Fig. 3.

Pelvic radiograph shows lateral compression injuries. A laterally directed force causes inward rotation of the left hemipelvis with left superior and inferior pubic rami fractures (white arrows). Posteriorly, an impaction fracture of the ipsilateral sacral ala can be seen, with disruption of the sacral arcuate lines (black arrows). The asterisk (*) indicates that there is an abnormality on the radiograph, which is part of the red dot system or radiographer abnormality detection system in our institution.