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Table 1 Dosimetry comparisons of target volumes

From: Using neoadjuvant chemotherapy and replanning intensity-modulated radiotherapy for nasopharyngeal carcinoma with intracranial invasion to protect critical normal tissue

Variable Replanned Not replanned P value Variable Replanned Not replanned P value
PTV GTV-P1 PTV GTV-P2
D-mean (Gy) 71.86 ± 0.88 72.05 ± 0.98 0.000 D-mean (Gy) 72.29 ± 1.11 72.32 ± 1.07 0.394
D-95 (Gy) 67.15 ± 2.30 68.17 ± 1.68 0.000 D-95 (Gy) 69.41 ± 1.38 69.28 ± 1.19 0.276
D-99 (Gy) 63.52 ± 3.59 65.64 ± 2.08 0.000 D-99 (Gy) 67.29 ± 1.62 67.16 ± 1.50 0.463
V95 (%) 96.29 ± 3.07 97.42 ± 2.50 0.000 V95 (%) 99.20 ± 1.52 99.66 ± 2.47 0.208
PTVCTV-H1 PTVCTV-H2
D-mean (Gy) 66.54 ± 1.37 66.70 ± 1.40 0.363 D-mean (Gy) 66.65 ± 1.17 66.82 ± 1.40 0.184
D-95 (Gy) 60.35 ± 1.35 61.26 ± 1.80 0.015 D-95 (Gy) 61.15 ± 1.18 61.43 ± 1.79 0.435
D-99 (Gy) 55.36 ± 3.17 58.20 ± 2.82 0.000 D-99 (Gy) 58.10 ± 2.65 58.54 ± 2.76 0.284
V95 (%) 97.69 ± 1.53 98.89 ± 0.78 0.000 V95 (%) 98.95 ± 1.29 99.13 ± 0.73 0.423