PHASE II | RapidArc | Helical Tomotherapy | p-value | |||
---|---|---|---|---|---|---|
Median | Min - Max | Median | Min - Max | |||
QVH indexes | VQ=0.95 (%) | 99.7 | 99.4–100.0 | 95.3 | 92.2–96.4 | 0.043 |
VQ=1.05 (%) | 0.2 | 0.0–0.4 | 2.6 | 0.7–6.5 | 0.043 | |
QF (%) | 1.5 | 1.3–1.6 | 1.9 | 1.8–2.3 | 0.043 | |
PTV70+PET | D98% (Gy) | 66.4 | 65.7–67.0 | 66.6 | 66.0–67.0 | n.s. |
D95% (Gy) | 67.3 | 66.8–67.9 | 67.6 | 67.0–67.7 | n.s. | |
D50% (Gy) | 70.3 | 70.1–70.5 | 70.0 | 69.9–70.3 | 0.043 | |
D2% (Gy) | 79.7 | 75.2–81.7 | 79.6 | 75.6–81.7 | n.s. | |
V95% (%) | 97.8 | 96.2–98.8 | 98.1 | 96.8–99.0 | n.s. | |
HI | 0.2 | 0.1–0.2 | 0.2 | 0.1–0.2 | n.s. | |
PTV70 | D98% (Gy) | 66.3 | 65.6–66.5 | 66.4 | 65.9–66.7 | n.s. |
D95% (Gy) | 67.2 | 66.6–67.5 | 67.3 | 66.9–67.5 | n.s. | |
D50% (Gy) | 70.1 | 69.8–70.3 | 69.9 | 69.8–70.1 | 0.042 | |
D2% (Gy) | 73.0 | 72.7–73.4 | 71.6 | 71.3–71.9 | 0.043 | |
V95% (%) | 97.6 | 95.4–98.0 | 97.7 | 96.4–98.5 | n.s. | |
V107% (%) | 0.0 | 0.0–0.1 | 0.0 | 0.0–0.0 | n.s. | |
HI | 0.1 | 0.1–0.1 | 0.1 | 0.1–0.1 | 0.039 | |
PTV56 | D98% (Gy) | 53.6 | 53.2–53.8 | 53.9 | 51.6–54.3 | n.s. |
D95% (Gy) | 54.4 | 54.1–54.5 | 54.6 | 53.6–54.9 | n.s. | |
D50% (Gy) | 56.7 | 56.5–57.2 | 55.9 | 55.7–56.2 | 0.043 | |
D2% (Gy) | 67.5 | 67.0–68.1 | 65.8 | 65.7–67.2 | 0.042 | |
V95% (%) | 98.7 | 98.0–99.2 | 99.0 | 96.1–99.2 | n.s. | |
V107% (%) | 12.0 | 10.1–20.7 | 11.0 | 8.6–14.2 | 0.043 | |
HI | 0.2 | 0.2–0.3 | 0.2 | 0.2–0.3 | n.s. | |
PRV SC | D2% (Gy) | 27.8 | 24.5–29.9 | 26.4 | 24.8–28.5 | n.s. |
PRV BS | D2% (Gy) | 22.5 | 17.2–24.4 | 21.3 | 17.9–23.7 | n.s. |
Ipsilateral parotid | Dmean (Gy) | 26.6 | 24.8–28.9 | 26.8 | 25.0–28.3 | n.s. |
Contralateral parotid | Dmean (Gy) | 21.6 | 19.2–23.9 | 21.0 | 20.4–24.7 | n.s. |
Oral cavity | Dmean (Gy) | 28.5 | 19.4–42.0 | 28.2 | 18.1–44.4 | n.s. |
Oral cavity minus PTV | Dmean (Gy) | 18.3 | 16.6–22.3 | 19.8 | 15.8–27.0 | n.s. |
Lower PCM | Dmean (Gy) | 38.2 | 26.0–47.7 | 37.5 | 24.0–50.9 | n.s. |
Cricophar. muscle | Dmean (Gy) | 23.6 | 14.9–35.2 | 22.5 | 13.8–34.7 | n.s. |
Cervical esophagus | Dmean (Gy) | 15.1 | 12.6–19.7 | 14.2 | 10.0–21.4 | n.s. |
Larynx | Dmean (Gy) | 46.1 | 29.3–54.0 | 49.6 | 24.2–54.7 | n.s. |
Larynx minus PTV | Dmean (Gy) | 21.6 | 17.3–30.5 | 23.2 | 17.3–28.8 | n.s. |
Mandible | D5% (Gy) | 58.5 | 57.0–65.5 | 59.2 | 55.8–68.5 | n.s. |
Conformity index | CI PTV70 | 1.1 | 1.0–1.1 | 1.1 | 1.0–1.1 | n.s. |
CI PTV56 | 1.3 | 1.3–1.5 | 1.3 | 1.2–1.4 | n.s. |