Plain abdominal radiograph in the erect position showed heavy gas in the right subphrenic space with an elevated diaphragm.

Abdominal radiographs were taken to compare the progress of both pill and markers.

Methods and measurements: Physicians ordering plain abdominal radiographs completed data forms that included historical and physical examination information before viewing films.

Study objective: To prospectively evaluate previously described high-yield clinical criteria for obtaining plain abdominal radiographs in the emergency evaluation of children.