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What's with the fake colors? later edit: dear downvoters, you only get gray levels from a CT and those pretty colors assigned after what I assume is automated
by stefantalpalaru 12y ago
What's with the fake colors?
later edit: dear downvoters, you only get gray levels from a CT and those pretty colors assigned after what I assume is automated segmentation don't improve the diagnosis. I'd guess that any segmentation errors make the visualization more difficult.
- wyldfire 12y agoInterestingly enough with modern CTs you can get more than strictly density/attenuation. Though you're right that indeed these images are using some transform between what they think bone and vascular densities and their colors.
- fluidcruft 12y agoYeah, I was wondering in particular about this one and whether it's actually used for anything other than looking pretty: http://media.tumblr.com/8f42d18fcc4aba25c9ded0e6d47e502b/tumblr_inline_nhuji4Q6FI1qzgziy.jpg http://media.tumblr.com/8f42d18fcc4aba25c9ded0e6d47e502b/tum... Maybe if it was part of a spin?
- ctdonath 12y agoAs fluidcruft said above: "The images in the link are also heavily manually post-processed which is labor intensive."
- Velox 12y agoThe colours provide contrast. It makes it much easier for a doctor to find the parts they are interested in as quickly as possible. Not to mention the fact that doctors aren't always interested in the tiniest imperfections and may be looking for large changes. When you have things segemented out and coloured, it is also much easier to view the object, be it an organ, blood vessel, etc. in 3 dimensions, which is something that is very useful. Admittedly, they can get in the way sometimes, but that's why it is an optional feature.