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The National Lung Screening Trial compared annual low-dose CT with chest radiography in adults at high risk for lung cancer. More than 53,000 participants were enrolled across U.S. centers, making this one of the landmark studies underpinning modern lung-cancer screening. The trial found a reduction in lung-cancer mortality with low-dose CT compared with chest radiography, supporting the principle that detecting disease at an earlier stage can translate into a survival benefit. For clinicians, the important lesson is not simply “screen with CT,” but “screen an appropriate high-risk population using a structured program.” Screening decisions depend on age, smoking exposure, eligibility criteria, follow-up of detected nodules and the ability to manage incidental findings and false positives. This aligns with the NAPCON lung-cancer and imaging themes and is particularly relevant to discussions about expanding access beyond major urban centers. The study remains influential because it demonstrated a mortality endpoint rather than only improved detection. In practice, the benefit of screening depends on appropriate patient selection, quality-assured imaging and access to downstream diagnostic and treatment services.
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The National Lung Screening Trial compared annual low-dose CT with chest radiography in adults at high risk for lung cancer. More than 53,000 participants were enrolled across U.S. centers, making this one of the landmark studies underpinning modern lung-cancer screening. The trial found a reduction in lung-cancer mortality with low-dose CT compared with chest radiography, supporting the principle that detecting disease at an earlier stage can translate into a survival benefit. For clinicians, the important lesson is not simply “screen with CT,” but “screen an appropriate high-risk population using a structured program.” Screening decisions depend on age, smoking exposure, eligibility criteria, follow-up of detected nodules and the ability to manage incidental findings and false positives. This aligns with the NAPCON lung-cancer and imaging themes and is particularly relevant to discussions about expanding access beyond major urban centers. The study remains influential because it demonstrated a mortality endpoint rather than only improved detection. In practice, the benefit of screening depends on appropriate patient selection, quality-assured imaging and access to downstream diagnostic and treatment services.
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