I see what you are thinking
Imagine that someone could stick your head in an MRI and look into your brain to see what’s going on. Now imagine that, when you look at a particular image, certain patterns show up on the MRI. Maybe a clever researcher could decode those patterns to see what you are seeing by looking inside your brain.
Imagine no longer.
The image on the left is what the subject is seeing. The image on the right is reconstructed from the MRI.