Table 3.
Dose-volume histograms (DVHs) statistics for patients of local-regional recurrence
| GTV-P | GTV-N | CTV1 | CTV2 | |
|---|---|---|---|---|
| Average (range) | Average (range) | Average (range) | Average (range) | |
| Dmax | 76.3 (72.1-78.4) | 73.7 (71.7-76.0) | 74.8 (69.9-78.2) | 62. (59.3-64.1) |
| Dmean | 72.3(67.5-73.5) | 68.6 (67.5-70.6) | 64.3 (61.6-70.2) | 55.7 (53.2-58.1) |
| Dmin | 57.3 (50.8-64.4) | 57.1 (50.1-65.3) | 42.9 (22.6-58.5) | 40.7 (15.8-55.3) |
| V95% | 1.6 (0-5.7) | 0.5 (0-1.9) | 0.9 (0-1.8) | 0.6 (0-2.0) |
| V100% | 92.7 (79.3-98.5) | 94.3 (91.3-99.0) | 95.8(93.0-99.2) | 95.9 (92.4-98.9) |
| V110% | 0.2 (0-0.9) | 0.6 (0-2.6) | 0.9 (0-3.7) | 2.2 (0-5.6) |
GTV-P gross tumor volume of primary tumor, GTV-N gross tumor volume of involved lymph nodes, CTV1 clinical tumor volume of the high-risk region, CTV2 clinical tumor volume of lymph nodal regions at low risk. Dmax = Maximum dose, Dmean = Mean dose, Dmin = Minimum dose. V95% =%volume receiving < 95% of the prescribed dose, V100% =% volume receiving >100% of the prescribed dose, V110% =% volume receiving >110% of the prescribed dose.