Ivan Vollmer1, Marcelo Sánchez1, Ramón Rami-Porta2,3. 1. Centre of Imaging Diagnosis, Radiology Dept, Hospital Clínic, University of Barcelona, Barcelona, Spain. 2. Dept of Thoracic Surgery, Hospital Universitari Mutua Terrassa, University of Barcelona, Barcelona, Spain. 3. Network of Centres for Biomedical Research in Respiratory Diseases (CIBERES) Lung Cancer Group, Barcelona, Spain.