Yes, but that's magic. Even in fantasy stories with magic, it's impossible or extremely limited. The only stories in which it's possible to any large extent involve an omnipotent god. Not even the usual range of divinity. Not even Odin, Zeus, etc, could do it.
On the subject of buffering, here's a number:
65,000,000,000,000,000,000,000,000,000
That's a rough estimate of the number of particles in the body of a medium sized adult, and that's assuming that you don't need to scan at a scale lower than proton/neutron/electron. I think you do, but I'm not sure. Even if you don't, that's farcically far too much data for an instantaneous scan (it has to be instantaneous because particles move) and writing to storage. How much data would you have to store per particle? I don't know, but that amount would be ludicrously huge even if it was 1 byte per particle.
Teleportation of humans, even in the "fax" sense, just isn't feasible using quantum entanglement. It might be very useful for secure data transfer, but teleporting humans or even small non-living objects isn't even on the cards. And it's limited to light speed to transmit information (which is the guts of the "fax teleportation" thing) and it's limited to signal transmission distance (and you must have
perfect signal transmission) and it's limited to between locations that have had entangled quanta physically taken to them. We're going to have to take a shuttlecraft from the Starship Enterprise to the planet's surface