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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 2 years ago by thalamus@lemmy.world to c/science@lemmy.world

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cross-posted from: 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.

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[–] SomeoneElse@lemmy.world 17 points 2 years ago (8 children)

Jesus Christ. I will never again complain about noisy, claustrophobic MRI machines.

[–] SuperSoftAbby@lemmy.world 3 points 2 years ago (7 children)

I’m still not sure why every one hates them. I found my CT experience pretty soothing.

[–] Steve@compuverse.uk 3 points 2 years ago

MRI is much longer and louder than CT

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