About half of children who go to the ER with head injuries get this radiation-heavy scan, and clinical observation first could help some who don't really need a CT avoid it.

NPR: Doc Groups Issue List Of Overused Tests, Therapies

When they arrived, the ER nurse at the local hospital thought Tyler looked fine, but Glowacz insisted on a head scan anyway.

CNN: 10 common kid health emergencies and what to do