I doubt this is AI. This looks right for a micro-CT angiograph.

The blood vessels will have X-ray opaque dye injected, so they stand out on the CT. You can then set a threshold in the visualization software to filter out other tissue. The software then uses an algorithm to apply some shading to the surfaces of the unfiltered tissue to create a 3D effect.

The red colouring is a choice of the user, it just colours darker parts red and fades out to transparency.

I program for a living and I think of it more as doing the interesting tasks all day, rather than the mundane and repetitive. Chat GPT and GitHub Copilot are great for getting something roughly right that you can tweak to work the way you want.