1. The document outlines the workflow and procedures for performing an emergent CT brain perfusion scan for a potential stroke patient. Key steps include alerting necessary personnel, transporting the patient directly to the CT department, performing a non-contrast head CT to check for hemorrhage, and if no hemorrhage is found, performing a CT brain perfusion scan according to the specified protocol. 2. The protocol utilizes a dual-phase CTA technique with 80kV, 50mA scans and intravenous injection of contrast to generate perfusion maps of cerebral blood flow, volume, mean transit time and time to peak to identify areas of reduced flow indicative of a stroke and its severity. 3. If a stroke