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Table 1 Probability of not covering the entire GTV (%)

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%

0%

3.6%

4%