Table 2.
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) | |
| Volume (cc) |
88.5 (35–140.3) |
85 (34.2–167) |
298.6 (117.8–530.8) |
124 (27.1–228.1) |
| Dmax (Gy) |
75.5 (71.7–77.6) |
73.2 (71.2–75.3) |
75.2 (70.4–77.6) |
61.7 (58.9–63.9) |
| Dmean (Gy) |
71.5 (68–72.9) |
68.7 (68–69.9) |
65.9 (62.1–69.2) |
56.7 (55.5–57.5) |
| Dmin (Gy) |
59.9 (52.7–65.4) |
58.8 (48.4–64.2) |
43.4 (17.5–54.5) |
43.3 (7-51) |
| V95% |
1.7 (0–6.3) |
0.3 (0–1.5) |
0.7 (0.2–2.1) |
0.4 (0–1.4) |
| V100% |
91.3 (77.3–98.9) |
95.6 (90.9–98.9) |
96.5(92.1–99.1) |
96.6 (93.9–99.5) |
| V110% | 0.06 (0–1.1) | 0.7 (0–3.8) | 44 (2.1–76) | 5.7 (0–14.5) |
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.