There are slight differences with the protocol in how we apply the acceptability criteria. For the protocol, the first line in the table is automatically fulfilled if the plan is normalized as specified. We normalize out plans to cover 100% of the GTV with 100% of the prescription dose. Although this approach typically produces sufficient PTV coverage, compliance with the protocol had to be tested. The 0.03 cm3 cold spot was first evaluated for the entire PTV_70. If failed, it was examined for the lesser volume as specified in the protocol, namely disregarding the PTV voxels residing closer than 8 mm from the skin.