Inclusion Criteria:

1. Stage T1,T2,T3N0M0 NSCLC, histological confirmation either by biopsy or cytology

2. Maximal tumor diameter of 6 cm

3. Only T3 lesions based upon thoracic wall involvement

4. Informed consent is required

5. Life expectancy of at least 6 months

6. Age > 18 y.

7. Karnofsky score ≥ 70 or ECOG score ≤ 1

8. Inoperable patients or patients refusing surgery

9. Patients with measurable lesion (according to RECIST criteria)

Exclusion Criteria:

1. Diagnosis of small cell lung cancer

2. Lymph node involvement

3. Prior radiotherapy or chemotherapy for lung cancer

4. Pregnant or lactating women

5. Known allergy for CT contrast

6. No FDG-PET

7. Mental condition rendering the patient unable to understand the nature, scope, and
possible consequences of the study.

8. Patient unlikely to comply with protocol, i.e., uncooperative attitude, inability to
return for follow-up visits, extreme degradation of lung function tests and patients
not likely to complete the study.