A patient presents to the emergency department of AIIMS with the most severe headache of his life. What should be done next?: (A) Contrast enhanced computed tomography (CT), (B) Noncontrast CT, (C) Magnetic resonance imaging (MRI), (D) Lumbar puncture (LP)
Answer is B. ANS. B* Investigation of choice in subarachnoid hemorrhage (SAH): Noncontrast CT* Investigation of choice in aneurysm: DSA* Investigation which can diagnose ischemia in brain earliest: MRI (diffusion weighted imaging, within 3-30 minutes)* First imaging investigation to be done in a patient with suspected stroke: Noncontrast CT.