Modeling of the Response to Hypofractionated Stereotactic Pulmonary Irradiation

Inclusion Criteria: * Age\> 18 years * Performance Index WHO (World Health Organization) ≤ 2 * Bronchopulmonary carcinoma not in small cells proved histologically or cytologically (epidermoid, adenocarcinoma, or large cell carcinoma). * Tumor classified T1 - T2 (Tumor=1-2) N0 (Node=0) M0 (Metastasis=0) and diameter ≤ 5 cm or Tumor classified T3 (≤5cm) N0M0 of the chest wall * Tumor located more than 2 cm from the trachea and bronchus stem and more than 1.5 cm from the organs at risk * Medically inoperable or refusing surgery * Indication of stereotactic radiotherapy validated in multidisciplinary consultation meeting * Formulation of consent Exclusion Criteria: * Age \<18 years. * History of pulmonary irradiation * Pulmonary surgery of the tumor * Different histology of non-small cell carcinoma * Patient with a T2 or T3\> 5 cm tumor or patients with a T3 tumor invading a structure other than the chest wall * Patient with a tumor within 2 cm of the trachea and bronchus stem and within 1.5 cm of the organs at risk in the proximal area of the no fly zone (defined as a volume Located 2 cm in all directions of the proximal bronchial tree - Pulmonary metastases * Declared pregnancy, breast-feeding * Refusal to use effective contraception * Against indication to the realization of the PET to the 18FDG (18-fluorodeoxyglucose)(uncontrolled diabetes) * Refusal or inability to consent to participate in the study. * Estimated life expectancy \<2 months in the absence of treatment * Other invasive tumors diagnosed in the previous 2 years, with the exception of non-melanocytic cutaneous carcinomas.