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 8
Comparisons of PTV, OAR, and B-P dosimetric parameters between IMRT plan and CRT+ARC plan
.
| | Dosimetric parameters | IMRT plan | CRT+ARC plan | Difference | t value | P value |
| | PTV | | | | | | | Minimum dose/cGy | 3936.34189.77 | 4305.23114.48 | -368.89179.22 | -6.509 | 0.001 | | Maximum dose/cGy | 5350.0861.15 | 5328.3258.00 | 21.7662.08 | 1.108 | 0.296 | | Median dose/cGy) | 4979.0877.62 | 5068.4477.68 | -89.36127.30 | -2.220 | 0.054 | | Conformity index | 0.800.04 | 0.860.02 | -0.070.05 | -4.763 | 0.001 | | Homogeneity index | 0.280.04 | 0.200.03 | 0.080.04 | 6.611 | 0.001 | | V105 (%) | 2.924.38 | 3.759.42 | 0.8311.02 | -0.238 | 0.817 | | OAR | | | | | | | Spinal cord Maximum dose | 2636.20179.98 | 2870.81535.92 | -234.60564.83 | -3.257 | 0.222 | | Esophagus | | | | | | | V50 (%) | 17.7914.08 | 17.0212.75 | 0.7611.38 | 0.835 | 0.836 | | Maximum dose | 5270.17109.33 | 5229.3479.93 | 40.83113.85 | 1.973 | 0.286 | | Heart | | | | | | | V20 (%) | 20.7821.65 | 20.5621.20 | 0.222.86 | 0.029 | 0.810 | | V30 (%) | 9.8310.15 | 14.3913.89 | -4.563.99 | -1.936 | 0.006 | | V40 (%) | 4.875.24 | 4.884.73 | -0.010.75 | -2.826 | 0.967 | | V45 (%) | 3.593.84 | 2.942.42 | 0.651.51 | -1.993 | 0.205 | | Mean dose | 932.07702.92 | 872.64788.90 | 59.43263.06 | -1.929 | 0.493 | | Normal lung | | | | | | | V5 (%) | 49.596.17 | 48.779.22 | 0.835.61 | 2.325 | 0.652 | | V10 (%) | 35.137.42 | 28.305.43 | 6.843.23 | 2.635 | 0.001 | | V13 (%) | 30.316.38 | 22.404.28 | 7.924.03 | 4.569 | 0.001 | | V20 (%) | 22.224.48 | 14.742.08 | 7.484.17 | 3.806 | 0.001 | | V30 (%) | 8.631.47 | 10.360.81 | -1.721.50 | -3.661 | 0.006 | | Mean dose | 1040.41147.82 | 952.15120.92 | 88.2669.44 | 2.153 | 0.003 | | B-P | | | | | | | V5(%) | 22.912.48 | 25.2212.40 | -2.3012.04 | 4.936 | 0.562 | | V10(%) | 15.732.21 | 14.866.45 | 0.875.46 | 5.371 | 0.626 | | V15(%) | 12.551.83 | 10.134.22 | 2.423.23 | 0.616 | 0.042 | | V20(%) | 9.291.79 | 7.992.65 | 1.311.54 | -0.794 | 0.025 | | V25(%) | 5.191.40 | 6.831.99 | -1.631.09 | -3.705 | 0.001 | | V30(%) | 2.730.81 | 5.331.80 | -2.601.21 | -4.924 | 0.001 | | V35(%) | 1.510.46 | 3.421.89 | -1.911.63 | -3.716 | 0.005 | | V40(%) | 0.710.20 | 1.581.71 | -0.871.56 | -2.322 | 0.112 | | V45(%) | 0.280.10 | 0.681.19 | -0.381.12 | -1.857 | 0.302 | | V50(%) | 0.030.03 | 0.120.33 | -0.080.31 | -2.369 | 0.426 |
|
|
