Table 2.
Dosimetric data of hypofractionated helical tomotherapy for whole patients (n=70)
| Dosimetric parameters | Median (range) |
|---|---|
| PTV1 | |
| Mean dose, Gy | 75.7 (75.4–78.6) |
| Maximum dose, Gy | 77.7 (77.2–81.5) |
| Minimum dose, Gy | 73.1 (73.6–75.6) |
| PTV2 | |
| Mean dose, Gy | 67.7 (63.3–70.5) |
| Maximum dose, Gy | 76.0 (68.8–77.8) |
| Minimum dose, Gy | 61.4 (52.3–64.4) |
| PTV3 | |
| Mean dose, Gy | 57.7 (54.8–61.7) |
| Maximum dose, Gy | 69.6 (60.4–79.2) |
| Minimum dose, Gy | 50.4 (46.2–53.1) |
| Rectum | |
| V5, % | 93.8 (65.0–100.0) |
| V10, % | 87.3 (58.0–100.0) |
| V20, % | 74.5 (42.3–98.0) |
| V30, % | 48.6 (24.5–93.2) |
| V40, % | 27.0 (15.0–64.1) |
| V50, % | 15.0 (8.2–28.2) |
| V60, % | 7.9 (4.6–14.3) |
| V70, % | 3.0 (1.0–8.7) |
| V75, % | 1.0 (0.1–5.6) |
| Maximum dose, Gy | 76.5 (75.6–79.7) |
| Bladder | |
| V5, % | 82.2 (18.0–100.0) |
| V10, % | 71.5 (9.3–100.0) |
| V20, % | 57.5 (10.7–99.5) |
| V30, % | 40.5 (7.2–82.5) |
| V40, % | 24.5 (3.0–50.0) |
| V50, % | 14.3 (1.4–40.0) |
| V60, % | 8.0 (0.6–29.1) |
| V70, % | 3.0 (0.1–16.4) |
| V75, % | 1.1 (0–10.5) |
| Maximum dose, Gy | 76.7 (74.9–80.6) |
Abbreviation: PTV, planning target volume.