title: Computed tomography and pneumoencephalography compared to conductance to outflow of CSF in normal pressure hydrocephalus.
abstract: The conductance to outflow of CSF (Cout) was measured in 66 patients with normal pressure hydrocephalus (NPH). All patients were investigated with computed tomography (CT); 34 of the patients also had pneumoencephalography (PEG). Periventricular hypodensity on CT indicates a low Cout. Cortical sulci smaller than 1.9 mm on CT indicate a low Cout, while wide cortical sulci do not exclude a low Cout. There was a good correlation between ventricular size on CT and PEG, but the ventricular size is unrelated to Cout. No findings on PEG indicate a low Cout.
mesh_terms: D000328:Adult; D000368:Aged; D002540:Cerebral Cortex / Q000473:pathology; D002552:Cerebral Ventricles / Q000473:pathology; D014695:Cerebral Ventriculography; D002555:Cerebrospinal Fluid / Q000503:physiopathology; D002557:Cerebrospinal Fluid Shunts; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging*; D006850:Hydrocephalus, Normal Pressure / Q000134:cerebrospinal fluid / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D011011:Pneumoencephalography; D014057:Tomography, X-Ray Computed