Advanced Skills in Modern Radiotherapy 2018

Tumor Gross Volume: GTV

• GTV is defined based on clinical data (inspection, palpation) and imaging (CT, MR, US, PET depending on it’s relevance for the tumor site)

• Definition of the GTV allows for TNM classification of the disease

• Definition of the GTV allows for tumor response assessment

• Adequate dose to GTV is therefore crucial for tumor control