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 7
Comparisons of PTV, OAR, and B-P dosimetric parameters between IMRT plan and CRT+IMRT plan
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| | Dosimetric parameters | IMRT plan | CRT+IMRT plan | Difference | t value | P value |
| | PTV | | | | | | | Minimum dose/cGy | 3936.34189.77 | 4051.12183.68 | -114.78178.63 | -2.032 | 0.073 | | Maximum dose/cGy | 5350.0861.15 | 5373.66103.43 | -23.58112.33 | -0.664 | 0.523 | | Median dose/cGy) | 4979.0877.62 | 5017.789.25 | -38.7079.38 | -1.542 | 0.158 | | Conformity index | 0.800.04 | 0.800.03 | 0.000.05 | 0.060 | 0.954 | | Homogeneity index | 0.280.04 | 0.270.05 | 0.010.05 | 1.127 | 0.289 | | V105 (%) | 2.924.38 | 3.485.16 | -0.566.53 | -0.271 | 0.792 | | OAR | | | | | | | Spinal cord Maximum dose | 2636.20179.98 | 3181.48556.33 | -545.27529.43 | -3.257 | 0.010 | | Esophagus | | | | | | | V50 (%) | 17.7914.08 | 14.6813.39 | 3.1111.78 | 0.835 | 0.425 | | Maximum dose | 5270.17109.33 | 5205.1596.40 | 65.02104.19 | 1.973 | 0.080 | | Heart | | | | | | | V20 (%) | 20.7821.65 | 20.7621.46 | 0.022.75 | 0.029 | 0.978 | | V30 (%) | 9.8310.15 | 13.1215.14 | -3.295.38 | -1.936 | 0.085 | | V40 (%) | 4.875.24 | 5.325.49 | -0.450.51 | -2.826 | 0.020 | | V45 (%) | 3.593.84 | 3.864.20 | -0.260.42 | -1.993 | 0.077 | | Mean dose | 932.07702.92 | 983.30742.64 | -51.2383.99 | -1.929 | 0.086 | | Normal lung | | | | | | | V5 (%) | 49.596.17 | 46.887.19 | 2.713.68 | 2.325 | 0.045 | | V10 (%) | 35.137.42 | 31.746.64 | 3.394.07 | 2.635 | 0.027 | | V13 (%) | 30.316.38 | 24.714.66 | 5.613.88 | 4.569 | 0.001 | | V20 (%) | 22.224.48 | 17.952.56 | 4.273.55 | 3.806 | 0.004 | | V30 (%) | 8.631.47 | 11.342.11 | -2.712.34 | -3.661 | 0.005 | | Mean dose | 1040.41147.82 | 1001.52127.12 | 38.8957.13 | 2.153 | 0.060 | | B-P | | | | | | | V5(%) | 22.912.48 | 20.492.71 | 2.431.56 | 4.936 | 0.001 | | V10(%) | 15.732.21 | 14.322.43 | 1.420.83 | 5.371 | 0.001 | | V15(%) | 12.551.83 | 11.923.92 | 0.633.23 | 0.616 | 0.553 | | V20(%) | 9.291.79 | 10.043.22 | -0.742.96 | -0.794 | 0.448 | | V25(%) | 5.191.40 | 8.322.76 | -3.122.66 | -3.705 | 0.005 | | V30(%) | 2.730.81 | 5.762.33 | -3.031.94 | -4.924 | 0.001 | | V35(%) | 1.510.46 | 3.271.80 | -1.761.50 | -3.716 | 0.005 | | V40(%) | 0.710.20 | 1.721.46 | -1.001.36 | -2.322 | 0.045 | | V45(%) | 0.280.10 | 0.871.03 | -0.580.99 | -1.857 | 0.046 | | V50(%) | 0.030.03 | 0.060.06 | 0.030.03 | -2.369 | 0.042 |
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