Phase 2 Study Evaluating Mid-position Strategy in Radiotherapy Treatment for Patients With a Locally Advanced Non-small Cell Lung Carcinoma

The midP strategy defines the target as the time weighted average tumor position (mid-position) plus an additional margin, computed specifically for each patient, that takes into account the tumor motion in each direction. This strategy can help to safely reduce toxicity while preserving treatment efficacy

The ITV strategy is the conventional one. It consists in defining the target as the volume covering the whole tumor motion.