The article provides a comprehensive overview of the current status of lung cancer in Korea, covering epidemiology, screening, diagnosis, and treatment. It explains also the K-LUCAS program, a lung cancer screening program in Korea that has implemented a cloud-based system using computer-aided detection and volumetry software from Coreline Soft. The use of this software has led to an increase in positive cancer findings, but has also reduced variability among screening centers. Overall, the article emphasizes the importance of effective lung cancer screening programs and the potential benefits of using advanced software tools to improve the accuracy and consistency of screening results.