▲ 1 ▼ 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. (en.wikipedia.org) submitted 3 years ago by thalamus@lemmy.world to c/neuro@lemmy.world comment fedilink hide all child comments 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.
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