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Digital radiography lacks visual clues of exposure techniques used to obtain radiographs, therefore manufacturers have included exposure indicators ( EI s).  EI s provides feedback about exposure techniques used and evaluating  EI s will yield much needed information about exposure trends used in digital radiography.    Methods  A retrospective explorative quantitative study was conducted at nine randomly selected imaging departments in Gauteng, South Africa. Data pertaining to  EI  was retrospectively collected using quota sampling and compared to manufacturer recommended ( MR ) standards.    Results  A total of 1422  EI s were collected. 50% of these were within the  MR  standard. 27% of  EI  indicated overexposure and 23% indicated underexposure.    Conclusions  Greater evidence of overexposure was noted in the retrospective analysis of the  EI . This pilot study shows the need for further investigation into exposure technique practices in digital radiography and the need for measures to halt the evidenced overexposure.

Retrospective evaluation of exposure indicators: a pilot study of exposure technique in digital radiography