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1	Public health implications of medical diagnostic radiation exposure Gerstenmaier, Jan Frank 02 1900 (has links) Radiation from Computed Tomography (CT) is now the major contributor to population radiation dose. Despite controversy around the dose-effect relationship of radiation from CT, the linear non-threshold (LNT) theory is endorsed by many authorities, and constitutes the basis of cancer risk estimates. The purpose of this study was (1) a literature review of radiobiological theories, and methods of dose saving stategies in CT; (2) to highlight the importance of dose saving in CT, and to demonstrate how dose can be saved in a radiology department: Following a 40% reduction in reference X-ray tube current for a CT of the urinary tract, the effecitve dose and estimated lifetime attributable risk of incident cancer due to this CT in a group (n=103) were reduced by 37% and 38% in an age and sex-matched group respectively. The literature review showed that the public health implications of CT radiation exposure remain uncertain. / Health Studies / M.A. (Public Health) Computed tomography Llinear non-threshold theory Radiation hormesis Cancer risk estimation X-ray tube current reduction Radiation and cancer Radiation in medical diagnostic imaging Models of radiobiology Dose saving strategies 616.994064 Radiation dosimetry Radiography, Medical -- Safety measures Radiography, Medical -- Exposure Cancer -- Radiotherapy Cancer -- Tomography