You should be screened if you meet all of the following criteria:
- 50 to 80 years old
- Currently smoke cigarettes or have quit smoking cigarettes in the past 15 years
- Have smoked at least an average of one pack of cigarettes per day for 20 years, referred to as 20 pack years
- Have no current symptoms of lung cancer, such as coughing up blood or sudden, unexplained weight loss