Easy for an isolated system. Human body is 6000 billion cells, each of them has many possible configurations, most of them share and process informations. I respectfully doubt there’s much to do with bits outside of a tiny bit if flesh in a petri dish.
Take whatever that mind-bogglingly huge number is, take the logarithm base 2, there you go, that's how many bits you need.
I just don’t see how that makes a practical sense in the context of the article. Doing a full "scan" of a tiny biological material to study it, ok. Doing a full scan of "our body" as MrMcCall describe (and reject it)? I don’t think it’s possible in a near future. I totally agree with Asraelite in theory but don’t think that will be apply in reality.