Documentation of medical reason(s) for ordering an advanced brain imaging study (i.e. patient has an abnormal neurological examination; patient has the coexistence of seizures or both; recent onset of severe headache; change in the type of headache; signs of increased intracranial pressure (e.g. papilledema absent venous pulsations on funduscopic examination altered mental status focal neurologic deficits signs of meningeal irritation); hiv-positive patients with a new type of headache; immunocompromised patient with unexplained headache symptoms; patient on coagulopathy/anti-coagulation or anti-platelet therapy; very young patients with unexplained headache symptoms)
