PET/CT in radiotherapy planning in head and neck cancers

18F-FDG-PET-CT has showed its utility in the staging and the definition of the treatment volume in head and neck cancers with radiotherapy (RT) indication. Despite some uncertainties related to resolution and segmentation, PET/CT offers valuable information about tumor heterogeneity and biology. The technological advances in the radiotherapy setting as intensity-modulated RT, image-guided RT in the adaptive protocol and dose escalation are the...