官方網頁：
covers lung cancer screenings with low dose computed tomography (also known as "CT scans") if you meet all these conditions:
- You’re between 50-77. 【年齡在50-75歲（Medicare 不是65歲才能開始嗎？不懂）】
- You don’t have signs or symptoms of lung cancer (you're asymptomatic). 【無肺癌症狀（如果有症狀就不免費了？性質由篩查變為診斷了？）】
- You’re either a current smoker or you quit smoking within the last 15 years. 【現在吸煙或者在過去15年曾有吸煙史】
- You have a tobacco smoking history of at least 20 “pack years” (an average of one pack (20 cigarettes) per day for 20 years). 【吸煙史是指每天最少一包（20根）煙吸了至少二十年】
- You get an order from your health care provider. 【醫生讓你檢查】
