<prompt> Investigation of choice in clinical suspicion of strokeNoncontrast head CTContrast head CTNoncontrast head MRIContrast head MRI  <response>: After the clinical diagnosis of stroke is made, an orderly process of evaluation and treatment should follow. The first goal is to prevent or reverse brain injury. Attend to the patients airway, breathing, and circulation ABCs, and Treat hypoglycemia or hyperglycemia if identified. Perform an emergency noncontrast head CT scan to differentiate between ischemic stroke and hemorrhagic strokeRef: Harrison 19e pg: 2561 