Figure 9.

DVHs for PTV: (a) Lesion A; (b) Lesion B; (c) Lesion C; (d) Lesion D. Inserts show the ratio of fractional volume relative to the $4{\mathrm{D}}_{\mathrm{p}=10}$ calculation over the ${\mathrm{D}}_{98}$ and ${\mathrm{D}}_{50}$ interval derived from the $4{\mathrm{D}}_{\mathrm{p}=2}$ histogram for each lesion. All lines are as described for Figure 8.