Figure 2From: A retrospective, deformable registration analysis of the impact of PET-CT planning on patterns of failure in stereotactic body radiation therapy for recurrent head and neck cancerDistribution of failure outcomes. 47 out of 96 (49%) patients receiving SBRT for rSCCHN had treatment failures in one or more categories. Distribution of failure events was In-field–7 (12·3%), Overlap–14 (24.6%), Marginal–21 (36.8%), Regional/Distant–15 (26.3%).Back to article page