Evaluation and measurement of the normal ventricular and subarachnoid spaces by CT.
D002552:Cerebral Ventricles / Q000033:anatomy & histology; D014695:Cerebral Ventriculography; D006801:Humans; D011011:Pneumoencephalography; D013346:Subarachnoid Space / Q000033:anatomy & histology; D013679:Technology, Radiologic; D014057:Tomography, X-Ray Computed