Table 2 Summary of the DVH analysis for the CTV, PTV and OARs for the entire cohort of patients
From: Radiation therapy of anal canal cancer: from conformal therapy to volumetric modulated arc therapy
Parameter | CRT | RA | ||
|---|---|---|---|---|
CTV | PTV | CTV | PTV | |
Mean (Gy) | 49.3 ± 1.3 | 48.8 ± 1.0 | 50.9 ± 0.7 | 50.2 ± 0.5 |
D 1% (Gy) | 60.8 ± 1.2 | 60.4 ± 1.1 | 59.7 ± 0.6 | 54.4 ± 1.4 |
D 99% (Gy) | 44.4 ± 0.6 | 43.4 ± 1.0 | 48.4 ± 0.6 | 46.9 ± 0.8 |
CTV_Boost | PTV_Boost | CTV_Boost | PTV_Boost | |
Mean (Gy) | 60.4 ± 1.1 | 60.2 ± 1.0 | 59.5 ± 0.3 | 59.3 ± 0.3 |
D 1% (Gy) | 61.3 ± 1.3 | 61.5 ± 1.3 | 60.6 ± 0.4 | 61.0 ± 0.4 |
D 99% (Gy) | 58.9 ± 0.8 | 57.9 ± 1.4 | 57.8 ± 1.6 | 55.5 ± 4.8 |
Bladder | ||||
Mean (Gy) | 47.2 ± 5.6 (p = 0.02) | 34.2 ± 6.6 | ||
V 40 Gy (%) | 86.4 ± 25.4 (p < 0.001) | 33.8 ± 18.2 | ||
Bowel | ||||
Mean (Gy) | 30.8 ± 9.1 | 26.5 ± 6.8 | ||
V 40 Gy (%) | 41.4 ± 27.7 (p = 0.04) | 22.9 ± 9.0 | ||
Femoral heads | ||||
D 1% (Gy) | 51.4 ± 7.2 | 43.8 ± 2.6 | ||
Genitals | ||||
V 40 Gy (%) | 42.6 ± 24.8 (p < 0.01) | 22.1 ± 10.3 | ||
Healthy tissue | ||||
Mean (Gy) | 18.9 ± 4.4 (p = 0.01) | 11.9 ± 1.6 | ||
V 10 Gy (%) | 53.6 ± 11.9 (p = 0.03) | 41.4 ± 6.1 | ||