A cat scan is just as it sounds: cat + scanner = art. Just leave your scanner open and let your cat know its okay for him to sit on it. Try not to force the cat onto your scanner if he doesn't want to participate. If you want to take a cat scan of your own make sure your kitty doesn't get harmed: Do not scan your cat when his eyes are directly exposed to the bright light of your scanner.
The WRONG way to take a cat scan:
The RIGHT way to take a cat scan:
Here's an example of what your cat's scan might look like:
Disclaimer: Don't blame me for any harm your kitty does to the scanner. I've never attempted to scan my own cat! I do have an extra scanner though, so I think I'll try it one of these days.