Research Article
The Dosimetric Comparisons of CRT, IMRT, ARC, CRT+IMRT, and CRT+ARC of Postoperative Radiotherapy in IIIA-N2 Stage Non-Small-Cell Lung Cancer Patients
Table 5
Comparisons of PTV, OAR, and B-P dosimetric parameters between IMRT plan and ARC plan
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| | Dosimetric parameters | CRT plan | CRT+ARC plan | Difference | t value | P value |
| | PTV | | | | | | | Minimum dose/cGy | 4353.7169.41 | 4305.23114.48 | 48.48127.34 | 1.204 | 0.259 | | Maximum dose/cGy | 5397.29 82.69 | 5328.3258.00 | 68.97101.56 | 2.148 | 0.060 | | Median dose/cGy) | 5001.5614.33 | 5068.4477.68 | -66.8873.16 | -2.891 | 0.018 | | Conformity index | 0.690.05 | 0.860.02 | -0.180.05 | -12.227 | 0.001 | | Homogeneity index | 0.210.02 | 0.200.03 | 0.000.04 | 0.260 | 0.801 | | V105 (%) | 15.113.64 | 3.759.42 | 11.3619.94 | 1.801 | 0.105 | | OAR | | | | | | | Spinal cord Maximum dose | 3214.23285.34 | 2870.81535.92 | 343.42622.22 | 1.745 | 0.115 | | Esophagus | | | | | | | V50 (%) | 8.499.94 | 17.0212.75 | -8.539.27 | -2.911 | 0.017 | | Maximum dose | 5110.67113.32 | 5229.3479.93 | -118.67125.23 | -2.997 | 0.015 | | Heart | | | | | | | V20 (%) | 23.7721.93 | 20.5621.20 | 3.203.45 | 2.933 | 0.017 | | V30 (%) | 11.9812.97 | 14.3913.89 | -2.412.16 | -3.529 | 0.006 | | V40 (%) | 6.927.43 | 4.884.73 | 2.052.80 | 2.310 | 0.046 | | V45 (%) | 5.155.48 | 2.942.42 | 2.213.18 | 2.196 | 0.056 | | Mean dose | 1061.75777.82 | 872.64788.90 | 189.11256.43 | 2.332 | 0.045 | | Normal lung | | | | | | | V5 (%) | 54.248.06 | 48.779.22 | 5.475.55 | 3.114 | 0.012 | | V10 (%) | 37.288.74 | 28.305.43 | 8.984.48 | 6.330 | 0.001 | | V13 (%) | 33.627.95 | 22.404.28 | 11.225.32 | 6.673 | 0.001 | | V20 (%) | 26.627.23 | 14.742.08 | 11.895.94 | 6.319 | 0.001 | | V30 (%) | 11.591.64 | 10.360.81 | 1.231.56 | 2.494 | 0.034 | | Mean dose | 1006.29522.53 | 952.15120.92 | 54.14452.68 | 0.378 | 0.714 | | B-P | | | | | | | V5(%) | 27.318.42 | 25.2212.40 | 2.1014.42 | 0.460 | 0.656 | | V10(%) | 18.975.53 | 14.866.45 | 4.117.20 | 1.806 | 0.104 | | V15(%) | 16.034.77 | 10.134.22 | 5.915.02 | 3.719 | 0.005 | | V20(%) | 12.494.87 | 7.992.65 | 4.504.37 | 3.261 | 0.010 | | V25(%) | 7.333.41 | 6.831.99 | 0.502.90 | 0.546 | 0.598 | | V30(%) | 4.292.76 | 5.331.80 | -1.033.03 | -1.077 | 0.309 | | V35(%) | 2.942.29 | 3.421.89 | -0.472.97 | -0.501 | 0.628 | | V40(%) | 1.951.32 | 1.581.71 | 0.372.10 | 0.560 | 0.589 | | V45(%) | 1.241.06 | 0.681.19 | 0.571.55 | 1.149 | 0.280 | | V50(%) | 0.230.24 | 0.120.33 | 0.120.39 | 0.933 | 0.375 |
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