From: Adequacy of inhale/exhale breathhold CT based ITV margins and image-guided registration for free-breathing pancreas and liver SBRT
Method
RL
AP
SI
Total
Registration using skeletal landmarks alone
69%
4.6%
39%
82%
Strategy I (PTV = ITV + 3 mm)
32%
0.3%
20%
46%
Strategy II (PTV = GTV + 1.5 cm)
0%
3.6%
4%