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Table 2 Number of patients exceeding the dose threshold

From: Influence of target dose heterogeneity on dose sparing of normal tissue in peripheral lung tumor stereotactic body radiation therapy

  MLD Lung V20 Rib D2cc R50% R100%
> 4 Gy > 6 Gy > 4% > 10% > 12% > 30.8 Gy > Threshold of RTOG 0915 > Threshold of RTOG 0915
HO plans 12 5 13 3 1 19 22 3
MHE plans 9 1 10 1 0 16 11 0
HE plans 9 1 9 1 0 15 6 0
  1. MLD, mean lung dose; V20, volume that receives above 20 Gy; D2cc, minimum absorbed dose that covers 2 cc of the volume; R50% and R100%, ratio of 50% and 100% prescription isodose volume to the PTV volume; HO, MHE and HE plans, homogeneous, moderate heterogeneous and heterogeneous plans