Table 1.

Data extracted from included studies

Category	Items
Patient characteristics	Number of cases Anatomical sub-sites TNM stages Radiotherapy setting Systemic treatment
Treatment characteristics	Radiotherapy technique Boost technique CTV-PTV margin
IGRT	Number and frequency of image acquisition Use of no-action-levels Primary and complementary/secondary IGRT techniques Immobilization techniques Setup correction
Adaptive re-planning	Workflow for adaptation Triggers for adaptation
Patterns of failure	Diagnostic Modality for PoF PoF correlation with target volumes PoF terminology
Analysis of IGRT factors influencing PoF	Possible associations between IGRT procedure and PoF Plan robustness analysis

CTV: Clinical Target Volume; IGRT: Image-Guided Radiotherapy; PoF: Patterns of Failure; PTV: Planning Target Volume; TNM: TNM Classification of Malignant Tumours