Figure 2.

Transverse, sagittal and coronal views of the MVCT scan of the “cheese” phantom with two high‐density inserts ($1.335\hspace{0.17em}\mathrm{g}/{\text{cm}}^3$ and $1.824\hspace{0.17em}\mathrm{g}/{\text{cm}}^3$) and two low‐density inserts ($0.46\hspace{0.17em}\mathrm{g}/{\text{cm}}^3$ and $0.29\hspace{0.17em}\mathrm{g}/{\text{cm}}^3$). The two high‐density inserts are delineated in red as the PTV (prescribed to 30 Gy). The two low‐density inserts are delineated in blue as avoidance structures. Isdodose curves (100%, 90%, 70% and 60%) are also shown.