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Canadian Respiratory Journal
Volume 11, Issue 3, Pages 217-218

Helical Computed Tomography Has a Role in the Screening of Lung Cancer -- The Con Argument

Warren Davidson

Division of Respirology, University of British Columbia, Vancouver, British Columbia, Canada

Copyright © 2004 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Screening constitutes the use of laboratory tests, physical examinations or imaging modalities performed on asymptomatic patients with the intent of identifying subclinical disease (1). As a result, screening differs from clinical investigation, in which tests are ordered after disease is suspected. A cancer screening program is a service in which everyone in a given population is (or has the opportunity to be) examined for the presence or precursor of a type of cancer. If the screening test finds that there is a likelihood of disease, a diagnostic test may be performed for confirmation (1).