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 9
Comparisons of PTV, OAR, and B-P dosimetric parameters between ARC plan and CRT+IMRT plan
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| | Dosimetric parameters | ARC plan | CRT+IMRT plan | Difference | t value | P value |
| | PTV | | | | | | | Minimum dose/cGy | 4285.12159.09 | 4051.12183.68 | 234.00191.68 | 3.861 | 0.004 | | Maximum dose/cGy | 5348.3061.22 | 5373.66103.43 | -25.36122.01 | -0.657 | 0.527 | | Median dose/cGy) | 5025.606.27 | 5017.789.25 | 7.829.97 | 2.480 | 0.035 | | Conformity index | 0.880.02 | 0.800.03 | 0.080.03 | 8.381 | 0.001 | | Homogeneity index | 0.210.04 | 0.270.05 | -0.050.06 | -2.795 | 0.021 | | V105 (%) | 0.74.84 | 3.485.16 | -2.745.08 | -1.707 | 0.122 | | OAR | | | | | | | Spinal cord Maximum dose | 2383.08353.89 | 3181.48556.33 | -798.40303.74 | -8.312 | 0.001 | | Esophagus | | | | | | | V50 (%) | 17.7914.08 | 14.6813.39 | 4.807.56 | 2.007 | 0.076 | | Maximum dose | 5270.17109.33 | 5205.1596.40 | -341.53120.23 | -0.898 | 0.392 | | Heart | | | | | | | V20 (%) | 20.7821.65 | 20.7621.46 | -6.788.27 | -2.591 | 0.029 | | V30 (%) | 9.8310.15 | 13.1215.14 | -6.469.26 | -2.205 | 0.055 | | V40 (%) | 4.875.24 | 5.325.49 | -1.542.34 | -2.090 | 0.066 | | V45 (%) | 3.593.84 | 3.864.20 | -0.961.81 | -1.676 | 0.128 | | Mean dose | 932.07702.92 | 983.30742.64 | -284.71339.66 | -2.651 | 0.026 | | Normal lung | | | | | | | V5 (%) | 49.596.17 | 46.887.19 | 9.182.45 | 11.829 | 0.001 | | V10 (%) | 35.137.42 | 31.746.64 | 4.854.05 | 3.791 | 0.004 | | V13 (%) | 30.316.38 | 24.714.66 | 4.492.86 | 4.954 | 0.001 | | V20 (%) | 22.224.48 | 17.952.56 | 1.541.52 | 3.185 | 0.011 | | V30 (%) | 8.631.47 | 11.342.11 | -2.492.09 | -3.761 | 0.004 | | Mean dose | 1040.41147.82 | 1001.52127.12 | -29.12286.09 | -0.322 | 0.755 | | B-P | | | | | | | V5(%) | 26.153.14 | 20.492.71 | 5.661.76 | 10.143 | 0.001 | | V10(%) | 16.542.41 | 14.322.43 | 2.231.03 | 6.824 | 0.001 | | V15(%) | 10.971.80 | 11.923.92 | -0.943.24 | -0.920 | 0.382 | | V20(%) | 6.461.43 | 10.043.22 | -3.582.41 | -4.684 | 0.001 | | V25(%) | 3.720.93 | 8.322.76 | -4.602.19 | -6.648 | 0.001 | | V30(%) | 2.130.55 | 5.762.33 | -3.63-1.99 | -5.754 | 0.001 | | V35(%) | 1.220.29 | 3.271.80 | -2.051.65 | -3.921 | 0.004 | | V40(%) | 0.660.14 | 1.721.46 | -1.051.39 | -2.397 | 0.040 | | V45(%) | 0.250.04 | 0.871.03 | -0.621.02 | -2.136 | 0.049 | | V50(%) | 0.000.0 | 0.060.06 | -0.050.05 | 10.143 | 0.007 |
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