In the wake of recent progress in computed tomography (CT) enabling to obtain high quality images within five minutes, CT scan has been widely used in emergency diagnostic radiology and is considered best suited for detection of pathologies, as well as assessing the location and extent of lesions in the emergency department.Emergency physicians often require confirmation of surface bruises or wounds coexisting with pathology on CT scan. Alternatively, they may want to confirm the presence or absence of pathology in the painful lesion. The use of an appropriate surface marker on the skin surface of the painful lesion may enable them to identify areas of interest and safely reduce radiation exposure.
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