Taiwan Real-world LDCT Screening Behavior and Outcome Research for High Risk Subjects Based on Health Promotion Administration

"1. Participants belonging to modified Lung RADS category 1 and 2 at baseline screening will undergo the LDCT next year after the discussion with the physicians in charge.~2. Participants with nodules belonging to modified Lung RADS category 3 and 4, growing nodules, or new nodules found on follow-up LDCT scans will undergo repeat CT every 3 to 6 months or be referred for diagnostic workup depending on the size and characteristics of the nodules as the regular clinical practice.~3. Volume doubling time (VDT) will be performed in the special groups with Lung RADS category 3 or 4, but the nodules with solid components ≧ 6mm and \< 9mm. A repeat LDCT scan will be performed around 3 months after the baseline screening.~4. Check total bilirubin, urinary heavy metals,CRP, serum tumor marker, including CEA, alpha-fetal protein, etc.~5. Check pulmonary function test."