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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%