Randell Kruger, PhD, DABR, Diagnostic Medical Physicist, Marshfield Clinic Health System (MCHS), System Radiology, attended the 2017 American Association of Physicists in Medicine (AAPM) Spring Clinical Meeting in New Orleans, LA, March 18 - 21, 2017 where he presented a poster titled "A Dose Assessment Summary for Participants in the National Lung Screening Trial Receiving PA Chest X-Ray and Low-Dose CT Examinations."  The companion paper, "Body Size-Specific Organ and Effective Doses of Chest CT Screening Examinations of the National Lung Screening Trial" was published in the May 2017 volume of the American Journal of Radiology.  The link to the journal abstract is: http://www.ajronline.org/doi/abs/10.2214/AJR.16.16979.

The National Lung Screening Trial (NLST) is a multicenter randomized controlled trial that compared two ways of detecting lung cancer, low-dose helical computed tomography (CT) and standard chest X-ray, in older patients who were current or former heavy smokers.  The study revealed that participants who received low-dose helical CT scans had a 15-20 percent lower risk of dying from lung cancer than participants who received standard chest X-rays.  Bob Greenlee, PhD, MPH is the current site Principal Investigator for the study.