Yield of Computed Tomography (CT) Angiography in Patients with Acute Headache, Normal Neurological Examination, and Normal Non Contrast CT: A Meta-Analysis

Diagnostic yield of CTA in patients with acute headache, normal neurological examination, and normal NCCT is low, but because of the possible therapeutic consequences, its use might be justified in the emergency setting. Prospective studies confirming these results including cost-effectiveness analyses are needed.