From: Geometric and dosimetric consequences of intra-fractional movement in single isocenter non-coplanar stereotactic radiosurgery
PTV margin
Quantity
Target volume (cc)
RTOG CI
RTOG HI
GI
(V50%PD/V100%PD)
0 mm
Median
0.23
1.46
1.30
5.13
SD
2.30
0.28
0.06
4.66
1 mm
0.53
1.24
1.35
4.13
3.10
0.13
0.07
2.37
2 mm
0.95
1.19
1.33
4.17
3.89
0.12
2.12