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. 2020 Jul 14;5(5):856–864. doi: 10.1016/j.adro.2020.06.008

Table 4.

Simulation of target volume changes after applying different GTV-to PTV margins

Diameter of spherical lesion GTV-to-PTV margin 0 mm GTV-to-PTV margin 1 mm GTV-to-PTV margin 2 mm GTV-to-PTV margin 3 mm
0.5 cm 0.07 cm3 0.18 cm3 0.38 cm3 0.7 cm3
1 cm 0.52 cm3 0.9 cm3 1.43 cm3 2.21 cm3
1.5 cm 1.76 cm3 2.57 cm3 3.59 cm3 4.85 cm3
2 cm 4.18 cm3 5.57 cm3 7.23 cm3 9.2 cm3

Abbreviations: GTV = gross tumor volume; PTV = planning tumor volume.