Figure 3.

Transverse slice of the PBU‐60 phantom with planning target volume (blue) and several blocking structures (green, turquoise, pink) adjusted for increased target coverage in the back region, close to the vertebral column.

Transverse slice of the PBU‐60 phantom with planning target volume (blue) and several blocking structures (green, turquoise, pink) adjusted for increased target coverage in the back region, close to the vertebral column.