Marin JR, Rodean J, Mannix RC, et al. - Researchers performed a cross-sectional study to examine whether the presence of clinical guidelines and clinical decision support (CDS) for mild traumatic brain injury (mTBI) are correlated with lower use of head computed tomography (CT). They involved children discharged with mTBI and surveyed emergency department (ED) clinical directors to determine the presence and implementation year of clinical guidelines and CDS. There were 216,789 children discharged from the hospital with mTBI, and CT was conducted during 20.3% of ED visits. Clinical guidelines for mTBI, and especially CDS, were linked to lower rates of head CT use with no negative clinical outcomes.