The Lung Cancer Online Workshop is a comprehensive, interactive and case-based course. The aim is for participants to acquire and refresh their contouring skills and radiation oncology knowledge on the latest evidence in lung cancer: selective PET/CT/EBUS nodal irritation, guidelines for target and OAR contour strategies, rational and concepts for margin setup (e.g. ITV), postoperative radiation considerations and ongoing clinical research. Participants will contour on a lung cancer patient and improve it according to the most updated pathology, imaging technology advances and clinical evidence supplied by experts.