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. 2010 Oct 7;37(11):5627–5633. doi: 10.1118/1.3497271

Table 1.

Summary of the lung IMRT plan statistics for the 4D and 3D planning. In this table, V5 are defined as percentage volume that receives 5 Gy or more dose. Conformity index is defined as the ratio of volume of reference isodose (95% isodose) and target volume.

Lung 4D VMAT 3D VMAT
GTV mean dose 58 Gy 58 Gy
GTV dose std 2.5 Gy 2.5 Gy
GTV D90 95.1% 95.0%
Esophagus V5 24% 40%
Heart V5 85% 95%
Conformity index 1.38 1.41