dose. Conformity index is defined as the ratio of volume of reference isodose (95% isodose) and target volume.
| Pancreas | 4D VMAT | 3D VMAT |
|---|---|---|
| GTV mean dose | 60 Gy | 62 Gy |
| GTV dose std | 2.9 Gy | 2.9 Gy |
| GTV D90 | 98.0% | 98.0% |
| Stomach V20 | 28% | 31% |
| Duodenum V20 | 20% | 41% |
| Conformity index | 1.24 | 1.37 |
