Research Article
Parotid Gland Stem Cell Preservation during Intensity-Modulated Radiotherapy for Nasopharyngeal Carcinoma: Dosimetric Analysis and Feasibility
Table 3
Comparison of irradiation dose in planning target volume between two intensity-modulated radiotherapy plans.
| | Target volume | Regular group (n = 35) | Restricted group (n = 45) | t | |
| | PTVnx | | | | | | Dmean (Gy) | 72.03 ± 2.22 | 72.26 ± 2.86 | 0.3924 | 0.6958 | | V95 (%) | 99.67 ± 0.16 | 99.66 ± 0.09 | 0.3536 | 0.7246 | | V100 (%) | 95.41 ± 1.32 | 94.98 ± 1.23 | 1.5022 | 0.1371 | | V105 (%) | 15.40 ± 4.25 | 15.78 ± 4.34 | 0.3920 | 0.6961 |
| | PTV1 | | | | | | Dmean (Gy) | 68.78 ± 4.90 | 68.18 ± 5.20 | 0.5249 | 0.6011 | | V95 (%) | 97.51 ± 1.05 | 97.05 ± 1.35 | 1.6617 | 0.1006 | | V100 (%) | 94.04 ± 3.69 | 93.91 ± 3.49 | 0.1612 | 0.8724 | | V105 (%) | 65.85 ± 7.37 | 66.47 ± 9.15 | 0.3267 | 0.7448 |
| | PTV2 | | | | | | Dmean (Gy) | 60.21 ± 2.01 | 59.96 ± 2.12 | 0.4648 | 0.6434 | | V95 (%) | 96.78 ± 1.18 | 96.25 ± 1.03 | 1.4659 | 0.1467 | | V100 (%) | 92.21 ± 3.05 | 91.97 ± 2.99 | 0.6202 | 0.5369 | | V105 (%) | 52.87 ± 5.22 | 53.06 ± 5.54 | 0.2264 | 0.8214 |
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