title: Computed tomography in the evaluation of subdural hematomas.
abstract: Computed tomographic (CT) scans used in the diagnosis and management of subdural hematomas were analyzed with respect to their contribution to angiography and surgery. There has been a progressive increase in the use of CT in evaluating post-traumatic and postoperative subdural hematomas at the Mayo Clinic. At present, 40% of all patients undergo operation on the basis of the CT findings alone. False-positive diagnoses revealed at surgery have decreased to less than 4%. Erroneous negative interpretations have involved 10% of all patients whose diagnosis was subdural hematoma. Criteria for the interpretation of scans have been established.
mesh_terms: D001921:Brain / Q000000981:diagnostic imaging; D014695:Cerebral Ventriculography; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging*; D006801:Humans; D014057:Tomography, X-Ray Computed