title: Height of fourth ventricle. Normal variability during pneumography.
mesh_terms: D000375:Aging; D002552:Cerebral Ventricles / Q000033:anatomy & histology*; D014695:Cerebral Ventriculography; D003388:Cranial Fossa, Posterior / Q000000981:diagnostic imaging; D004548:Elasticity; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010100:Oxygen; D011011:Pneumoencephalography; D013382:Subtraction Technique; D014054:Tomography
chemical_list: D010100:Oxygen