SingapOre Lung Cancer Screening Through Integrating CT With Other biomarkErs (SOLSTICE)

This is a single arm screening study. All eligible participants will be subjected to low dose CT (LDCT) screening and biomarker testing. The primary aim of the study is to determine the feasibility of conducting LDCT screening in at-risk populations for lung cancer in Singapore: * For the smoker population, LDCT screening for lung cancer will be implemented in accordance to Academy of Medicine, Singapore screening test guidelines with the aim of investigating the feasibility of instituting lung cancer screening clinical service in Singapore. * For the non-smoker population, LDCT screening for lung cancer will be introduced to systematically collect baseline data to better understand and provide evidence for lung adenocarcinoma in never-smoker phenotype that is unique to East Asia/Singapore. This will help address unmet needs in local population research as reported by Academy of Medicine, Singapore, to validate risk factors and inform future screening guidelines for the at-risk population. Screening results will be reported based on Lung CT Screening Reporting \& Data System (Lung-RADS).