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 11
Comparisons of PTV, OAR, and B-P dosimetric parameters between CRT+IMRT plan and CRT+ARC plan
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| | Dosimetric parameters | CRT+IMRT plan | CRT+ARC plan | Difference | t value | P value |
| | PTV | | | | | | | Minimum dose/cGy | 4051.12183.68 | 4305.23114.48 | -254.11132.76 | -6.053 | 0.001 | | Maximum dose/cGy | 5373.66103.43 | 5328.3258.00 | 45.34115.42 | 1.242 | 0.246 | | Median dose/cGy) | 5017.789.25 | 5068.4477.68 | -50.6674.52 | -2.150 | 0.060 | | Conformity index | 0.800.03 | 0.860.02 | 0.070.03 | -7.334 | 0.001 | | Homogeneity index | 0.270.05 | 0.200.03 | 0.060.03 | 5.364 | 0.001 | | V105 (%) | 3.485.16 | 3.759.42 | -0.2711.52 | -0.074 | 0.943 | | OAR | | | | | | | Spinal cord Maximum dose | 3181.48556.33 | 2870.81535.92 | 310.67262.39 | 3.744 | 0.005 | | Esophagus | | | | | | | V50 (%) | 14.6813.39 | 17.0212.75 | -2.344.33 | -1.709 | 0.122 | | Maximum dose | 5205.1596.40 | 5229.3479.93 | -24.1973.44 | -1.042 | 0.325 | | Heart | | | | | | | V20 (%) | 20.7621.46 | 20.5621.20 | 0.200.53 | 1.178 | 0.269 | | V30 (%) | 13.1215.14 | 14.3913.89 | -1.272.18 | -1.843 | 0.098 | | V40 (%) | 5.325.49 | 4.884.73 | 0.450.88 | 1.617 | 0.140 | | V45 (%) | 3.864.20 | 2.942.42 | 0.921.88 | 1.547 | 0.156 | | Mean dose | 983.30742.64 | 872.64788.90 | 110.66322.92 | 1.084 | 0.307 | | Normal lung | | | | | | | V5 (%) | 46.887.19 | 48.779.22 | -1.885.28 | -1.127 | 0.289 | | V10 (%) | 31.746.64 | 28.305.43 | 3.443.07 | 3.546 | 0.006 | | V13 (%) | 24.714.66 | 22.404.28 | 2.312.17 | 3.376 | 0.008 | | V20 (%) | 17.952.56 | 14.742.08 | 3.221.45 | 7.026 | 0.001 | | V30 (%) | 11.342.11 | 10.360.81 | 0.992.04 | 1.528 | 0.161 | | Mean dose | 1001.52127.12 | 952.15120.92 | 49.3730.51 | 5.117 | 0.001 | | B-P | | | | | | | V5(%) | 20.492.71 | 25.2212.40 | -4.7311.15 | -1.341 | 0.213 | | V10(%) | 14.322.43 | 14.866.45 | -0.545.74 | -0.300 | 0.771 | | V15(%) | 11.923.92 | 10.134.22 | 1.794.96 | 1.143 | 0.283 | | V20(%) | 10.043.22 | 7.992.65 | 2.053.37 | 1.923 | 0.087 | | V25(%) | 8.322.76 | 6.831.99 | 1.492.74 | 1.715 | 0.120 | | V30(%) | 5.762.33 | 5.331.80 | 0.432.47 | 0.553 | 0.594 | | V35(%) | 3.271.80 | 3.421.89 | -0.152.56 | -0.186 | 0.856 | | V40(%) | 1.721.46 | 1.581.71 | 0.132.19 | 0.195 | 0.850 | | V45(%) | 0.871.03 | 0.681.19 | 0.191.57 | 0.393 | 0.703 | | V50(%) | 0.060.06 | 0.120.33 | -0.060.32 | -0.553 | 0.594 |
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