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Table 3 The tumor volume for targets in 40 NPC patients

From: Dosimetric benefit to organs at risk following margin reductions in nasopharyngeal carcinoma treated with intensity-modulated radiation therapy

Target Mean (mL) SD (mL) Range (mL)
GTV 35.44 29.02 1.17–119.70
CTV1 112.04 50.42 21.69–239.26
CTV2 493.20 134.24 75.24–792.59
PTV_7000 Pre-correction 68.20 42.78 4.51–186.32
  Post-correction 54.65 36.02 3.09–161.97
PTV_6000 Pre-correction 166.75 66.79 40.70–333.05
  Post-correction 147.16 61.98 33.99–299.74
PTV_5600 Pre-correction 745.13 155.04 364.14–1,108.09
  Post-correction 650.69 141.54 311.18–988.26
  1. GTV, gross tumor volume; CTV, clinical target volume; PTV_7000, the PTV of gross tumor volume; PTV_6000, the PTV of high-risk regions; PTV_5600, the PTV of low-risk regions; SD, standard deviation.