Inclusion Criteria:  Participants ≥ 18 years of age Participants with primary, secondary or metastatic lung cancer with an indication for radiotherapy and placement of a fiducial marker Participants who will be able to tolerate the flexible bronchoscopic implantation procedure and radiotherapy treatment. Participants who give their written informed consent  Exclusion Criteria:  Participants with uncontrolled infection / participants with active infections. Participants with a bronchoscopy contra-indication Pregnant or breast-feeding women Participants with known allergy to one of the components (tantalum and nickel titanium alloy for the marker and polymer materials which are contained in the delivery device)