Biomarkers of Traumatic Brain Injury With Tbit System

Inclusion Criteria: * At least 18 years of age * Presents to the Emergency Department with suspected traumatic brain injury * Prescribed a non-contrast CCT as part of routine emergency care within 24 hours from injury * Blood sample collected for Tbit™ System within 12 hours of injury * Willing and able to provide informed consent or obtain consent from legal authorized representative (LAR) Exclusion Criteria: * Suspect of ischemic or hemorrhagic stroke with subsequent incidental trauma based on ED examination * Subject suspect of need of craniotomy for the acute trauma for this event * External signs compatible with a depressed skull fracture based on ED exam * Subject requiring administration of blood transfusion after injury and prior to study blood draw * Subject for whom timing of injury is unable to be estimated within 1 hour of certainty * Subject with a condition precluding entry into the CT scanner * Subject who had neurodegenerative disease or other neurological disorder including dementia, Parkinson's disease, multiple sclerosis, seizures, brain tumors, stroke or TIA within the last 30 days, or history of neurosurgery * Known or suspected to be pregnant * Prisoner or under incarceration * Participating in another clinical research study prior to this study completion