The trigeminal nerve cistern.
D003287:Contrast Media; D003388:Cranial Fossa, Posterior / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D006801:Humans; D008722:Methods; D011011:Pneumoencephalography; D013346:Subarachnoid Space / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D014276:Trigeminal Nerve / Q000033:anatomy & histology* / Q000000981:diagnostic imaging
D003287:Contrast Media