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 4
Comparisons of PTV, OAR, and B-P dosimetric parameters between CRT plan and CRT+IMRT plan
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| | Dosimetric parameters | CRT plan | CRT+IMRT plan | Difference | t value | P value |
| | PTV | | | | | | | Minimum dose/cGy | 4353.7169.41 | 4051.12183.68 | 302.5962.84 | 4.815 | 0.001 | | Maximum dose/cGy | 5397.29 82.69 | 5373.66103.43 | 23.6350.75 | 0.466 | 0.653 | | Median dose/cGy) | 5001.5614.33 | 5017.789.25 | -16.226.23 | -2.604 | 0.029 | | Conformity index | 0.690.05 | 0.800.03 | -0.110.04 | -7.910 | 0.001 | | Homogeneity index | 0.210.02 | 0.270.05 | -0.060.06 | -3.006 | 0.015 | | V105 (%) | 15.113.64 | 3.485.16 | 11.6319.11 | 1.924 | 0.086 | | OAR | | | | | | | Spinal cord Maximum dose | 3214.23285.34 | 3181.48556.33 | 32.75188.93 | 0.173 | 0.866 | | Esophagus | | | | | | | V50 (%) | 8.499.94 | 14.6813.39 | -6.1910.77 | -1.817 | 0.103 | | Maximum dose | 5110.67113.32 | 5205.1596.40 | -94.48109.08 | -2.739 | 0.023 | | Heart | | | | | | | V20 (%) | 23.7721.93 | 20.7621.46 | 3.003.26 | 2.913 | 0.017 | | V30 (%) | 11.9812.97 | 13.1215.14 | -1.142.68 | -1.347 | 0.211 | | V40 (%) | 6.927.43 | 5.325.49 | 1.602.11 | 2.391 | 0.041 | | V45 (%) | 5.155.48 | 3.864.20 | 1.291.36 | 2.996 | 0.015 | | Mean dose | 1061.75777.82 | 983.30742.64 | 78.4583.12 | 2.985 | 0.015 | | Normal lung | | | | | | | V5 (%) | 54.248.06 | 46.887.19 | 7.354.28 | 5.435 | 0.001 | | V10 (%) | 37.288.74 | 31.746.64 | 5.545.24 | 3.342 | 0.009 | | V13 (%) | 33.627.95 | 24.714.66 | 8.905.54 | 5.082 | 0.001 | | V20 (%) | 26.627.23 | 17.952.56 | 8.675.32 | 5.153 | 0.001 | | V30 (%) | 11.591.64 | 11.342.11 | 0.241.68 | 0.457 | 0.659 | | Mean dose | 1006.29522.53 | 1001.52127.12 | 4.77447.35 | 0.034 | 0.974 | | B-P | | | | | | | V5(%) | 27.318.42 | 20.492.71 | 6.837.07 | 3.053 | 0.014 | | V10(%) | 18.975.53 | 14.322.43 | 4.653.90 | 3.780 | 0.004 | | V15(%) | 16.034.77 | 11.923.92 | 4.111.13 | 11.481 | 0.001 | | V20(%) | 12.494.87 | 10.043.22 | 2.451.81 | 4.287 | 0.002 | | V25(%) | 7.333.41 | 8.322.76 | -0.981.56 | -1.992 | 0.078 | | V30(%) | 4.292.76 | 5.762.33 | -1.471.16 | -3.967 | 0.003 | | V35(%) | 2.942.29 | 3.271.80 | -0.320.78 | -1.282 | 0.232 | | V40(%) | 1.951.32 | 1.721.46 | 0.240.24 | 3.209 | 0.011 | | V45(%) | 1.241.06 | 0.871.03 | 0.370.12 | 9.582 | 0.001 | | V50(%) | 0.230.24 | 0.060.06 | 0.170.20 | 2.730 | 0.023 |
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