Persistence of intraventricular air after pneumoencephalography: its failure to distinguish between cerebral atrophy and normal pressure hydrocephalus.
D001927:Brain Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging*; D006850:Hydrocephalus, Normal Pressure / Q000000981:diagnostic imaging*; D011011:Pneumoencephalography