I'm not worried about 'nondestructive' scanning; I'm curious when LWers believe /any/ form of em can arrive. (I simply haven't been able to find any numbers on destructive scanning resolution, so the nondestructive scanning numbers are the most relevant ones I could include in my comment.) If a brain has to be vitrified, or chemically fixated, or undergo some other irreversible process, and then microtomed, but the result is data that would allow the creation of an em - then that would be included in my question.