Patient Exposure From Diagnostic X-rays

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Abstract
Data from over 12,000 standard X-ray projections were analyzed to determine the effects on patient exposure of the type of medical X-ray facility and the training of the X-ray operator. The data were obtained from the Nationwide Evaluation of X-Ray Trends (NEXT) Program. The data from chest, lumbar-sacral spine and dental bitewing projections were analyzed in detail. Trained X-ray operators give lower exposure and better collimated fields than medical practitioners or nontrained operators. The correlation between tube potential and patient exposure, and the ratio of measured to theoretical output were examined for the 3 projects. The half valve layer of about 90% of the units met present [USA] FDA [Food and Drug Administration] requirements.

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