ThalamusTIL before CT and MRI’s were available, doctors used to replace the fluid in and around the brain with air to do imaging with X-rays.
TIL before CT and MRI’s were available, doctors used to replace the fluid in and around the brain with air to do imaging with X-rays. - Lemmy.world
cross-posted from: https://lemmy.world/post/1779005 [https://lemmy.world/post/1779005] > Apparently this was done because air captures less X-rays than CSF and thus creates more contrast with brain tissue compared to the cerebrospinal fluid. > > Unfortunately this was pretty painful and uncomfortable.