Inclusion Criteria:  Age 0-17 years Known or suspected exposure to blunt trauma  At least one of the following applies to the patient:  Undergoing trauma team evaluation Transported from the scene to participating facility by EMS Undergoing cervical spine imaging at participating facility Transferred to participating facility with cervical spine imaging  Exclusion Criteria:  Exposed to solely penetrating trauma (e.g. a gunshot or stab wound)