IMRT | 3DCRT | Difference | p-value† | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Parameter | Mean | SD | Mean | SD | Mean | −95CI | +95CI | Timing of RT | Plan | Plan*Timing of RT |
PTV | ||||||||||
HI | 0.97 | 0.03 | 0.96 | 0.04 | −0.01 | −0.027 | 0.003 | 0.46 | 0.10 | 0.40 |
CI | 0.71 | 0.20 | 0.65 | 0.23 | −0.06 | −0.109 | −0.005 | 0.17 | 0.03 | 0.22 |
Combined kidneys | ||||||||||
Mean dose (cGy) | 1428 | 640 | 1322 | 656 | −106 | −256 | 44 | 0.01 | 0.16 | 0.46 |
Maximum Dose (cGy) | 3946 | 1418 | 4272 | 1130 | 325 | 58 | 593 | 0.06 | 0.02 | 0.23 |
V12 | 59.7 | 31.9 | 41.3 | 23.03 | −18.4 | −28.6 | −8.3 | 0.13 | <0.01 | 0.75 |
V20 | 26.8 | 19.4 | 22.3 | 17.7 | −4.5 | −8.63 | −0.41 | 0.11 | 0.04 | 0.89 |
V28 | 10.8 | 12.395 | 13.9 | 14.0 | 3.1 | 0.4 | 5.9 | 0.15 | 0.03 | 0.41 |
Liver | ||||||||||
Mean dose (cGy) | 1593 | 817 | 1427 | 890 | −165 | −261 | −69 | 0.39 | <0.01 | 0.34 |
Maximum Dose (cGy) | 4924 | 945 | 4592 | 1377 | −332 | −723 | 58 | 0.76 | 0.10 | 0.67 |
Small bowel | ||||||||||
Mean dose (cGy) | 4394 | 1686 | 4237 | 1800 | −157 | −556 | 242 | 0.27 | 0.39 | 0.15 |
V15 | 62.2 | 22.5 | 54.9 | 20.9 | −7.3 | −1.0 | −4.6 | 0.67 | <0.01 | 0.19 |
Spinal cord | ||||||||||
Maximum Dose (cGy) | 2940 | 1003 | 2999 | 1208 | 59 | −269 | 386 | 0.83 | 0.72 | 0.89 |