title: [Diagnostic imaging in headache: when and how?].
mesh_terms: D001932:Brain Neoplasms / Q000175:diagnosis / Q000556:secondary; D003937:Diagnosis, Differential; D006261:Headache / Q000209:etiology*; D006801:Humans; D019586:Intracranial Hypertension / Q000175:diagnosis; D002546:Ischemic Attack, Transient / Q000175:diagnosis; D008279:Magnetic Resonance Imaging; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis; D014057:Tomography, X-Ray Computed