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美国国立癌症研究院(NationalCancerInstitute,NCI)和美国癌症协会(AmericanCancerSociety,ACS)自2002年9月开始的全国性肺筛查试验(NationalLungScreeningTrial,NLST)完成入组吸烟者或既往吸烟者5万人。胸部X线和螺旋CT分别于上世纪70和90年代开始应用于高危人群的肺癌筛查,但
The National Cancer Research Institute (NCI) and the American Cancer Society (ACS) have completed 10,000 smokers or former smokers in the National Lung Screening Trial (NLST) since September 2002. Chest X-ray and spiral CT were applied to lung cancer screening in high-risk groups in the 70s and 90s of the last century, but