Data on 1,381 children and teens who were taken to an emergency department for head injuries revealed that 49% of them were observed before making a decision about a computed tomography scan, while the rest immediately received a CT scan. Because most symptoms resulting from the injury improved while under observation, researchers said longer observation time was linked to reduced orders for CT scans, which is desirable to reduce radiation exposure and its associated risk of cancer. The study was published in the Annals of Emergency Medicine.

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