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Table 2 Dose-volume histogram data for planning target volumes in the 749 patients with NPC

From: Prognostic factors and failure patterns in non-metastatic nasopharyngeal carcinoma after intensity-modulated radiotherapy

Variate Volume (mL) Dmax (Gy) Dmin (Gy) Mean dose (Gy)
PTV-P 51.89 (2.60–287.48) 79.91 (70.47–93.95) 59.79 (50.58–71.16) 73.11 (68.16–78.48)
PTV1 97.35 (13.78–494.77) 79.67 (72.81–86.08) 58.86 (49.13–67.32) 67.94 (56.66–74.48)
PTV2 368.97 (106.36–685.58) 78.99 (70.04–86.74) 45.28 (43.12–61.47) 60.55 (53.64–72.13)
  1. PTV-P planning target volume of the primary tumor, PTV1 PTV of the high-risk clinical target volume, PTV2 PTV of the low-risk clinical target volume, D max maximum dose, D min minimum dose. All data are presented as median with range in parentheses