AJR. American journal of roentgenology
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AJR Am J Roentgenol · Jul 2013
Multicenter StudyEffective dose assessment for participants in the National Lung Screening Trial undergoing posteroanterior chest radiographic examinations.
The National Lung Screening Trial (NLST) is a multicenter randomized controlled trial comparing low-dose helical CT with chest radiography in the screening of older current and former heavy smokers for early detection of lung cancer. Recruitment was launched in September 2002 and ended in April 2004, when 53,454 participants had been randomized at 33 screening sites. The objective of this study was to determine the effective radiation dose associated with individual chest radiographic screening examinations. ⋯ The effective dose for participant NLST chest radiographic examinations was determined and is of specific interest in relation to that associated with the previously published NLST low-dose CT examinations conducted during the trial.