Figure 3.

Plots A, B and C showing reduction plan variability in plans produced after the models compared for V5, V20 and MLD respectively. The original plans were planned without model predicted values whereas, achieved values were obtained by re-optimizing plans with the model predicted values. Three separate models were produced for each dose-volume parameter shown in Figure 2, using residual lung volume. The minimum achievable dose-volume parameters were predicted prior to the plan optimisation and the predicted values for each parameter were entered in optimiser.