Table 3 Dose-volume parameters for 3D-RT and VMAT plans.
Dmean (Gy) | Dmax (Gy) | V5 (ccm) | V10 (ccm) | V15 (ccm) | V20 (ccm) | V25 (ccm) | V30 (ccm) | V35 (ccm) | V40 (ccm) | V45 (ccm) | V50 (ccm) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bladder (mean volume 288.2 ccm) | ||||||||||||
3D-RT | 26.3 | 51.0 | ||||||||||
VMAT | 21.9 | 51.7 | ||||||||||
p-value | < 0.01 | < 0.01 | ||||||||||
Bladder wall (mean volume 111.1 ccm) | ||||||||||||
3D-RT | 27.5 | 50.1 | ||||||||||
VMAT | 24.5 | 51.7 | ||||||||||
p-value | < 0.01 | < 0.01 | ||||||||||
Small bowel (mean volume 759.0 ccm) | ||||||||||||
3D-RT | 11.3 | 49.0 | 522.3 | 344.0 | 128.9 | 86.9 | 74.3 | 63.5 | 52.0 | 42.9 | 34.1 | 10.6 |
VMAT | 7.6 | 50.1 | 366.3 | 150.7 | 87.4 | 61.8 | 46.8 | 37.7 | 31.9 | 27.4 | 22.6 | 11.5 |
p-value | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | 0.57 |
Sphincter (mean volume 15.5 ccm) | ||||||||||||
3D-RT | 35.6 | 46.8 | 13.8 | 11.9 | 11.5 | 11.2 | 10.9 | 10.7 | 10.4 | 10.1 | 9.3 | 4.7 |
VMAT | 34.6 | 46.3 | 13.6 | 11.9 | 11.3 | 11.1 | 10.7 | 10.3 | 10.0 | 9.4 | 8.8 | 4.8 |
p-value | < 0.01 | 0.10 | 0.13 | 0.86 | 0.10 | 0.01 | 0.09 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | 0.83 |
Femoral head right (mean volume 172.2 ccm) | ||||||||||||
3D-RT | 25.9 | 46.6 | 140.1 | 129.4 | 123.3 | 119.6 | 110.7 | 93.6 | 68.9 | 18.2 | 1.0 | 0.1 |
VMAT | 11.4 | 34.8 | 130.0 | 84.8 | 48.5 | 23.4 | 10.4 | 2.9 | 0.7 | 0.1 | 0.0 | 0.0 |
p-value | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | 0.11 |
Femoral head left (mean volume 170.5 ccm) | ||||||||||||
3D-RT | 26.5 | 46.3 | 141.9 | 131.4 | 125.1 | 121.6 | 114.3 | 98.8 | 72.9 | 17.3 | 0.8 | 0.0 |
VMAT | 12.5 | 36.5 | 132.2 | 89.6 | 56.9 | 29.1 | 11.1 | 4.0 | 1.2 | 0.2 | 0.0 | 0.0 |
p-value | < 0.01 | < 0.01 | 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | < 0.01 | 0.32 |
