Both computed radiography (CR) and digital radiography (DR)
technology are in use at the 3 hospital sites. The exposure index
(EI)11 was identified from images and assessed against normal
ranges provided by the manufacturer (Agfa CR 1800-2200; Carestream
DR 1400-1600). Those lying outside of these ranges were
categorized as under- or over-exposed. To evaluate whether radiographers
were making conscious decisions regarding radiographic
exposure when the request was for NG tube position check, the
radiographs where the NG tube was an incidental finding were
then available as a control group. Paediatric referrals (