Figure 4.

An example of a patient with pneumonia (yellow arrow) in the left lung. original treatment planning CT image (lung window); (b) treatment planning CT image of the same slice as 4a with the 5 bulk densities applied; (c) treatment planning CT image of the same slice as Figs. 4(a) and (b) where the individual average density is applied to the lung and $0.43\hspace{0.17em}\mathrm{g}/{\text{cm}}^3$ is applied to the ground glass appearance area (yellow arrow); (d) DVH comparing the PTV and lung of the 3 plans.