We will measure the effect of Head CT Choice on : ( @ ) parent knowledge regarding their child 's risk of ciTBI , the available diagnostic options , and the risks of radiation exposure associated with a cranial CT scan ( primary outcome ) ; ( @ ) parent engagement in the decision-making process ; ( @ ) the degree of conflict parents experience related to feeling uninformed ; ( @ ) patient and clinician satisfaction with the decision made ; ( @ ) the rate of ciTBI at seven days ; ( @ ) the proportion of patients in whom a cranial CT scan is obtained ; and ( @ ) seven-day healthcare utilization .