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Table 4 The dose of radiation brain stem injury in 8 patient

From: A retrospective dosimetry study of intensity-modulated radiotherapy for nasopharyngeal carcinoma: radiation-induced brainstem injury and dose-volume analysis

patient GTVnx D1% Dmean Dmax D0.1cc D1cc Di
D2% BEDD2% D98% BEDD98%
1 77.69 94.16 72.10 87.39 64.35 49.64 68.47 65.60 62.11 61.30
2 78.60 95.26 75.01 90.91 65.20 38.04 71.59 66.96 61.46 68.60
3 82.32 99.77 73.52 89.11 65.10 44.99 69.72 65.93 59.03 64.30
4 80.66 97.76 71.23 86.33 66.44 31.75 74.07 68.64 59.25 68.20
5 73.49 89.07 68.90 83.51 60.15 36.43 63.38 60.89 56.57 58.10
6 81.79 99.13 72.70 88.11 63.73 32.40 69.41 65.79 60.00 61.73
7 78.80 95.51 72.06 87.34 61.80 36.66 67.87 63.60 54.60 60.00
8 77.32 93.71 75.25 91.20 50.94 24.85 55.30 52.47 47.77 51.71
  1. D2% near the maximum absorbed dose of GTVnx, D98% near the minimum absorbed dose of GTVnx, D1% the dose of 1% brainstem volume, Dmean the mean dose of brainstem, Dmax the maximum point dose of brainstem, D0.1cc the maximum dose of brainstem delivered to a volume of 0.1 ml, D1cc the maximum dose of brainstem delivered to a volume of 1.0 ml, Di injury lesion dose of brainstem, GTVnx Gross tumor volume of nasopharyngeal primary lesions and their direct extensions
  2. Abbreviation: GTV Gross tumor volume, BED Biological effective dose