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Table 1 Summary of dose to targets and OARs in water phantom simulation

From: Evaluation of OAR dose sparing and plan robustness of beam-specific PTV in lung cancer IMRT treatment

Parameter General PTV 4-field IMRT plan BSPTV 4-field IMRT plan General PTV ideal dose distribution plan BSPTV ideal dose distribution plan
CTV, D98% 62.5 62.5 61.5 61.0
General PTV, volume (cm3) 65.9 65.9 65.9 65.9
General PTV, D98% (Gy) 60.0 59.9 60.0 59.5
General PTV, D2% (Gy) 64.5 64.6 63.3 63.4
General PTV, CI (%) 85.2 85.1 92.8 91.1
General PTV, HI (%) 3.5 3.6 3.4 3.4
BSPTV, volume (cm3) 62.5 62.5 62.5 62.5
BSPTV, D98% (Gy) 60.1 60.0 60.2 60.0
BSPTV, D2% (Gy) 64.5 64.6 63.3 63.4
BSPTV, CI 82.4 83.3 90.7 91.9
BSPTV, HI 3.5 3.6 3.4 3.4
Ring PTV, Dmean (Gy) 53.1 52.4 53.3 52.6
Ring BSPTV, Dmean (Gy) 53.5 52.9 53.7 53.0
Ring PTV, volume (cm3) 61.2 61.2 61.2 61.2
Ring BSPTV, volume (cm3) 64.6 64.6 64.6 64.6
  1. HI homogeneity index, CI conformity index