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Table 1 Target volumes and OAR volumes for FB and DIBH CT techniques (cm 3 )

From: Reduced lung dose during radiotherapy for thoracic esophageal carcinoma: VMAT combined with active breathing control for moderate DIBH

Volume FB (cm3) DIBH (cm3) T p
  GTV 52.58 ± 19.72 46.40 ± 20.78 0.610 0.552
  PTV 396.11 ± 72.43 270.91 ± 87.02 2.259 0.040
  Total lung 4039.40 ± 79.86 6161.60 ±80.85 -5.282 0.000
  Heart 621.08 ± 66.84 497.80 ± 86.58 3.188 0.007
  1. GTV Gross tumor volume, PTV Planning target volume.