Inclusion Criteria

Clinicians:

Our target study population includes clinicians with training in pediatrics (particularly
pediatric emergency medicine)or general emergency medicine. As clinical practice is likely
to vary among physicians with different training and in different settings, we will
include two types of sites for this trial:

1. Pediatric emergency departments with >80% of children cared for by pediatric
emergency medicine physicians or general pediatricians.

2. General emergency departments with >80% of children cared for by general emergency
medicine physicians.

Patients:

Inclusion:

- children younger than 18 years who

- sustained minor blunt blunt head trauma defined by Glasgow Coma Scale (GCS) scores of
14 or 15 on initial ED evaluation

Exclusion:

Patients who have any of the following:

- blunt head trauma > 24 hours prior

- penetrating trauma

- brain tumors

- coagulopathy

- ventriculoperitoneal shunts

- preexisting neurological disorders complicating assessment

- neuroimaging obtained at an outside hospital before transfer to a study site