You could totally (at least in theory) make a super-precise MRI scan of your brain at nanometer scale, send this data to wherever you want to go as a coherent b

You could totally (at least in theory) make a super-precise MRI scan of your brain at nanometer scale, send this data to wherever you want to go as a coherent beam of light (laser) and have the guy on the other hand rebuild your brain atom by atom. To the brain that would awake on the other side, the trip would have been instantaneous. Wether it's still you or someone else, ask philosophers.