title: Subdural hematoma: is it or is it not acute?
mesh_terms: D000208:Acute Disease; D000328:Adult; D002533:Cerebral Angiography; D002908:Chronic Disease; D003937:Diagnosis, Differential; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging*; D006801:Humans; D013997:Time Factors